Abstract

The present invention provides a prediction method for stall and surging of an axial-flow compressor based on a deep autoregressive network. Firstly, selecting and preprocessing surging experimental data of a certain type of aero-engine, and dividing the data into a training set and a test set. Secondly, building and training a deep autoregressive network model based on an attention mechanism, using the finally trained model to conduct real-time prediction on the test set, and giving a model loss and an evaluation index. Finally, using a prediction model to conduct real-time prediction on the test data, and giving a trend of surging probability varying with time in chronological order. The present invention uses the attention mechanism to effectively capture the features of the experimental data and accurately predict the surging probability, which improve the stability and accuracy of prediction, is beneficial to improving the performance of active control of the engine.

IPC Classes  ?

• F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
• G06N 3/047 - Probabilistic or stochastic networks

Abstract

The present disclosure discloses a method for encrypting a visually secure image based on adaptive block compressed sensing and non-negative matrix decomposition. Firstly, the Tetrolet transform is performed on the plain image, then the sparsity degree is optimized on the sparsity matrix and the matrix scrambling is performed, such that the sparsity degree in each block region of the image matrix is equalized. Then according to the image information, the sampling number of the block region is calculated, the measurement matrix is constructed and optimized, and the image is compressed by using the optimized measurement matrix. The compressed image is then scrambled and diffused to complete the encryption process. Finally, the image information is embedded into the carrier image through non-negative matrix decomposition to obtain a visually safe ciphertext image. The decryption process is the inverse of the encryption process.

IPC Classes  ?

• H04L 9/06 - Arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for blockwise coding, e.g. D.E.S. systems

Abstract

A double-sided polishing method for an optical lens belongs to the technical field of ultra-precision machining. In the double-sided polishing method, upper and lower surfaces of the lens are polished simultaneously by arranging abrasive tools on upper and lower positions of the lens, making the abrasive tools close to the upper and lower surfaces of the lens to swing back and forth in the polishing process, producing relative motion and removing the surface materials. In the present invention, in order to eliminate a problem of removal ununiformity, a method for swing machining of abrasive tools and methods for turning over and polishing of workpieces are adopted in a polishing process, which can realize the high efficiency double-sided high-precision machining for a nonplanar lens, and the method can be applied to the double-sided polishing for different types of lenses.

IPC Classes  ?

• B24B 37/08 - Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for double side lapping
• B24B 37/04 - Lapping machines or devices; Accessories designed for working plane surfaces

Abstract

A method for constructing a quantum echo state network model for an aero-engine fault early-warning. The method comprises: first, quantizing time series data of an aero-engine; then, using quantum state data as an input of a quantum network of a first layer and subjecting same to the action of a quantum recursive circuit, and then obtaining a probabilistic output by means of quantum measurement and transferring same to a reservoir of an echo state network of a second layer, so as to obtain a high-dimensional intermediate state; and finally, performing computation only once by using a least squares method, such that a weight matrix of an output layer can be obtained, thus completing network training. A trained quantum echo state network model is applied to aero-engine fault prediction, thereby providing relatively high-accuracy operation state prediction data of an engine at a future moment. In the present invention, a quantum controlled NOT gate is utilized to realize an entangled state, so as to approximately represent a possible coupling relationship between original input data, and a quantum rotation gate is set to be an adjustable parameter of a quantum network of a first layer, such that the distribution of data can be adjusted; moreover, an echo state network layer can exert the computational advantage of fast computation and completion of a final model with one-step training.

IPC Classes  ?

• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
• G06N 3/063 - Physical realisation, i.e. hardware implementation of neural networks, neurons or parts of neurons using electronic means

Abstract

The present invention belongs to the field of mechanical transmission technology, and proposes a non-orthogonal elliptical toroidal worm gear pair, including an involute cylindrical gear and an elliptical toroidal worm formed by a primary envelope of the involute cylindrical gear; both adopt spatial non-orthogonal transmission, and the shaft angle satisfies the self-locking condition and the restriction condition of minimum tooth top width; the toroidal generatrix of the elliptical toroidal worm is elliptical, which can increase the number of meshing teeth and the total length of instantaneous contact line. A non-orthogonal elliptical toroidal worm gear pair proposed in this invention has the characteristics of toroidal worm drive and can realize the whole facewidth of the gear to participate in the meshing drive. It can be used in the fields of precision continuous indexing transmission, continuous lapping of cylindrical gear tooth flank, and has good popularization application value and industrialization prospect.

IPC Classes  ?

• F16H 1/16 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
• F16H 55/08 - Profiling
• F16H 55/22 - Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears

Abstract

The present invention provides a high-efficient magnesium ion removal system for salt lake brine based on in situ alkali production using bipolar membrane electrochemical process, it is constructed with cathode, cathode cell, anode, anode cell, and anion exchange membranes, bipolar membranes, acid cells, alkali cells, mesh materials for precipitate aggregation, acid-washing cells. During the working stage, salt lake brine enters the alkali cell, in which magnesium ions react with hydroxide groups and generate precipitate in mesh materials for precipitate aggregation, meanwhile magnesium-removed salt lake brine is produced; pure water enters acid cell, in which hydrochloric acid is produced and then exported to acid-washing cell; the mesh materials for precipitate aggregation, after they are packed with magnesium hydroxide particles, would be periodically transferred into acid-washing cell, in which magnesium hydroxide would react with hydrochloric acid and generate magnesium chloride solution, and the mesh materials are recycled after regeneration for precipitate aggregation.

IPC Classes  ?

• C02F 1/469 - Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
• C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange

Abstract

Disclosed in the present invention is an inhaul cable tension identification algorithm considering semi-rigid constraints at two ends. The present invention only requires basic parameters such as the length of an inhaul cable and mass per unit length of the inhaul cable, and uses modal identification algorithms, such as a random subspace algorithm and a frequency domain decomposition algorithm, to process signals collected by an acceleration sensor, so as to obtain corresponding first-order natural frequency and vibration mode, thus solving the cable tension without requiring any other data in advance. Compared with the existing string vibration theory, the present invention simplifies an inhaul cable into an equivalent single-degree-of-freedom system, corrects the first-order natural frequency of the inhaul cable using the vibration mode obtained by means of modal identification, thus avoiding cable tension identification errors caused by changes in the mechanical characteristics of inhaul cable boundaries, and improving the cable tension measurement efficiency and accuracy. The present invention has very good application prospects in the aspect of cable tension real-time monitoring of inhaul cable structures. This method is especially suitable for structures having the mechanical characteristics of inhaul cable boundaries continuously changing along with working conditions in actual operation, and has high practicability and wide applicability.

IPC Classes  ?

• G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes

Abstract

A submicron-sized Pickering miniemulsion system stabilized by carbon quantum dots solid nanoparticles for biphasic catalysis is disclosed, which breaks the existing limits for homogenization of the immiscible biphasic system and overcomes the issues for big size of solid particles-stabilized emulsion droplets. A method for producing the carbon quantum dot-based catalysts and a process of establishing the Pickering miniemulsion system for biphasic reaction with enhanced catalytic efficiency are also disclosed. The carbon quantum dot-stabilized Pickering miniemulsion features a pH-responsive behavior, with a reversible transition between the emulsification and demulsification, triggering the easy & facile product separation and emulsifier/catalyst recycling in one reaction vessel.

IPC Classes  ?

• B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
• B01J 21/18 - Carbon
• B01J 23/46 - Ruthenium, rhodium, osmium or iridium
• B01J 37/00 - Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
• B01J 37/02 - Impregnation, coating or precipitation
• B01J 37/04 - Mixing
• B01J 37/16 - Reducing
• B01J 37/34 - Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves
• C07C 45/29 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of hydroxy groups

Abstract

An injectable, moldable and printable gramular hydrogel material crosslinked by non-covalent and covalent bonds, a preparation method therefor, and applications thereof are provided. The material uses gelatin particles or particles that have core-shell structures as basic structural units, and forms a continuous and porous particle network by means of the reversible non-covalent crosslinking and covalent bond crosslinking of the particles. The gelatin particles or the particles that have core-shell structures form a continuous porous particle network by means of reversible self-assembly under the effect of the non-covalent bonds, thus achieving injectable, printable, moldable and self-healing properties. Furthermore, high strength granular hydrogels are formed by means of initiating covalent crosslinking. The material can be used as a drug-sustained release carrier, a tissue engineering scaffold and a tissue adhesive hemostatic material in the field of biomedicine.

IPC Classes  ?

• A61L 27/52 - Hydrogels or hydrocolloids
• A61L 24/00 - Surgical adhesives or cements; Adhesives for colostomy devices
• A61L 24/10 - Polypeptides; Proteins
• A61L 27/22 - Polypeptides or derivatives thereof
• A61L 27/56 - Porous or cellular materials
• A61L 31/04 - Macromolecular materials
• A61L 31/14 - Materials characterised by their function or physical properties

Abstract

Disclosed in the present invention is a visual security image encryption method based on adaptive block compressed sensing and non-negative matrix factorization. The method comprises: firstly, performing Tetrolet transform on a plaintext image; then optimizing the sparsity of a sparse matrix, and performing matrix scrambling, such that the sparsity in each block division area of an image matrix is equalized; then, calculating a sampling number of the block division area according to image information, constructing and optimizing a measurement matrix, and compressing the image by using an optimized measurement matrix; next, performing scrambling and diffusion operations on a compressed image to complete an encryption process; and finally, embedding the image information into a carrier image by means of non-negative matrix factorization, so as to obtain a visual security ciphertext image. A decryption process is an inverse process of the encryption process. A plaintext image is encrypted by means of the encryption method in the present invention, and the whole process is closely related to plaintext information, such that the entire encryption system has a relatively high capacity for resisting against chosen-plaintext attacks and known-plaintext attacks.

IPC Classes  ?

• H04L 9/00 - Arrangements for secret or secure communications; Network security protocols

Abstract

Disclosed are an omnidirectional observation under-actuated capsule robot and an axial flip magnetic control operation method therefor. A radially magnetized neodymium-iron-boron magnetic ring is placed within a cavity of a capsule sphere in a non-connection mode. The neodymium-iron-boron magnetic ring independently follows a rotating magnetic field, races around a capsule axis, and is completely suspended within the cavity of the capsule sphere filled with silicone oil. Under the actuation of a coaxial following magnetic moment, the under-actuated capsule sphere cannot self-rotate around the capsule axis, but the capsule axis can flip over synchronously following a rotation axis of the magnetic field. By means of the sequential scan within a conical range where the capsule axis forms a certain angle with a vertical direction using a universal magnetic field, or by means of continuous circular flips within a vertical plane parallel to an intestinal bending direction, the capsule robot can achieve omnidirectional observation and diagnosis within the body cavity and navigate along bending directions in constrained environments including the gastrointestinal tract. The present invention improves the scanning range of the capsule, enhances environmental adaptability, achieves high precision in capsule positioning and posture adjustment, enables stable rolling and navigation, and provides a good visual observation effect, thus holding good application prospects.

IPC Classes  ?

• A61B 1/04 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
• A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
• A61B 1/273 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the upper alimentary canal, e.g. oesophagoscopes, gastroscopes
• A61B 1/31 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the rectum, e.g. proctoscopes, sigmoidoscopes

Abstract

The present invention belongs to the field of recovery of secondary resources of noble metals, and discloses a method for leaching platinum group metals from spent catalyst by UV-vis, which uses ferric oxalate complex/hydrogen peroxide-chloride salt solution as a solvent for extracting platinum group metals under the condition of UV-vis, converts the platinum group metals from metallic state to platinum group metal complex, and obtains platinum group metal lixivium to realize the leaching of the platinum group metals. The platinum leaching rate of the method of the present invention can reach more than 97%. The present invention has mild reaction conditions, realizes the green recovery of platinum group metals from spent catalyst, avoids the use of strong acids and bases and toxic substances and avoids the production of toxic gases in the leaching process, so as to reduce the environmental hazards of the spent catalyst.

IPC Classes  ?

• C22B 11/00 - Obtaining noble metals
• C22B 1/248 - Binding; Briquetting of metal scrap or alloys

Abstract

The present invention belongs to the field of aero-engine fault diagnosis. Provided is a fault-tolerant soft-hard hybrid control method for fault diagnosis of a sensor of an aero-engine. In the method, detection of a soft/hard fault of a sensor of an aero-engine and estimation of the true state of a system are realized by means of a Kalman filter group in a soft/hard fault diagnosis system. A designed soft-fault diagnosis system performs residual processing on measured values of sensors and estimated values of a group of Kalman filters, and solves the weighted sum of squares of same, so as to compare the weighted sum with a known threshold value to further detect whether there is a fault. A designed hard-fault diagnosis system compares the residual absolute value of the measured values of the sensors and the estimated value of a Kalman filter with the known threshold value, so as to further detect whether there is a fault. It is verified that by means of the method, the negative effect of a fault of a sensor of an aero-engine on the overall performance of a system can be effectively removed, such that the system is more stable, and various performance indexes can better meet requirements.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring
• G01D 18/00 - Testing or calibrating apparatus or arrangements provided for in groups

Abstract

A capsule network-based motor imagery electroencephalography (EEG) signal recognition method, relating to the technical field of deep learning and brain-computer interfaces, comprising: mapping EEG time series into a three-dimensional array form according to electrode space distribution; constructing a three-dimensional capsule network (3D-CapsNet) motor imagery EEG signal recognition model by combining a capsule network with 3D convolution, a 3D convolution module using multi-layer 3D convolution to extract features from a time dimension and an inter-channel space dimension at the same time to obtain low-level features; integrating, by means of the capsule network, the low-level features outputted by the 3D convolution module to obtain a high-level space vector comprising the relationship between the features; and connecting a primary capsule and a motion capsule by using a dynamic routing, wherein a capsule network module finally outputs a classification result by means of a nonlinear activation function squash. By using a capsule network-based inter-capsule dynamic routing connection mode to replace a traditional fully connected layer, the need of a network to use a pooling layer to reduce a feature dimension is avoided, and many EEG detail features are retained, thereby ensuring effective feature extraction.

IPC Classes  ?

• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/08 - Learning methods
• A61B 5/372 - Analysis of electroencephalograms
• G06F 18/24 - Classification techniques

Abstract

A shape-controlled flexible polishing method for a microarray mold. The following solution is used: a magnet is mounted below a microarray mold (3), so that a prepared magnetic abrasive is attached to the surface of the microarray mold (3) under the action of a magnetic field force to generate contact pressure; a tip-containing polishing tool (1) is mounted above the microarray mold (3), and the tip-containing polishing tool (1) has the capability of attracting the magnetic abrasive; the tip-containing polishing tool (1) rotates, and under the action of a magnetic force and a centrifugal force, the magnetic abrasive at the tip of the tip-containing polishing tool forms a spherical polishing head; or the following solution is used: a ball-end milling cutter (8) is mounted above the microarray mold (3) by using a shear thickening fluid (11); by means of high-speed rotation of the ball-end milling cutter (8), the shear thickening fluid (11) is driven to rotate and a relative shear motion is generated; and polishing is performed under the action of the shear thickening effect. The shape-controlled flexible polishing method for a microarray mold can be adapted to the curvature of feature points of microarray molds, achieve efficient polishing of microarray molds, ensure the original surface shape precision of microarray molds, and achieve high surface quality.

IPC Classes  ?

• B24B 1/00 - Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
• B24B 29/02 - Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
• B24B 49/04 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation

Abstract

The present invention provides an optimization control method for an aero-engine transient state based on reinforcement learning, and belongs to the technical field of aero-engine transient states. The method comprises: adjusting an existing twin-spool turbo-fan engine model as a model for invoking a reinforcement learning algorithm; to simultaneously satisfy high level state space and continuous action output of a real-time model, designing an Actor-Critic network model; designing a deep deterministic policy gradient (DDPG) algorithm based on an Actor-Critic frame, to simultaneously solve the problems of high-dimensional state space and continuous action output; training the model after combining the Actor-Critic frame with the DDPG algorithm; and obtaining the control law of engine acceleration transition from the above training process, and using the method to control an engine acceleration process.

IPC Classes  ?

• F02C 9/44 - Control of fuel supply responsive to the speed of aircraft, e.g. Mach number control, optimisation of fuel consumption
• G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators

Abstract

Disclosed is an implementation method for ultrasensitive Brink control for a delayed enzymatic reaction based on DNA strand displacement (DSD), relating to the field of feedback control technology based on DSD in biological systems. The method includes obtaining an enzymatic reaction process model with time delay; constructing a CRN-based Brink controller; obtaining a static mapping expression between an output of the Brink controller and an output of the system under a steady state condition; constructing a Brink controller by DSD reaction; obtaining a time delay representation, and applying it to DNA implementations of the enzymatic reaction process model; and combined with the Brink controller, controlling a delayed enzymatic reaction process model. The present invention is structurally free of subtraction, reduces the number of abstract chemical reactions required to implement, and greatly simplifies DNA implementation.

IPC Classes  ?

• G16B 20/10 - Ploidy or copy number detection
• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
• G16B 5/00 - ICT specially adapted for modelling or simulations in systems biology, e.g. gene-regulatory networks, protein interaction networks or metabolic networks

Abstract

The present invention proposes an in-situ freezing machining method for an integrated thin-walled array structure. In the method, the area among cups is cut off first; then, the outer walls of a cup array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cup array is carried out. Then, hoisting and turning over are carried out, and the area among cavities is cut off; then, the outer walls of a cavity array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cavity array is carried out. The method realizes in-situ freezing clamping of workpieces, avoids error accumulation caused by repeated installation of a fixture, and can refrigerate efficiently, suppress ambient and cutting thermal interference, and ensure the stability of freezing fixture.

IPC Classes  ?

• B23Q 3/08 - Work-clamping means other than mechanically-actuated
• B23Q 3/06 - Work-clamping means

Abstract

A method for request scheduling in an unmanned aerial vehicle-assisted mobile edge computing network: determining multiple feasible UAV deployment points based on obstruction information in a target area; randomly selecting U feasible UAV deployment points from the multiple feasible UAV deployment points as UAV deployment points; dividing each UAV into multiple virtual UAVs; allocating user requests in a central queue of a UAV-assisted MEC to the virtual UAVs; using a round-robin policy to schedule the user requests allocated to each virtual UAV; after a specified time period t, if a network pressure mitigation condition isn't met, inputting historical user request data of each feasible UAV deployment point into a trained MT-LSTM neural network model, obtaining a to-be-processed data volume of each feasible UAV deployment point in a next specified time period t; re-determining UAV deployment points; redeploying UAVs carrying small cell base stations based on the new UAV deployment points.

IPC Classes  ?

• H04B 7/185 - Space-based or airborne stations
• H04L 47/62 - Queue scheduling characterised by scheduling criteria
• H04W 28/02 - Traffic management, e.g. flow control or congestion control

Abstract

A spike echo state network model for aero engine fault prediction, which belongs to the technical field of aero engine fault diagnosis. The method comprises: 1) acquiring various sensor signals of each flight number of an aircraft, selecting appropriate sample features of data, preprocessing each piece of state data, and dividing data segments according to fault labels, so as to form sample sets; 2) constructing a spike echo state network, which includes a spike input layer, a spike reserve pool and a training output layer; 3) training a spike echo state network model by using a data sample set of an aero engine, and calculating prediction results of a training set and a test set by using the trained spike echo state network model; and 4) providing the prediction results to an aero engine detection and early warning device for use. By means of the present application, a future development tendency of an operation state of an aero engine can be automatically given according to an operation law thereof, and a change situation of each performance parameter index of the aero engine within a short period of time can be accurately predicted for assisting a unit in determining whether a fault will occur in the aero engine, such that early warning for the fault is more intelligent.

IPC Classes  ?

• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/06 - Physical realisation, i.e. hardware implementation of neural networks, neurons or parts of neurons

Abstract

The present invention provides an optimization algorithm for automatically determining variational mode decomposition parameters based on bearing vibration signals. First, mode energy is used to reflect bandwidth, a bandwidth optimization sub-model is established to automatically obtain optimal bandwidth parameter αopt. Secondly, energy loss optimization sub-model is established to avoid under-decomposition. Thirdly, a mode mean position distance optimization sub-model is established to prevent the generation of too much K and avoid the phenomenon of over-decomposition. Finally, considering the interaction between the bandwidth parameter α and the total number of modes K, the interaction between mode components and the integrity of reconstruction information, nonlinear transformation is performed by a logarithmic function, so as to make the values of three optimization sub-models form similar scales, obtain an optimization model that can automatically determine optimal VMD parameters αopt and Kopt, and establish a quantitative evaluation index for the decomposition performance of a VMD algorithm.

IPC Classes  ?

• G01M 13/045 - Acoustic or vibration analysis
• G06N 3/126 - Evolutionary algorithms, e.g. genetic algorithms or genetic programming

Abstract

A method for implementing ultra-sensitive brink control over a delayed enzymatic reaction on the basis of DNA strand displacement, which method relates to the technical field of feedback control based on DNA strand displacement in biological systems. The method comprises: obtaining an enzymatic reaction process model, which has a time delay; constructing a brink controller based on CRNs; acquiring a static mapping expression between the output of the brink controller and the output of a system under a steady-state condition, so as to obtain an analysis condition capable of ensuring the performance of the controller; implementing the construction of the brink controller by means of a DNA strand displacement reaction; and acquiring a time delay representation mode, applying same to DNA implementation of the enzymatic reaction process model, and controlling the rewritten enzymatic reaction process model in view of the constructed brink controller. The method does not involve a subtraction operation in terms of structure, thereby reducing the number of abstract chemical reactions for implementation, and greatly simplifying the complexity of DNA implementation.

IPC Classes  ?

• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
• G16B 5/00 - ICT specially adapted for modelling or simulations in systems biology, e.g. gene-regulatory networks, protein interaction networks or metabolic networks
• G16C 20/10 - Analysis or design of chemical reactions, syntheses or processes

Abstract

2+ can reach 99.7%, 99.4%, 99.5%, 98.7%, and 99.5%, respectively. The special three-dimensional (3D) cross-linked network structure of the loofah nanofiber crystal and the excellent physical and chemical adsorption properties and ion exchange capacity of the RHA are fully used in the curing agent of the present disclosure.

IPC Classes  ?

• B09B 3/21 - Agglomeration, binding or encapsulation of solid waste using organic binders or matrix
• B09B 101/30 - Incineration ashes
• C04B 18/10 - Burned refuse
• C04B 18/24 - Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper
• C04B 22/06 - Oxides; Hydroxides
• C04B 28/02 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
• C04B 40/00 - Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
• C04B 103/10 - Accelerators
• C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone

Abstract

A honeycomb core with S-shaped reinforced structures includes multiple cylindrical unit cells arranged in a honeycomb shape and with a polygonal cross section, the cylindrical unit cells are divided into plain unit cells and S-shaped reinforced unit cells, an inner cavity of the plain unit cell is hollow, and the inner cavity of the S-shaped reinforced unit cell is equipped with an S-shaped reinforced structure, a cross section of the S-shaped reinforced structure is S-shaped and the inner cavity of the S-shaped reinforced unit cell is divided into two halves on average. This structure guides the load-transfer path effectively by controlling the rotation of S-shaped reinforced cells, it changes the position of plastic collapse in the structure, and finally changes the peak load of the core. Under different working conditions, the design of the arrangement of S-shaped reinforced structures can make the core produce different peak loads.

IPC Classes  ?

• B32B 3/12 - Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by a layer of regularly-arranged cells whether integral or formed individually or by conjunction of separate strips, e.g. honeycomb structure
• B32B 3/08 - Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts

Abstract

The present invention relates to a 600° C./1 GPa high-temperature ultra-high strength Ti alloy and a preparation method therefor, and belongs to an alloy system of Ti—Al—Zr—Sn—Si plus refractory metals. The 600° C./1 GPa high-temperature ultra-high strength Ti alloy comprises the following main components by mass percent: 5.2 wt. %-6.0 wt. % of Al, 6.2 wt. %-12.5 wt. % of Zr, 5.8 wt. %-6.5 wt. % of Sn, 0.3 wt. %-1.5 wt. % of Si and the balance of Ti element, refractory metals and other unavoidable impurities. Firstly, an alloy is prepared after incoming materials quality inspection. Secondly, a high-melting point master alloy and a low-melting point Al—Sn master alloy are respectively prefabricated to inhibit the uneven dissolution of elements and improve the microstructure homogeneity. Finally, the alloy blocks are subjected to vacuum arc melting to prepare an alloy. The present invention is convenient for mass production and can be used as an alternative material for high-temperature structural components of cutting-edge aviation and weapon equipment.

IPC Classes  ?

• C22C 14/00 - Alloys based on titanium
• C22C 1/03 - Making non-ferrous alloys by melting using master alloys

Abstract

A deep image watermarking method based on mixed frequency-domain channel attention, which relates to the fields of artificial neural networks and digital image watermarking. The method comprises: step 1, a watermark information processor generating a watermark information feature map; step 2, an encoder generating a watermark image by using a carrier image and the watermark information feature map; step 3, in a noise layer, taking the watermark image as an input, and generating a noise image by means of simulated differentiable noise; step 4, a decoder performing down-sampling on the noise image, so as to recover watermark information; and step 5, an adversarial discriminator classifying the carrier image and the watermark image, such that the encoder generates a high-quality watermark image. In the method, an end-to-end deep watermarking model is combined with frequency-domain channel attention, such that the application range of a deep neural network in the field of image watermarking is expanded; and a new encoder structure is designed by means of a frequency-domain channel attention module, thereby finally obtaining a watermark image of relatively high quality and watermark information having a relatively good decoding effect.

IPC Classes  ?

• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

The present disclosure discloses a method for watermarking depth image based on mixed frequency-domain channel attention, relating to the field of artificial neural networks and digital image watermarking; the method includes: step 1: a watermark information processor generating a watermark information feature map; step 2: an encoder generating a watermarked image from a carrier image and a watermark information feature map; step 3: a noise layer taking the watermarked image as an input, and generating a noise image through simulated differentiable noise; step 4: a decoder down-sampling the noise image to recover watermark information; step 5: a countermeasure discriminator classifying the carrier image and the watermarked image such that the encoder generates a watermarked image with a high quality. The present disclosure combines the end-to-end depth watermark model with frequency-domain channel attention to expand an application range of the depth neural network in the field of image watermark.

IPC Classes  ?

• G06T 1/00 - General purpose image data processing
• G06T 3/40 - Scaling of a whole image or part thereof
• G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
• G06V 10/771 - Feature selection, e.g. selecting representative features from a multi-dimensional feature space

Abstract

A photosensitizer molecule increases the retention time thereof in a tumor and the enhancement of the therapy for large-volume tumors. AN-BDP is synthesized by means of introducing anthracene into BODIPY-meso, and due to the strong intermolecular π-π interaction of anthracene, AN-BDP and an amphiphilic block copolymer DSPE-PEG2000 are self-assembled into stable nanoparticles AN-BDP NPs. By means of anthracene, AN-BDP can be excited to a triplet excited state under light irradiation and acts with O2 to generate 1O2. AN-BDP NPs are enriched at the tumor site and retained for about 10 days after tail vein injection. In a mouse tumor model having a conventional volume tumor, AN-BDP NPs can completely inhibit the growth of the tumor by means of one-time tail vein injection and one-time photoirradiation therapy.

IPC Classes  ?

• A61K 9/51 - Nanocapsules
• A61K 41/00 - Medicinal preparations obtained by treating materials with wave energy or particle radiation
• C07F 5/02 - Boron compounds
• A61K 9/00 - Medicinal preparations characterised by special physical form
• A61P 35/00 - Antineoplastic agents

Abstract

Disclosed in the present invention is an anhydrous anaerobic operation method, belonging to the technical field of chemistry. The present invention uses a low-melting-point organic solid instead of a liquid solvent subjected to anhydrous anaerobic treatment, and uses a vacuumizing method to remove air, so as to eliminate water and oxygen in a reaction system. After heating, the low-melting-point organic solid is melted to serve as a solvent, and reactants react under the heating condition. In addition, since the reaction system is all solid before heating, avoiding liquids being gasified and escaped due to excessively high degrees of vacuum, a higher degree of vacuum may be used for vacuumizing so as to thoroughly extract air including air adsorbed on the surface of the solid, thereby completely eliminating the water or oxygen in the reaction system, and avoiding the need of feeding an inert gas to replace air anymore. The method has simple operation and low costs and may be popularized and applied in a large scale.

IPC Classes  ?

• C08G 61/10 - Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aromatic carbon atoms, e.g. polyphenylenes
• B01J 20/26 - Synthetic macromolecular compounds

Abstract

A sliding removable coaxial capillary microfluidic chip and a preparation method therefor. The chip comprises a substrate which has a hole as a window; an alignment platform I and II are respectively fixed on both sides of the window, and the alignment platform I is internally provided with a circular groove I and a square groove I formed successively on the same axis; the alignment platform II is internally provided with a circular groove II and a square groove II formed successively on the same axis; both ends of a square capillary are respectively placed in the square groove I and II, one circular capillary enters the square groove I through the circular groove I, one end of another circular capillary is placed in a sliding platform, and the other end slides through the sliding platform and enters the square groove II through the circular groove II.

IPC Classes  ?

• B01L 3/00 - Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers

Abstract

A high-throughput microstructure characterization and reconstruction method of heterogeneous materials is provided. By extracting the features such as content, size and morphology of each constituent phase in the microscopic image of heterogeneous materials, and combining the principles of physical descriptor and texture synthesis method, the constituent phase with 10 microns scale, regular geometrical morphology and low content is characterized and reconstructed based on the physical descriptor, and the constituent phase with 100 microns scale, complex geometrical morphology and high content is characterized and reconstructed based on texture synthesis, and then the composition is adjusted to compensate for the overlapping pixels of each constituent phase to obtain batch reconstructed images.

IPC Classes  ?

• G06T 7/00 - Image analysis
• G06T 3/40 - Scaling of a whole image or part thereof
• G06T 7/136 - Segmentation; Edge detection involving thresholding

Abstract

This invention relates to a method for preparing of a submicro/nano-porous NiO/apatite-type lanthanum silicate anode functional layer. In the method a functional layer nanopowder, ethyl cellulose and terpineol are added into a rotary evaporation bottle containing anhydrous ethanol, and a suspension obtained after mixing is dispersed ultrasonically. The anhydrous ethanol in the suspension is removed by a rotary evaporator. When the suspension becomes a viscous paste, the paste is taken out and ground to complete the preparation of a functional layer paste. The functional layer paste is applied onto an anode substrate by screen printing, and 3 sublayers are screen printed. After dried, the sublayers are heat treated and sintered. The heating rate, the cooling rate and the holding time are controlled in the heating and cooling processes to complete the preparation of the anode functional layer.

IPC Classes  ?

• H01M 4/86 - Inert electrodes with catalytic activity, e.g. for fuel cells
• H01M 4/88 - Processes of manufacture

Abstract

A jet-propelled water-entry composite buffer device for multi-channel gas recycling includes a head fairing, an underwater vehicle, a buffer, a cavitator and a side fairing. The side fairing is internally provided with a fairing body and a sealing choke plate, and a high-pressure gas cavity, a transition cavity and a sub-high-pressure gas cavity are formed by the fairing body and the sealing choke plate from front to back; a quota air pressure valve is disposed on the sealing choke plate; the fairing body is provided with pressure reducing holes; the high-pressure gas cavity, the transition cavity and the sub-high-pressure gas cavity form an gas cushion buffer. Gas acceleration holes communicated with the high-pressure gas cavity are further provided in the outer wall of the side fairing, so that a supercavity can be more favorably formed after the underwater vehicle enters water.

IPC Classes  ?

• B63B 1/38 - Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers
• B63G 8/00 - Underwater vessels, e.g. submarines

Abstract

The present invention provides a robot dynamic obstacle avoidance method based on a multimodal spiking neural network. The present invention realizes a robot obstacle avoidance method in a dynamic environment by fusing laser radar data and processed event camera data and combining with the intrinsic learnable threshold of the spiking neural network for a scenario comprising dynamic obstacles. It solves the difficulty of failure of obstacle avoidance due to the difficulty in perceiving the dynamic obstacles in the obstacle avoidance task of a robot. The present invention helps the robot to fully perceive the static information and the dynamic information of the environment, uses the learnable threshold mechanism of the spiking neural network for efficient reinforcement learning training and decision making, and realizes autonomous navigation and obstacle avoidance in the dynamic environment. An event data enhanced model is combined to better adapt to the dynamic environment for obstacle avoidance.

IPC Classes  ?

• G05D 1/00 - Control of position, course, altitude, or attitude of land, water, air, or space vehicles, e.g. automatic pilot
• G05D 1/02 - Control of position or course in two dimensions
• G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks
• G06V 10/80 - Fusion, i.e. combining data from various sources at the sensor level, preprocessing level, feature extraction level or classification level
• G06V 20/58 - Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads

Abstract

The present invention belongs to the technical field of composite material processing, and relates to a hole making tool for aramid fiber-reinforced plastic and a design method thereof. The drill bit has a step reversed point angle structure, which can reduce a trust force during drilling and effectively cut off a high toughness aramid fiber, thus to improve the hole making quality of an AFRP-related component. It is proved that the new tool can significantly improve the hole making quality of an AFRP component, improve the service life and safety degree, and greatly reduce the processing cost. Therefore, the present invention has a broad application prospect in the fields of aerospace, military industries and civil application.

IPC Classes  ?

• B23P 15/32 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
• B23P 15/46 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools reaming tools

Abstract

The present application relates to a method for preparing polythioimidate on the basis of multi-component polymerization of alkyne, sulfonyl azide and thiol. The method comprises the following steps: performing a multi-component polymerization reaction on a diyne monomer, a dithiol monomer, sulfonyl azide and alkali in a reaction solvent under the action of a monovalent copper catalyst in a protective atmosphere to obtain polythioimidate. The method is simple to operate, mild in reaction condition and high in atom economy; only nitrogen byproducts are generated; the group tolerance is strong; a plurality of functional groups can be introduced into the monomers; the weight-average molecular weight of polythioimidate ranges from 4000 g/mol to 13000 g/mol; and the polythioimidate has excellent selective adsorption properties on heavy metal nickel ions (Ni2+), and has a unique application value in the aspect of enrichment of heavy metal ions.

IPC Classes  ?

• C08G 75/045 - Polythioethers from mercapto compounds or metallic derivatives thereof from mercapto compounds and unsaturated compounds
• C08G 75/30 - Polysulfonamides; Polysulfonimides

Abstract

A steady flow prediction method in a plane cascade based on a generative adversarial network is provided. Firstly, CFD simulation experimental data in the plane cascade are preprocessed, and a test dataset and a training dataset are divided from the simulation experimental data. Then, an Encoding-Forecasting network module, a deep convolutional network module and a generative adversarial network prediction model are constructed successively. Finally, prediction is conducted on test set data: the test set data is preprocessed in the same manner, and data dimensions are adjusted according to input requirements of a saved optimal prediction model; and flow field images in the plane cascade at an inlet attack angle of 10° are obtained through the prediction model. The present invention can effectively avoid the problem of limited measurement range of sensors in an axial flow compressor, and the prediction result is highly consistent with the calculation result of CFD.

IPC Classes  ?

• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]

Abstract

The present application relates to a method for selectively oxidizing styrene in water. The method comprises: adding styrene, a catalyst and an oxidizing agent to a reaction solvent, performing an oxidation reaction at 25-55°C, and filtering the resulting product after the oxidation reaction is completed, so as to obtain a filtrate, wherein the reaction solvent is water; the oxidizing agent is cumyl hydroperoxide or a hydrogen peroxide solution; and the catalyst is polymanganese porphyrin. The reaction solvent for the oxidization of styrene is water, which replaces a conventionally used organic solvent. The method is safe, inexpensive, non-toxic and pollution-free, and conforms to the modern concept of green chemistry; and the polymanganese porphyrin catalyst is used in combination with an oxidizing agent, such that a selective catalytic reaction is efficiently carried out in a water solvent. The system has short reaction time, a high conversion rate, and relatively high selectivity.

IPC Classes  ?

• C07D 301/19 - Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with organic hydroperoxides
• C07D 303/04 - Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
• C07C 45/28 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of —CHx-moieties
• C07C 47/54 - Benzaldehyde
• B01J 31/18 - Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony

Abstract

A method for evaluating a surface cleanliness oriented toward additive forging of a metal substrate employs weight coefficients corresponding to oil contaminants, particles and chips. Contamination scores of different contaminants are determined separately by different methods, and a surface cleanliness thereof is characterized in a quantitative manner by calculating the sum of the product of the weight coefficient and the contamination score of each contaminant. Further, an accurate and systematic method for evaluating a surface cleanliness employs weight coefficient of each contaminant determined based on a degree of adverse influence of the contaminant on the interface bonding of a substrate. Different detection methods are used for different contaminants. The contamination score of each contaminant is determined by the sum of the product of the weight coefficient and the contamination score of the corresponding contaminant, the comparison relationship is thus established, a cleanliness level is finally determined.

IPC Classes  ?

• G01N 21/94 - Investigating contamination, e.g. dust

Abstract

An infusion liquid heating and flow-velocity-monitoring system for clinical use is provided. The system includes a dynamic heating module, a measurement and analysis module for average velocity in infusion tubes, a velocity adjustment module, an alarming and automatic clipping module, a mobile-phone-computer remote monitoring module, an operable shared module, and a micro control module. A method of determining average velocity on a cross section of a tube according to a solution to Fourier series in a dynamic thermal dispersion equation of a steady flow in the tube is provided. Moreover, functions including monitoring infusion rate, automatic heating, monitoring whether infusion fluid in the infusion tube is empty, and automatic clipping and closing of the tube for preventing blood backflow, etc. are achieved. Lastly, specific applications developed which is connected with mobile phones by 5G network, Bluetooth and WIFI are used to display status of the infusion fluid.

IPC Classes  ?

• A61M 5/44 - Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm rests having means for cooling or heating the devices or media
• G01F 1/688 - Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element

Abstract

A multi-field auxiliary abrasive flushing and polishing method and device. The device comprises an abrasive pool, a heating device, an ultrasonic device, a peristaltic pump and a clamping table. The clamping table is mounted at the bottom of the abrasive pool, a workpiece is fixed above the clamping table, a circuitous through inner runner is provided in the workpiece, an outlet of the inner runner is in communication with a pump-in hose, a cutter handle vibration end of the ultrasonic device directly faces an inlet in the top of the inner runner, and the heating device is arranged at the top of one side of the abrasive pool. During use, firstly, a magnetic pole is mounted on a longitudinal rod of a working platform, and the inner runner of the workpiece is in communication with the pump-in hose. Secondly, a polishing solution and abrasive particles are put into the abrasive pool, a heating end of the heating device and a vibration end of the ultrasonic device are immersed in the polishing solution, and the heating device and the ultrasonic device are started. Finally, a magnetic field device is electrified and magnetized, the peristaltic pump is started, and the inner runner is polished. The present invention has a simple structure, is convenient to use and has high efficiency, and can solve the problems of a poor surface quality and a low polishing efficiency of a complex slender inner runner in a mechanical part containing the inner runner.

IPC Classes  ?

• B24B 1/04 - Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
• B24B 1/00 - Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
• B24B 31/00 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is loose; Accessories therefor
• B24B 31/12 - Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group

Abstract

An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cm−1 and below 980 cm−1.

IPC Classes  ?

• B01J 29/89 - Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium
• B01J 37/00 - Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
• B01J 37/04 - Mixing
• B01J 37/06 - Washing
• B01J 37/08 - Heat treatment
• B01J 37/10 - Heat treatment in the presence of water, e.g. steam

Abstract

The present invention relates to the technical field of cooling and lubricating of turning machining of curved surface components. Disclosed are an internal cooling system for precision turning machining and a control method. The internal cooling system comprises a hydraulic loop, an internal cooling turning tool, and an electromagnetic control system; internal cooling channels are machined inside the turning tool, and the communication between hydraulic branch loops and the internal cooling channels of the turning tool is implemented by using internal cooling sleeves; a tool cutting contact area calculation model is established, and a cutting contact state change rule in a global turning process of a curved surface component is mastered; the temperature and flow of a cooling medium of a liquid outlet of an air-cooled water chiller are set according to the material properties and cutting conditions of the curved surface component; and the on-off of an electromagnetic reversing valve is controlled by using an electromagnetic control loop, so as to adjust a conduction sequence and an action time of each hydraulic branch loop, thereby implementing localized and directional accurate cooling of a cutting tool of the curved surface component. The internal cooling system of the present invention has the capability of differential cooling of different cutting contact areas, the use efficiency of the cooling medium is improved, and the tool wear in the turning process of the curved surface component is effectively reduced.

IPC Classes  ?

• B23Q 11/10 - Arrangements for cooling or lubricating tools or work
• H01H 50/44 - Magnetic coils or windings
• B23B 27/10 - Cutting tools with special provision for cooling

Abstract

The present invention belongs to the technical field of computer vision, and provides an eye-tracking computing integrated lightweight real-time emotion analysis method. In the method, time-synchronized grayscale images and event frames are acquired on the basis of an event camera, and respectively inputted into a frame branch and an event branch; the frame branch extracts spatial features by means of a convolution operation, and the event branch extracts temporal features by means of conv-SNN blocks; the frame branch is provided with a guided attention mechanism with respect to the event branch; a fully connected layer fuses the spatial features and the temporal features, and finally the average value of n outputs from the fully connected layer is outputted to represent a final emotion expression. According to the method, emotion expressions in any stages can be recognized in multiple complex light change scenes, and testing can be performed by means of the lengths of variable-length sequences; moreover, the method has low complexity and a few calculation parameters and can be stably run on a device having limited resources; in addition, in the case of limited precision loss, the emotion recognition time is shortened, and the emotion of users can be analyzed in real time.

IPC Classes  ?

• G06V 40/16 - Human faces, e.g. facial parts, sketches or expressions
• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

For an internal cooling system for precision turning and a control method thereof, internal cooling channels are machined in turning tool, and internal cooling sleeves are used to realize the communication between each hydraulic branch circuit and internal cooling channels of turning tool; a tool contact area calculation model is established to master the change rule of the contact state in whole-domain turning process of a curved surface component; the temperature and flow rate of a cooling medium at a liquid outlet of an air-cooled water cooler are set according to the material property and cutting conditions of the curved surface component; an electromagnetic control circuit is used to control the on-off of electromagnetic directional valves, so as to adjust the conduction sequence and action time of each hydraulic branch circuit, and further realize the localized, directional and accurate cooling of a curved surface component cutting tool.

IPC Classes  ?

• B23Q 11/10 - Arrangements for cooling or lubricating tools or work
• B23B 1/00 - Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods

Abstract

The present invention relates to the technical field of medicines, and disclosed are a pair of polyketide compounds having anti-inflammatory activity, a preparation method therefor, and a use thereof. Specifically, endophytic fungus Alternaria sp. HJT-Y7 is separated and obtained from leaf parts collected from Rhodiola tibetica, the obtained endophytic fungus Alternaria sp. HJT-Y7 is subjected to solid fermentation, then two new polyketone compounds are separated and obtained by means of a series of separation and purification methods, and the two polyketone compounds both have good anti-inflammatory activity, thereby providing a new way for development of anti-inflammatory drugs.

IPC Classes  ?

• C07D 313/08 - Seven-membered rings condensed with carbocyclic rings or ring systems condensed with one six-membered ring
• A61K 31/335 - Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
• A61P 29/00 - Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• C12N 1/14 - Fungi ; Culture media therefor
• C12P 17/08 - Oxygen as only ring hetero atoms containing a hetero ring of at least seven ring members, e.g. zearalenone, macrolide aglycons
• C12R 1/645 - Fungi

Abstract

A multi-channel integrated microfluidic chip has at least two layers of channel structures. Each layer of channel structure is provided with a liquid phase input channel. One layer of channel structure is provided with a drop-maker unit and a collection channel. The liquid phase input channel has a liquid phase input port (1) and a resistance control unit (2). The drop-maker unit contains a multiphase emulsification channel (6) and a local resistance control unit (8). The collection channel has a washing channel (9), a washing phase input port (10) and a product output port (11). A method for preparing monodisperse gel microspheres is also provided.

IPC Classes  ?

• B01L 3/00 - Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers

Abstract

22 capture apparatus and method using a hydrate method. The apparatus comprises a seawater input module, a hydrating agent supply module, a hydrate nucleation module, a hydrate enhanced growth module, a hydrate slurry filtering module, a hydrate block collection module and an external electric field module. Incoming seawater and an incoming hydrating agent generate small hydrate particles under low temperature and high pressure, the small hydrate particles flow through an electric field (29) to accelerate the growth thereof and are then subjected to efficient separation, drying and compression by a hydrate solid-liquid separation chamber (39), and finally, a hydrate block is produced. The combined use of a stirring method, a spraying method and an external electric field (29) can effectively solve the problems of hydrate formation being slow and having a long cycle. The design of a hydrate solid-liquid separation chamber (39) can efficiently filter out hydrate particles and prevent the blockage of a sieve plate. Using heat exchangers (3, 24, 30) at multiple positions allows for the recycling of cold energy from a discharged waste material, thereby greatly improving the utilization efficiency and economic benefit of energy.

IPC Classes  ?

• B01D 53/62 - Carbon oxides
• B01D 53/78 - Liquid phase processes with gas-liquid contact

Abstract

Penicilliumsp.Rhodiolatibeticatibetica, performing solid fermentation on HJT-A-10, and then obtaining four new active compounds by means of a series of isolation and purification methods. The four compounds all have good anti-inflammatory activity, which provides a new way for the development of anti-inflammatory drugs.

IPC Classes  ?

• C07D 493/04 - Ortho-condensed systems
• C07D 303/22 - Ethers with hydroxy compounds containing no oxirane rings with monohydroxy compounds
• C07C 49/255 - Unsaturated compounds containing keto groups bound to acyclic carbon atoms containing ether groups, groups, groups, or groups
• C07C 45/79 - Separation; Purification; Stabilisation; Use of additives by chemisorption
• C12N 1/14 - Fungi ; Culture media therefor
• C12R 1/80 - Penicillium
• C12P 7/26 - Ketones
• A61K 31/366 - Lactones having six-membered rings, e.g. delta-lactones
• A61K 31/336 - Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having three-membered rings, e.g. oxirane, fumagillin
• A61P 29/00 - Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]

Abstract

An isogeometric sampling-based wind field interpolation simulation method, relating to the technical field of structural wind engineering. In the present invention, main steps for generating wind velocity time history comprise: firstly, inputting basic parameters of wind field simulation and the number of initial sampling points, and selecting sampling points by using an isogeometric sampling method; calculating a relative error maximum value of all frequency bands by using a defined relative error, and comparing a fit error with a given allowable error; if the fit error is greater than the allowable error, increasing the number of sampling points, and re-selecting sampling points; if the fit error is less than or equal to the allowable error, completing the selection of sampling points, and calculating, by using an interpolation function, a lower triangular matrix required for simulation; then generating a fluctuating wind field by using a harmonic superposition method. According to the present invention, interpolation points selected by isogeometric sampling have good representativeness, the statistical characteristics of the wind velocity time history obtained by combining subsequent interpolation and harmonic superposition are well simulated, and the simulation efficiency is greatly improved; moreover, the method is simple to operate and has a reasonable theoretical background.

IPC Classes  ?

• G06F 17/14 - Fourier, Walsh or analogous domain transformations
• G06F 17/16 - Matrix or vector computation
• G06F 30/13 - Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

An aero-engine surge active control system based on fuzzy controller switching is provided. The present invention selects a basic controller with the most appropriate current state for switching control according to the operating state of a compressor based on the principle of fuzzy switching, and can realize large-range, adaptive and performance-optimized surge active control. Controllers designed by the present invention realize large-range surge active control through fuzzy switching, so that the effective operating ranges of the controllers are expanded and the reliability of the controllers is improved. The designed controllers can be applied to the active control of surge caused by various causes, so that the adaptability of the controllers is improved and is closer to the actual operating condition of the engine. Some optimization indexes are added in the design process of the controllers, which can realize optimal control under corresponding optimization objectives.

IPC Classes  ?

• F02C 9/16 - Control of working fluid flow
• F04D 27/02 - Surge control
• G06N 7/02 - Computing arrangements based on specific mathematical models using fuzzy logic

Abstract

A real-time multi-parameter coordinating 3D printing auxiliary forming process for continuous fiber reinforced composites belongs to the technical field of 3D printing. The method starts an external auxiliary heating mechanism and an external auxiliary pressure mechanism timely according to the characteristics of forming materials, the structure of a forming component and interlayer pressure and temperature differences measured in real time during printing, increases interlayer forming pressure of 3D printing and reduces an interlayer temperature difference to improve interlayer bonding strength of the composites. Meanwhile, the method starts a dedicated auxiliary mechanism accompanying mechanism timely according to an established printing trajectory to ensure that the relative positions of an auxiliary mechanism and a printing device are kept unchanged in real time, to realize sustainable forming of multi-parameter coordinating 3D printing for continuous fiber reinforced composites. The method improves the interlayer bonding quality of the component.

IPC Classes  ?

• B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
• B29C 64/165 - Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
• B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

Abstract

The present disclosure provides a method for preparing multi-component polymers through post-polymerization modification, used to functionalize polysulfonyl imidate polymer including a dispersing polymer reactant, an electrophilic substitution reagent and a catalyst in an organic dispersant; adding acid-binding agent to react at room temperature for 4-48 h; obtaining the precipitate when the reaction finished; washing and drying the obtained precipitate to get the functionalized multi-component polymers. The present disclosure involves a low polymerization temperature, allowing for the reaction to occur at room temperature. Additionally, the conversion rate is high, and the applicable electrophilic substitution monomer reagents have a wide selection. Besides that, the synthesis cost of the reaction is low due to the widespread availability of common chemical reagents such as catalysts, organic dispersants, acid binding agents, and other reaction reagents. The ease of access to these raw materials contributes to the overall affordability of the synthesis process.

IPC Classes  ?

• C08G 73/00 - Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen or carbon, not provided for in groups

Abstract

A friction stir welding (FSW) tensile strength intelligent prediction method considering the welding temperature and the upsetting force. An experiment and theory combined method is adopted, an FSW experiment is carried out, shaft shoulder peripheral advancing-side and retreating-side feature point temperatures and upsetting force time series data on a surface of a weldment in a welding process are obtained by using an infrared thermal imager and a dynamometer, and a one-dimensional convolutional neural network is trained and tested by using obtained temperature data and upsetting force data, so that FSW tensile strength prediction is realized, and a reference is provided for regulation and control of the welding process.

IPC Classes  ?

• B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
• B23K 20/26 - Auxiliary equipment
• B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
• G01J 5/48 - Thermography; Techniques using wholly visual means

Abstract

A system for synchronously recovering nitrogen and carbon dioxide from boiler flue gas includes: a flue gas pretreatment system used for dehydrating and cooling boiler flue gas; a carbon and nitrogen separation system communicated with the flue gas pretreatment system, and used for performing pressure swing adsorption on the pretreated flue gas and separating the nitrogen-containing vent gas and the crude carbon dioxide gas; a carbon dioxide secondary purification system communicated with the carbon and nitrogen separation system, and used for performing secondary purification on the crude carbon dioxide gas separated from the carbon and nitrogen separation system; and a nitrogen concentration and purification system communicated with the carbon and nitrogen separation system and the carbon dioxide secondary purification system, and used for purifying the nitrogen-containing vent gas separated from the carbon and nitrogen separation system and the vent gas generated by the carbon dioxide secondary purification system.

IPC Classes  ?

• B01D 53/053 - Pressure swing adsorption with storage or buffer vessel
• B01D 53/26 - Drying gases or vapours
• B01D 53/04 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents

Abstract

Disclosed in the present invention are an offshore wind turbine complete machine transportation all-in-one ship having a wave compensation function, and a mounting method thereof. The all-in-one ship comprises a wind turbine conveyor system arranged on a ship body, a power positioning propeller system, a six-degree-of-freedom parallel mechanical arm system, and a fixed-type wind turbine foundation single pile, wherein wind turbine complete machines are fixed on the wind turbine conveyor system by means of a plurality of wind turbine stabilizing blocks, and the six-degree-of-freedom parallel mechanical arm system is provided with a clamp system. In the present invention, the wind turbine conveyor system conveys a wind turbine complete machine, the clamp system clamps the wind turbine complete machine, and the six-degree-of-freedom parallel mechanical arm system transfers same, thereby reducing operation difficulties, improving the degree of automation in a mounting process, reducing the labor cost of wind turbine mounting, lowering the operation difficulties in the mounting process, improving wind turbine mounting efficiency, and saving on engineer operation time. Therefore, the present invention can implement integral loading at a wind turbine assembly dock, complete machine transportation, and complete machine mounting, which provides convenience for the integral rapid mounting of wind turbine complete machines in offshore wind power mounting industry.

IPC Classes  ?

• B63B 75/00 - Building or assembling floating offshore structures, e.g. semi-submersible platforms, SPAR platforms or wind turbine platforms
• F03D 13/25 - Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation

Abstract

The present invention belongs to the field of friction stir welding (FSW) temperature detection, and relates to a temperature characterization method of FSW weld zone based on infrared thermal imager. The invention combines theory with experiment. A temperature field simulation model of FSW is established based on DEFORM. The data sets of temperature of surface feature points, the maximum and minimum temperatures in weld zone are obtained according to the simulation model result. Then, Support Vector Regression (SVR) is used to establish a temperature characterization model, which represents the correlation between the temperature of surface feature points and the maximum and minimum temperatures in weld zone. In the actual welding process, an infrared camera is used to measure the temperature of the surface feature point in real-time. Combined with the built temperature characterization model, the characterization of the maximum and minimum temperatures in weld zone is achieved.

IPC Classes  ?

• G01J 5/00 - Radiation pyrometry, e.g. infrared or optical thermometry
• G01J 5/48 - Thermography; Techniques using wholly visual means
• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model

Abstract

The present invention discloses a prediction method for a maximum velocity profile in a wave boundary layer based on velocity defect functions. The method overcomes the theoretical defects of the existing velocity defect functions. That is, the velocity profile in a turbulent wave boundary layer cannot be realized; and in addition, without the assumption of linear wave conditions, the method is suitable for nonlinear waves and at the same time, for a small A/k, range, and can be extended to the analysis and prediction for the maximum velocity profile under the condition that the spatial distribution of roughness elements of gravel seabed, etc. obviously affects the flow structure of the boundary layer. The present invention can be directly applied to the analysis and prediction for physical quantities/processes, such as characteristics of the wave boundary layer, stress of underwater structures, and starting and transport of submarine sediments.

IPC Classes  ?

• G01P 5/00 - Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
• G06F 17/12 - Simultaneous equations

Abstract

The present invention belongs to the technical field of energy and environment. Disclosed are a methanol hydrogen production apparatus with self-removal of CO and a method for using same. The apparatus comprises a reaction main body mechanism and a starting mechanism. The starting mechanism is an integrated reactor with a heat exchanger. The reaction main body mechanism is a vertical apparatus, is composed of a plurality of sleeve-type structures, and is sequentially provided, from inside to outside, with: a product gas outlet chamber, a reforming reaction chamber, a CO selective oxidation chamber, and an air preheating chamber. The apparatus can realize self-heating operation, requiring neither an additional heat source nor a pressurization condition. The chambers of the main body apparatus are arranged alternately and are compact in structure, and meanwhile, it can be ensured that the exchange of gas and heat is more sufficient. The energy utilization rate is improved to the maximum extent by means of the reasonable arrangement of the heat exchanger and the waste heat utilization technology.

IPC Classes  ?

• C01B 3/32 - Production of hydrogen or of gaseous mixtures containing hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
• C01B 3/58 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids including a catalytic reaction

Abstract

The present disclosure relates to the technical field of wastewater treatment, and provides a wastewater treatment method and apparatus based on hydrate-based water vapor adsorption. The apparatus includes a wastewater evaporation zone, a hydrate formation zone, a hydrate decomposition zone, and a data acquisition and control system. Rising water vapor and condensed water formed during evaporation of wastewater at normal temperature react with a hydrate former on a cooling wall surface to form a hydrate, continuous evaporation of the wastewater is promoted, the hydrate is scraped off to a collecting zone below by a scraper after being formed, and the hydrate is decomposed into fresh water, thereby realizing wastewater treatment. The present disclosure provides a method for treating complex wastewater containing a plurality of pollutants, where water vapor is consumed to form the hydrate to promote wastewater evaporation, and water obtained from the decomposition does not contain pollutants theoretically.

IPC Classes  ?

• C02F 1/04 - Treatment of water, waste water, or sewage by heating by distillation or evaporation
• B01D 1/30 - Accessories for evaporators
• B01D 5/00 - Condensation of vapours; Recovering volatile solvents by condensation
• B01D 9/00 - Crystallisation
• C02F 101/20 - Heavy metals or heavy metal compounds
• C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes

Abstract

The present disclosure provides an apparatus and a method for hydrate-based wastewater treatment and cold storage. The apparatus for hydrate-based wastewater treatment and cold storage includes a water chilling unit, a hydrate-based cold storage tank, an airflow disturbance device, a water layer positioning system, a spraying system, a suction filtration system, a heat exchange system, and a system monitoring device. The water chilling unit provides a secondary refrigerant at a low temperature. The secondary refrigerant flows through an evaporator coil in the hydrate-based cold storage tank for heat exchange. The airflow disturbance device induces hydrate nucleation. The water layer positioning system positions a contact surface between a water layer and a hydrate former after hydrate decomposition to facilitate drawing and separation of the treated upper water layer. The spraying system and the suction filtration system enhance the solid-liquid separation efficiency to improve the removal rate of pollutants.

IPC Classes  ?

• C02F 1/04 - Treatment of water, waste water, or sewage by heating by distillation or evaporation
• C02F 1/00 - Treatment of water, waste water, or sewage
• C02F 1/68 - Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water

Abstract

The disclosure discloses a method and system for adjusting user field of view (FoV) in a three-dimensional virtual reality (VR) scene. The method includes: acquiring two consecutive frames of scene pictures during a period of a user experiencing a VR scene by using a VR device; determining a projected scene flow vector on the basis of the two consecutive frames of scene pictures; generating a virtual scene graph of the two consecutive frames of scene pictures; determining a projected scene flow value of the virtual scene graph on the basis of the projected scene flow vector; determining a peripheral vision pixel of the virtual scene graph; calculating a projected scene flow average value of the peripheral vision pixel on the basis of the projected scene flow value of the virtual scene graph; and dynamically adjust a FoV of the user on the basis of the projected scene flow average value.

IPC Classes  ?

• G06T 19/00 - Manipulating 3D models or images for computer graphics

Abstract

A large gear involute artifact assembled with mandrel used as physical datum of precision traceability and measurement transmission for large gear involute is proposed. The artifact comprises a large gear involute artifact stripe, a mandrel, a backing plate, a counterweight shaft, an adjustable counterweight ring, the adjustable screws of counterweight, the connecting screws for backing plate, the connecting screws for artifact and an eccentric multi-ball bearing. The structure and the rolled length of the large gear involute artifact assembled with mandrel fit the basic requirements of class-1 accuracy in the national standard of gear involute artifact GB/T 6467-2010 in China. It has advantages of long rolled length, adjustable center of mass, uniform datum, compact structure, and portability. It adopts lightweight design, which can be installed and transported by one person manually, and is suitable for the structural design of large gear involute artifact with base-circle diameter greater than 500 mm.

IPC Classes  ?

• G01B 3/14 - Templates for checking contours
• G01B 5/20 - Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures

Abstract

A pure-rolling generating measurement method and device for gear helix artifact is proposed, which use a dividing table to accurately control the linear rail slide block assembly component to rotate according to the helix angle of different base circle. The height of the measuring point is the installation height of the working plane of generating rails, so as to ensure that the measuring point is always located on the dividing cylindrical surface of the gear helix artifact. When the gear helix artifact does pure-rolling motion, the slide block performs high-precision linear motion on the working surface of two fixed rails; the pure-rolling motion is proportional to the high-precision linear motion, so that the inductor micro-displacement probe can complete the measurement of the helix deviations of the gear helix artifact with different base circle helix angle.

IPC Classes  ?

• G01B 7/28 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures

Abstract

22 and causing no pollution to the environment. An air feeding chamber, a catalytic combustion chamber and a CO reaction chamber are interactively arranged and have a compact structure while ensuring more sufficient gas and heat exchanges. Heat exchangers are arranged at combustion tail gas outlets connected to the catalytic combustion chambers and may fully recycle waste heat in tail gases, improving an energy utilization rate to the maximum extent.

IPC Classes  ?

• B01D 53/04 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
• C01B 3/56 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids
• F23G 7/07 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of specific waste or low grade fuels, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
• F23G 5/46 - Recuperation of heat

Abstract

Provided are an engineered strain for producing cordycepin and a derivative 3'-deoxyinosine thereof, a preparation method therefor and use thereof. The preparation method comprises: ligating codon-optimized genes Cm1 and Cm2, gene amplification and isolation fragments, methanol-induced promoter and terminator fragments, and an expression vector into a gene, and transferring the gene into Pichia pastoris for screening to obtain an engineered Pichia pastoris strain. The engineered strain can be applied to the production of the cordycepin and the derivative thereof.

IPC Classes  ?

• C12P 19/40 - Nucleosides having a condensed ring system containing a six-membered ring having two nitrogen atoms in the same ring, e.g. purine nucleosides
• C12N 15/31 - Genes encoding microbial proteins, e.g. enterotoxins
• C12N 15/63 - Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression

Abstract

A tactile image super-resolution reconstruction method and acquisition system, belonging to the field of tactile sensing. The method first acquires a high-resolution tactile image sample by using a low-resolution tactile sensor, then uses a tactile super-resolution data set to train a tactile super-resolution model based on deep learning, and finally, by using the tactile super-resolution model, reconstructs a super-resolution tactile image from tactile data of a contact surface to be tested. Only using an existing taxel-based low-resolution tactile sensor, the method can effectively recover the shape of a contact surface by means of tactile super-resolution reconstruction technology based on deep learning. Thus, whilst the resolution of a tactile sensor is improved, the characteristics of the sensor, such as lightness, flexibility and easy integration to devices like a robot, can be maintained.

IPC Classes  ?

• G06T 3/40 - Scaling of a whole image or part thereof

Abstract

Disclosed are an anti-freezing protection safety alarm device for a bridge pier in water in a cold region, and an installation method. The device comprises a solar panel, a storage battery, anti-freezing devices, slings, and an alarm transmitter; each anti-freezing device comprises a suspension lug, an inner steel plate, a bottom steel plate, an outer steel plate, springs, an electric heating wire piece, a heating control switch, an alarm control switch, and silicone rubber. According to the present invention, three-level safety protection can be adaptively provided for a bridge pier depending on the deformation degrees of the anti-freezing devices; when deformation is small, an ice load is reduced by means of the good deformation capability of the devices; when deformation exceeds a certain value, a heating function is enabled to melt an ice layer to reduce the ice load; when an extreme state occurs and deformation of the devices exceeds a limit, the alarm device is triggered to ensure the safety of a bridge. The anti-freezing devices can be subjected to unit-type standardized design and manufacturing, the width size is determined according to conditions of transportation, installation and the like, the required number is determined according to the size of the bridge pier, it is flexible to use, and the adaptability is high.

IPC Classes  ?

• E01D 19/02 - Piers; Abutments

Abstract

The present invention belongs to the field of the digital twin, and relates to a digital twin framework of weld joint fatigue based on a structural stress method. The framework is divided into an off-line stage and an on-line stage, wherein the off-line stage comprises establishing a finite element model, calculating equivalent structural stress, and training an artificial intelligence algorithm; and the on-line stage comprises reading sensor data, predicted by the artificial intelligence algorithm, counting by a rainflow counting method and calculating remaining life by cumulative damage. The framework combines five methods, i.e. a finite element method, a structural stress method, the artificial intelligence algorithm, an upper envelope method, the rainflow counting method, and a Miner linear cumulative damage method. The present invention realizes visual feedback and early warning of a dangerous position of a weld joint through real-time prediction of mechanical properties and fatigue damage of the weld joint.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]

Abstract

A culture container (2) and method for blueberry cultivation. An opening cross-sectional area of the culture container (2) is greater than a bottom cross-sectional area; the bottom of the culture container (2) is provided with water discharging holes (4); the bottom of the culture container (2) is provided with a water discharging pipe (3) connected to the water discharging holes (4); the water discharging pipe (3) is connected to a liquid recovery pipeline; the upper opening of the culture container (2) is covered with a flexible film (1) having a hollow center. A cultivation nutrient solution circulation system comprises a water storage tank, a circulation pipeline, the culture container (2), the recovery pipeline, a liquid return tank, and a filtration and sterilization device. The method for cultivating blueberries by using the cultivation nutrient solution circulation system have remarkable advantages in the aspect of sunlight greenhouse potted blueberries, and the requirements for environment humidity control and plant growth amount and a fruit yield can be considered at the same time; after one-time investment, the later management costs and the continuous investment costs are low, and the present invention can be widely applied to industrial planting.

IPC Classes  ?

• A01G 31/02 - Special apparatus therefor

Abstract

The preset invention provides an energy-saving process and device for recovering C2 from refinery dry gas. The process is as follows: dry gas is cooled and then sent to a multi-stage absorption tower for treatment; the gas phase from the multi-stage absorption tower is sent to a fuel gas pipeline network or PSA unit, and the liquid phase is sent to a high-pressure flash zone for treatment; the gas phase from the high-pressure flash zone is returned to a compression section of a dry gas pretreatment system; the gas phase from the low-pressure flash zone is sent to a C2 concentrated gas compressor system; and the gas phase from the desorption tower is mixed with the gas phase obtained from the low-pressure flash zone and sent to an ethylene cracking furnace as a C2 concentrated gas product, most of the liquid phase is returned to the multi-stage absorption tower.

IPC Classes  ?

• C10G 70/04 - Working-up undefined normally gaseous mixtures obtained by processes covered by groups , , , , by physical processes

Abstract

A peridynamics-based finite element method (PeriFEM) for an structural damage analysis, comprising the following steps: A1: generating finite elements of a structure, A2: generating peridynamic elements based on the finite elements; A3: calculating a global load vector; A4: calculating a global stiffness matrix; A5: formulating and solving a linear algebra equation about the global node displacement vector; A6: evaluating whether the result satisfies the convergence criteria; if so, go to step A7, if not, return to step A4; A7: increasing the external load successively and loop A3-A7 after that, until the external load exceeds the maximum external load; A8: plotting the results. The implementation of PeriFEM in software includes the following operations: B1: generating the peridynamic elements for inputting into the software; B2: programing the formulation of the element stiffness matrix in step A4 as a subroutine; and B3: setting a method for the updating the subroutine.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]

Abstract

A seesaw-type feeding device for collecting solid materials suspended in a flow field includes a suspension assembly, a material collection assembly, a joint hinge, two anti-collision blocks and an escapement shaking assembly, wherein the latter three of which are located between the suspension assembly and the material collection assembly. The suspension assembly includes a V-shaped floating body and at least three fixed bottom anchors. The material collection assembly includes a collection pocket net, a material container, a delivery part, and an annular water discharging screen mesh. The escapement shaking assembly is located behind the V-shaped floating body and faces the material collection assembly. The material collection assembly is able to shake relatively to the fluid in the flow field, and the escapement shaking assembly drives the material collection assembly to shake.

IPC Classes  ?

• B01D 33/29 - Filters with filtering elements which move during the filtering operation the movement of the filter elements being a combination of movements
• B01D 33/72 - Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
• B01D 33/80 - Accessories
• C02F 1/40 - Devices for separating or removing fatty or oily substances or similar floating material

Abstract

The present invention relates to the technical field of mechanical transmission and provides a non-orthogonal elliptical toroidal worm gear pair, comprising an involute cylindrical gear and an elliptical toroidal worm formed by spreading a primary envelope of the involute cylindrical gear. The involute cylindrical gear and the elliptical toroidal worm are in spatial non-orthogonal transmission, and a crossed-axis angle satisfies a self-locking condition and a limiting condition of a minimum tooth crest width. A toroidal generatrix of the elliptical toroidal worm is elliptical, which can increase the number of engaged teeth and the total length of an instant contact line. The non-orthogonal elliptical toroidal worm gear pair provided in the present invention has the characteristics of toroidal worm transmission, and can achieve full-tooth-width participation of a gear in engagement transmission. In comparison with TI worm transmission of a spiral cylindrical gear, the non-orthogonal elliptical toroidal worm gear pair has the advantages of stable transmission, low noise, large bearing capacity, high transmission efficiency, remarkable error homogenization effect of multi-tooth transmission, uniform gear tooth surface abrasion, good precision retentivity, etc., can be applied to the fields of precise continuous indexing transmission, cylindrical gear tooth surface continuous grinding, etc., and has good application and popularization value and industrialization prospects.

IPC Classes  ?

• F16H 1/16 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
• F16H 55/22 - Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
• F16H 55/08 - Profiling
• G06F 30/17 - Mechanical parametric or variational design
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

A device for separating and sequestrating carbon dioxide coupled with cold storage in mixed gas via hydrate method, which belongs to the technical field of application of natural gas hydrates includes a gas compression device, a refrigeration cycle device, a hydrate formation/decomposition device, a hydrate cold storage device, a water circulation device and a sensing and monitoring device; taking the separation and sequestration of biogas as an example, the refrigeration cycle device enables the cooling of biogas, decomposition of gas at all levels, hydrate, and circulating water to provide the low-temperature conditions required for hydrate formation; the hydrate cold energy storage device can fully use the latent heat of hydrate phase change to provide the required cooling capacity on the user side; the water circulation device can realize the recycling of decomposition water to ensure the continuous formation of hydrate.

IPC Classes  ?

• B01D 53/00 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
• C01B 32/50 - Carbon dioxide
• C10L 3/10 - Working-up natural gas or synthetic natural gas

Abstract

A pre-alarming method for rotary stall of compressors based on a temporal dilated convolutional neural network includes firstly, preprocessing dynamic pressure data of an aero-engine, and dividing a test dataset and a training dataset from experimental data; secondly, constructing a temporal convolutional network module, a Resnet-v network module and a temporal dilated convolutional network prediction model in sequence, and saving an optimal prediction model. Finally, conducting real-time prediction on test data: adjusting data dimension of the test dataset according to input requirements of the temporal dilated convolutional network prediction model; calculating predicted surge probability of each sample by the temporal dilated convolutional network prediction model in chronological order; calculating real-time surge probability of a pair of samples with and without covariates by the temporal dilated convolutional network prediction model, and observing improvement action of covariates on model prediction effect.

IPC Classes  ?

• G06N 3/049 - Temporal neural networks, e.g. delay elements, oscillating neurons or pulsed inputs
• F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
• G06N 3/048 - Activation functions
• G06N 3/0455 - Auto-encoder networks; Encoder-decoder networks

Abstract

optoptoptopt, and establishing a quantitative evaluation index for the decomposition performance of a VMD algorithm. The present invention can qualitatively and quantitatively provide the optimization algorithm, which has higher-precision signal decomposition performance.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

Abstract

A method for enhancing geological storage by injecting nanoparticles to stabilize CO2 microbubbles, which belongs to the technical field of multiphase flow. The method first improves the physical properties of the fluid by pre-mixing CO2 and nanoparticles, and then the fluid is transported to the underground through high-pressure pipelines, and then CO2 microbubbles containing nanoparticles are generated through a dense perforated plate arranged by an injection well to improve the dissolution rate and sweep efficiency of the gas in the saline aquifer, so as to enhance the later mixing of the fluid. The combined injection can improve CO2 storage capacity and storage safety, and further reduce the risk of gas leakage in the reservoir.

IPC Classes  ?

• C09K 8/594 - Compositions used in combination with injected gas

Abstract

The present invention relates to the technical field of heat exchangers, and provides a heat exchanger based on a GD type hybrid minimal curved surface disturbance structure. A core body comprises a cold fluid channel and a hot fluid channel, and the channels are separated by partition plates; inlets and outlets of different channels are separated by sealing strips; the GD type hybrid minimum curved surface disturbance structure is inserted into the hot fluid channel; cold and hot fluids are distributed in a crossflow manner. The heat exchanger has the advantages of being compact in structure, light in weight, large in heat exchange area, high in heat exchange efficiency and the like; particularly, compared with the traditional G type minimal curved surface disturbance structure, application of the independently designed GD type hybrid minimal curved surface disturbance structure greatly increases the heat exchange area in a flow channel, increases the number of vortexes, realizes reasonable arrangement of the porosity, and greatly improves the heat exchange efficiency. The heat exchanger is compact, light, and efficient, and provides a new idea for solving the heat exchange problem of aviation aircrafts.

IPC Classes  ?

• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28F 9/24 - Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates

Abstract

The present invention discloses a flexible dot matrix bonding apparatus and an adaptive clamping method for a disk-type planar component. The apparatus mainly comprises three components: a substrate, connecting rods and an auxiliary support. The threaded holes in a circumferential array are uniformly distributed in the substrate, and the connecting rods are fixed at different circumferential positions of the substrate in a threaded connection manner, which play a role in bonding and supporting the disk-type planar component. The auxiliary support is matched with the substrate, so that a workpiece after turning can be taken out without damage. According to detection results of machining deformation of the disk-type planar component, the installation positions of the connecting rods on the substrate are adjusted accordingly, thus changing bonding positions of the disk-type planar component. Finally, an adaptive clamping method aiming at reducing the machining deformation of the disk-type planar component is formed.

IPC Classes  ?

• B23Q 3/06 - Work-clamping means
• B23B 25/06 - Measuring, gauging, or adjusting equipment on turning-machines for setting-on, feeding, controlling, or monitoring the cutting tools or work
• B23Q 3/08 - Work-clamping means other than mechanically-actuated

Abstract

The present invention belongs to the technical field of disaster prevention and reduction of transmission lines, and provides a quasi-static calculation method for lateral unbalanced force of transmission lines. The present invention can quantify significant unbalanced force caused by a failed tower to an adjacent tower, thus to quantitatively evaluate cascading failure risk of transmission lines. The present invention does not need a lot of iteration, and can parametrically reveal influence of various factors on unbalanced force. The present invention quantifies influence of large deformation effect of a conducting wire on wind load, and at the same time, wind load of the conducting wire is corrected by the trapezoidal equivalent wind pressure proposed, which avoids wind load calculation error of the conducting wire caused by a relatively large vertical height difference, better reflects actual mechanical state of the lines, and optimizes existing wind load calculation method of transmission lines.

IPC Classes  ?

• G01L 5/04 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
• G06F 17/11 - Complex mathematical operations for solving equations

Abstract

A pseudo-static force calculation method for power transmission line lateral imbalance force, belonging to the technical field of disaster prevention and reduction for power transmission lines. The method can quantify significant imbalance force given by a failure pylon to adjacent pylons, and then quantitatively evaluates a cascade failure risk of a power transmission line. In addition, the method does not need a large number of iterations, and can reveal influences of various factors on the imbalance force in a parameterized form. Compared with prior methods, the method quantifies an influence of a large deformation effect of a conductive wire on a wind load. Meanwhile, proposed trapezoidal equivalent wind pressure corrects the wind load of the conductive wire, thus avoiding an error in calculating the wind load of the conductive wire due to a relatively large vertical elevation difference, better reflecting an actual mechanical state of the line, and optimizing the prior power transmission line wind load calculation methods. The method is simple to implement, exhibits high analysis efficiency and precision, has a very good application prospect in the power transmission line design industry, is suitable for power transmission line analysis under various conditions, and has wide applicability.

IPC Classes  ?

• G06F 119/02 - Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]

Abstract

The present invention belongs to the technical field of aeroengine transition states, and provides a reinforcement learning-based optimization control method for an aeroengine transition state, comprising: adjusting an existing certain-type twin-spool turbofan engine model to a model suitable for invoking a reinforcement learning algorithm; in order to simultaneously satisfy high-dimensional state space and continuous action output of a real-time model, designing an Actor-Critic network model; designing a deep deterministic policy gradient (DDPG) algorithm based on an Actor-Critic framework, so as to simultaneously solve the problems of the high-dimensional state space and the continuous action output; and after the Actor-Critic framework and the DDPG algorithm are combined, performing model training; and obtaining an engine acceleration transition control rule from the training process, and controlling an engine acceleration process by applying the method.

IPC Classes  ?

• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators

Abstract

A bipolar membrane system for efficiently removing magnesium ions in salt lake brine by means of in-situ alkali production, the system comprising a cathode (1), a cathode chamber (2), an anion exchange membrane (3), an acid chamber (4), a bipolar membrane (5), an alkali chamber (6), a precipitate gathering separation net (9), an anode (8), an anode chamber (7), and an acid pickling tank (10). The salt lake brine enters the alkali chamber (6), magnesium ions and hydroxide radicals generate precipitates in the precipitate gathering separation net (9), and magnesium-removed salt lake brine is produced; pure water enters the acid chamber (4), and hydrochloric acid is then produced and enters the acid pickling tank (10); and the precipitate gathering separation net (9) is regularly transferred to the acid pickling tank (10), magnesium hydroxide is dissolved to generate a magnesium chloride solution, and the precipitate gathering separation net (9) is regenerated and then recycled. The bipolar membrane system can directly and efficiently remove magnesium ions by means of alkali production using electric energy, and is a key technical means for recycling salt lake brine with a high magnesium-lithium ratio.

IPC Classes  ?

• C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
• C02F 1/469 - Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis

Abstract

Disclosed are a leukocyte classification reagent and kit, a classification method, an erythrocyte classification reagent and kit, and an analysis method. Both the leukocyte classification reagent and the erythrocyte classification reagent comprise a fluorescent dye represented by the general formula F. The dye can stain the nucleic acids of leukocytes and erythrocytes, therefore, during blood analysis, the classification and/or counting of leukocytes in a sample can be accurately realized, and the classification and/or counting of erythrocytes in a sample can be accurately realized, in particular the identification and/or counting of RETs. In addition, the types of dyes used in blood cell analysis may also be simplified. Disclosed are a leukocyte classification reagent and kit, a classification method, an erythrocyte classification reagent and kit, and an analysis method. Both the leukocyte classification reagent and the erythrocyte classification reagent comprise a fluorescent dye represented by the general formula F. The dye can stain the nucleic acids of leukocytes and erythrocytes, therefore, during blood analysis, the classification and/or counting of leukocytes in a sample can be accurately realized, and the classification and/or counting of erythrocytes in a sample can be accurately realized, in particular the identification and/or counting of RETs. In addition, the types of dyes used in blood cell analysis may also be simplified.

IPC Classes  ?

• G01N 33/50 - Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
• G01N 33/58 - Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
• C09B 69/00 - Dyes not provided for by a single group of this subclass

Abstract

The present invention relates to the technical field of aeroengine modeling and simulation, and provides a deep autoregressive network based prediction method for stalling and surging of an axial-flow compressor. The method comprises: first using surge experiment data of a certain type of an aeroengine, selecting and preprocessing the data, and dividing the data into a training set and a test set; then building and training a deep autoregressive network model based on an attention mechanism, performing real-time prediction on the test set by using the finally trained model, and giving model loss and evaluation indexes; and finally, performing real-time prediction on test data by using a prediction model, and giving a change trend of the surge probability along with time according to a time sequence. According to the present invention, the attention mechanism is used to effectively capture the characteristics of the experimental data to accurately predict the surge probability, so that the prediction stability and accuracy can be improved; and the active control performance of the engine can be improved, and certain universality is achieved.

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

The present invention belongs to the field of monitoring technology and signal analysis of lattice tower structures, and discloses a horizontal two-dimensional displacement reconstruction method for a lattice tower structure based on multi-source heterogeneous data fusion. a lattice tower is simplified into a thin-walled three-dimensional variable section cantilever beam, a two-dimensional strain-displacement mapping method is used to calculate the horizontal two-dimensional displacement with low sampling rate, and finally a multi-rate Kalman filter algorithm is used to fuse the displacement with horizontal two-dimensional acceleration to obtain the horizontal two-dimensional displacement with high sampling rate. A data fusion method of the present invention needs less sensors, is simple in calculation process and accurate in calculation results, and has strong operability and practicability.

IPC Classes  ?

• G01M 7/02 - Vibration-testing

Abstract

The present invention belongs to the technical field of natural gas hydrates (NGHs), and provides an environmentally friendly NGH inhibitor and application. The hydrate inhibitor has a component of nisin, and further comprises chitooligosaccharide and an alcohol thermodynamic hydrate inhibitor, that can enhance the thermostability of the inhibitor and the inhibitory effect for NGHs. The optimal application conditions of the NGH inhibitor of the present invention are: temperatures of −10 to 100° C., pressures of 0.1 to 25 MPa, and a maximum subcooling degree of 12° C. The inhibitor of the present invention has good NGH inhibitory performance and certain antibacterial effects, which is a low-dose, degradable, high temperature resistant, green, environmental protective, safe and efficient NGH inhibitor, that can be used for the fields of oil-gas transportation and NGHs, and provides a new solution for field application of green natural hydrate inhibitors.

IPC Classes  ?

• C09K 8/524 - Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes

Abstract

A generating device based on friction drive for gear involute artifact with long-rolled path length by rolling method is proposes. The device includes a roller component, rail component and friction-driven component, wherein the roller component consists of a gear involute artifact with long rolled length, a mandrel, a multi-ball bearing for gear involute artifact, the base-circle plates, the parallel sleeves, a multi-ball bearing, the plain washers, the cross washers, and the locking nuts; the rail component consists of a foundation, a location baffle for base-circle plates, rails, the baffles, a location baffle for rail, copper washers, the connecting screws and the set screws of the rail; and the friction-driven component consists of a friction block, a motorized linear sliding table, a vertical sliding table, a vertical foundation and an adapter. It has good market application prospect and popularization value.

IPC Classes  ?

• B21B 1/085 - Rail sections

Abstract

The present invention discloses a simulation method for electron temperature evolution caused by an EAST tokamak radiofrequency wave. During the process of electron temperature evolution caused by injecting a numerically simulated radiofrequency wave into an EAST tokamak device, the forms of heating source are determined according to hardware parameters of a radiofrequency system, and then the evolution of the disturbed electron temperature in a given magnetic field configuration is calculated according to an electron transport equation in a tokamak configuration. The plasma resistivity is modified according to the evolved electron temperature, and the evolution of the magnetic field configuration is calculated by adopting the modified resistivity. The evolution of the disturbed electron temperature is calculated sequentially in such magnetic field configuration, and the calculation is conducted repeatedly, to achieve the simulation of long-time evolution.--

IPC Classes  ?

• G21B 1/05 - Thermonuclear fusion reactors with magnetic or electric plasma confinement
• G06F 17/13 - Differential equations
• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
• G06F 30/25 - Design optimisation, verification or simulation using particle-based methods

Abstract

The present invention belongs to the field of power system operations and provides a method for quantifying the flexibility demand and coordinating optimization of a hydro-wind-solar multi-energy complementary system. Firstly, the flexibility demand quantification method considering the uncertainty of wind and solar power output is constructed, and the wind and solar power output interval is divided by using quantile points to generate a set of output scenarios, and then the flexibility demand under each scenario is calculated. Based on the quantitative index of flexibility demand, an optimal operation model of hydro-wind-solar complementary system considering the minimum expectation of system flexibility deficiency is constructed to realize the optimal calculation of hydro-wind-solar complementary. By utilizing an actual wind-hydro complementary system of the Yunnan Power Grid, the model is validated for different new energy access ratios. The results show that the method of the present invention can give a complementary operation and scheduling scheme for multiple types of power sources under different conditions, effectively meet the flexibility demand of the system, reduce the abandoned power and improve the level of clean energy integration.

IPC Classes  ?

• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

In a method for preparing a zeolite CHA membrane, a gel conversion method is adopted to assist crystallization, seed solutions with different concentrations and sizes are successively coated on the surface of a porous support to obtain a seed layer, a synthetic gel is coated on the seed layer to obtain a gel layer, and then the porous support is subjected to a membrane crystallization reaction to obtain a zeolite CHA membrane. The method skips the conventional stage of converting the heterogeneous zeolite into the zeolite CHA seed, and directly takes a heterogeneous zeolite with the same secondary structural unit as that of zeolite CHA as a seed to directly prepare a zeolite CHA membrane on a support.

IPC Classes  ?

• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 71/02 - Inorganic material

Abstract

A styrene-maleic acid copolymerized macromolecular reactive dye, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: using styrene and maleic anhydride as copolymerization starting materials, after copolymerization, introducing a nitro group to the para-position of the hydrocarbon group on a benzene ring, reducing the nitro group into an amino group, diazotizing the amino group, and coupling with a coupling component, thereby obtaining a water-soluble macromolecular reactive dye. The prepared styrene-maleic acid copolymerized macromolecular reactive dye is low in price, high in color fixation rate on fibers, excellent in fastness, particularly high in light fastness, and suitable for industrial popularization.

IPC Classes  ?

• C08F 212/08 - Styrene
• C08F 222/08 - Maleic anhydride with vinyl aromatic monomers
• C08F 8/34 - Introducing sulfur atoms or sulfur-containing groups
• C08F 8/00 - Chemical modification by after-treatment
• C08F 8/04 - Reduction, e.g. hydrogenation
• C08F 8/30 - Introducing nitrogen atoms or nitrogen-containing groups
• C09B 56/00 - Azo dyes containing other chromophoric systems
• C09B 67/36 - Azoic dyestuff preparations
• D06P 1/02 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using azo dyes

Abstract

A forming method of a nickel aluminum (NiAl) alloy tubular part with micro flow channels including preparing a laminated tube blank. A step of fixing aluminum wires to an outer surface of the laminated tube blank to prepare a middle tube blank. A step of winding a nickel (Ni) flexible substrate and an Al flexible substrate on an outer surface of the middle tube blank to prepare a composite tube blank. A step of carrying out hot gas forming on the composite tube blank to prepare a composite tubular part. A step of carrying out in-mold first-stage reaction synthesis to make the Ni flexible substrate chemically react with the aluminum (Al) flexible substrate. A step of carrying out in-mold second-stage reaction synthesis to melt all the aluminum wires. A step of carrying out hot isostatic pressing treatment to prepare the NiAl alloy tubular part with the micro flow channels.

IPC Classes  ?

• B21C 37/08 - Making tubes with welded or soldered seams
• B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
• F16L 9/02 - Rigid pipes of metal
• F16L 9/19 - Multi-channel pipes or pipe assemblies

Abstract

A multidisciplinary structural design optimization method for a fuel assembly based on co-simulation takes the fuel assembly as a research object, and establishes a surrogate model by determining appropriate optimization design parameters with respect to the optimization requirements and low design of experiments efficiency of the fuel assembly under the working conditions of flow, solid and thermal multidisciplinary coupling. At the same time, the method combines optimization algorithms to realize the structural optimization design of a flaky fuel assembly with multiple narrow flow channels based on the characteristic of rapid optimization of ISIGHT, thereby effectively solving the problem of uneven temperature distribution of the structure. The method integrates NX, ICEM CFD, FLUENT and ABAQUS based on ISIGHT to construct a co-simulation platform, does not need to repeatedly manually set the software in multiple calculations, and can greatly save time cost while satisfying design requirements, and can shorten an optimization cycle.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• G06F 30/17 - Mechanical parametric or variational design

Abstract

The present disclosure provides a random particle generation method based on particle size distribution, which can accord with the particle size distribution characteristics of a geological structure. According to this method, random particle generation is adopted, so that a common spherical structure is avoided, and a generated particle structure is very similar to a real soil structure. Based on actual particle size distribution, particles with different particle sizes are generated by batch generation, particle seeds are generated at random pore locations, and particles are generated based on the seeds. By providing a random particle generation method based on particle size distribution, a soil structure in a form of porous media can be restored by means of simulation, which thus provides a porous medium model for the research of groundwater infiltration and fossil energy exploitation.

IPC Classes  ?

• G01N 15/02 - Investigating particle size or size distribution
• G16C 20/40 - Searching chemical structures or physicochemical data

Abstract

The present invention belong to the technical field of lattice tower structure monitoring, and discloses a displacement reconstruction method for a lattice tower structure based on improved mode superposition. The method comprises: uniformly arranging D strain sensors on main member of a lattice tower along the height, processing collected strain data {ε}D×1 using a stochastic subspace identification (SSI) method to obtain a matrix [Ψ]D×nT of first n-order strain modes; The present invention belong to the technical field of lattice tower structure monitoring, and discloses a displacement reconstruction method for a lattice tower structure based on improved mode superposition. The method comprises: uniformly arranging D strain sensors on main member of a lattice tower along the height, processing collected strain data {ε}D×1 using a stochastic subspace identification (SSI) method to obtain a matrix [Ψ]D×nT of first n-order strain modes; calculating a function relation y(x) between a distance from a measuring point to a neutral layer and a height according to a lattice tower design drawing; performing polynomial fitting on the first n-order strain modes with a height coordinate x of the lattice tower respectively to obtain a strain mode function Ψi(x), expanding a function The present invention belong to the technical field of lattice tower structure monitoring, and discloses a displacement reconstruction method for a lattice tower structure based on improved mode superposition. The method comprises: uniformly arranging D strain sensors on main member of a lattice tower along the height, processing collected strain data {ε}D×1 using a stochastic subspace identification (SSI) method to obtain a matrix [Ψ]D×nT of first n-order strain modes; calculating a function relation y(x) between a distance from a measuring point to a neutral layer and a height according to a lattice tower design drawing; performing polynomial fitting on the first n-order strain modes with a height coordinate x of the lattice tower respectively to obtain a strain mode function Ψi(x), expanding a function Ψ i ( x ) y ⁡ ( x ) The present invention belong to the technical field of lattice tower structure monitoring, and discloses a displacement reconstruction method for a lattice tower structure based on improved mode superposition. The method comprises: uniformly arranging D strain sensors on main member of a lattice tower along the height, processing collected strain data {ε}D×1 using a stochastic subspace identification (SSI) method to obtain a matrix [Ψ]D×nT of first n-order strain modes; calculating a function relation y(x) between a distance from a measuring point to a neutral layer and a height according to a lattice tower design drawing; performing polynomial fitting on the first n-order strain modes with a height coordinate x of the lattice tower respectively to obtain a strain mode function Ψi(x), expanding a function Ψ i ( x ) y ⁡ ( x ) according to a Taylor formula, performing double integration on the expansion result and substituting same into a boundary condition, to obtain a displacement mode function Φi(x); evaluating a modal coordinate {q}n×1 by means of the least square method, substituting the height coordinate x of a displacement object point to be reconstructed, and multiplying the displacement mode function value Φi(x) by the modal coordinate {q}n×1. The improved mode superposition method of the present invention has the advantages of a small number of sensors required, simple calculation process, accurate calculation result, and strong operability and practicality.

IPC Classes  ?

• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings

Abstract

A correction method and system for a thin-walled cylindrical shell model, relating to the technical field of analysis and design of a main bearing member in an aeronautic/astronautic structure. In the method, the influence of a fine feature structure in an astronautic cylindrical shell structure on the rigidity and mass is equivalently transferred to a skin and a stiffener, and then the influence of the fine feature structure on the overall structural bearing capacity is simulated. The influence of the fine feature structure such as a chamfer on the structural mass and rigidity is fully considered, a simulation model is updated by means of a homogenization-based optimization algorithm, and a structural behavior, a local buckling behavior, and a post-buckling behavior of a grid stiffened cylinder when a material exceeds the yield limit and enters a plastic stage can be accurately simulated. The analysis precision of an entity model method and the analysis efficiency of a shell model are both achieved, and the problem of high computational costs in a fine and lightweight design of complex thin-walled structures in carrier rockets is solved.

IPC Classes  ?

• G06F 30/15 - Vehicle, aircraft or watercraft design

Abstract

A method for preparing a combination adjuvant is based on carboxyl modified aluminum oxyhydroxide nanoparticles. The preparation method uses carboxylated hydroxyl oxide nanoparticles as a carrier, but is not limited to the role of a carrier. The carboxylated hydroxyl oxide nanoparticles are combined with a novel CpG-ODN adjuvant, such that the half-life period of a CpG adjuvant is prolonged. The combination of adjuvants shows a synergistic effect, such that the Th2 type immune stimulation ability is enhanced, and the possibility of Th1 type immunity is also given to the adjuvant.

IPC Classes  ?

• A61K 39/39 - Medicinal preparations containing antigens or antibodies characterised by the immunostimulating additives, e.g. chemical adjuvants

Abstract

A finite time speed control method for a permanent magnet synchronous motor (PMSM) based on a fast integral terminal sliding mode and disturbance estimation comprises: firstly, determining a mathematical model of a speed loop of the PMSM under the influence of system parameters uncertainty and unknown load torque; secondly, designing an improved fast integral terminal sliding surface on the basis of the idea of terminal sliding mode control; then, proposing a disturbance estimation method based on an adaptive fuzzy system with respect to the disturbance in a PMSM system; designing a PMSM speed controller on this basis; and finally, completing the concrete implementation of the whole technical solution. The present invention designs the fast integral terminal sliding surface and a sliding mode control law to ensure that a motor speed tracking error converges to zero within finite time and enhances the rapidity of a PMSM speed regulating system.

IPC Classes  ?

• H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
• H02P 25/022 - Synchronous motors
• H02P 21/18 - Estimation of position or speed