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147results about How to "Simulation is accurate" patented technology

Server test environment guarantee method and system based on dynamic simulation

PendingCN121785869Aflexible constructionFlexible and dynamic managementVolume/mass flow measurementHardware monitoringServerComputer engineering
The invention discloses a server test environment guarantee method and system based on dynamic simulation, a storage medium and computer equipment. The method comprises the steps that the air inlet temperature, real-time power consumption and heat dissipation strategy signals of a tested server and the actual environment temperature of an incubator are collected in real time; dynamically setting the temperature of the air inlet of the tested server as the target environment temperature of the incubator, and calculating the real-time temperature deviation between the actual environment temperature and the target environment temperature; if the real-time temperature deviation exceeds a preset threshold value, a dynamic PID control algorithm is triggered, a basic control quantity is obtained through calculation according to the real-time temperature deviation through the dynamic PID control algorithm, a dynamic compensation quantity is obtained through calculation according to the target environment temperature, the real-time power consumption and the heat dissipation strategy signal, and the heat dissipation strategy signal is obtained based on the basic control quantity and the dynamic compensation quantity. Generating a temperature control instruction of the incubator; according to the temperature control instruction, a refrigerating or heating device of the incubator is dynamically adjusted so as to guarantee the test environment of the tested server.
Owner:NINGCHANG INFORMATION TECH (HANGZHOU) CO LTD

A ship vibration isolation device vibration isolation calculation method based on vibration isolator type spectrum data

PendingCN122286950Aavoid resonanceImprove the vibration isolation effectElement modelIsolator
This application discloses a method for calculating the vibration isolation of ship vibration isolation devices based on isolator type spectrum data, relating to the field of ship vibration isolation design. The method includes: acquiring the type spectrum data and impedance test data of the target isolator; determining the stiffness and damping parameters of the target isolator based on the type spectrum data and impedance test data; constructing a finite element model of the ship vibration isolation device; inputting the stiffness and damping parameters of the target isolator into the finite element model for calculation, and obtaining the vibration isolation calculation results of the target isolator. This method can efficiently utilize isolator type spectrum data to conduct vibration isolation calculation and evaluation of ship vibration isolation devices during the ship design phase, avoiding resonance between the natural frequency of the vibration isolation device and the excitation frequency of the equipment, and improving the vibration isolation effect.
Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER

Face key point detection network training method, face key point detection method and medium

The invention discloses a face key point detection network training method, a face key point detection method and a medium, and belongs to the technical field of face key point detection, and the method comprises the steps: obtaining a face image data set; in the face image data set, each sample is a face image marked with key point coordinates; for each sample in the face image data set, key points in the sample are divided into boundary endpoints and boundary internal points, and coordinates of the key points are converted to a heat map coordinate system; under the heat map coordinate system, generating a true value heat map for each boundary endpoint by adopting isotropic Gaussian distribution, generating a true value heat map for each boundary internal point by adopting anisotropic Gaussian distribution, and forming a training data set by the face image and the true value heat map of each key point in the face image; and training a face key point detection network used for predicting a heat map of each key point in the face image by using the training data set to obtain a trained face key point detection network. According to the invention, the detection precision of the face key points can be effectively improved.
Owner:HUAZHONG UNIV OF SCI & TECH

A method and system for real-time rendering of physically simulated volumetric clouds

This invention discloses a real-time rendering method and system for physically simulated volumetric clouds. The method includes the following steps: constructing a dynamic noise mixing model, and constructing complex cloud layers by mixing multiple noises based on the dynamic noise mixing model; constructing a multi-scattering illumination model, and using the multi-scattering illumination model to perform single-scattering calculations and multi-scattering approximations on the complex cloud layers to simulate illumination; based on the completed illumination simulation, dividing the cloud density field of the complex cloud layers into several voxel blocks, and performing adaptive light travel processing to complete the real-time rendering of volumetric clouds. This invention, without sacrificing image quality and rendering efficiency, integrates advanced cloud modeling theory with efficient GPU acceleration technology, and uses a mixed noise model to generate diverse cloud structures, accurately reproducing various typical cloud types such as high-altitude cirrus clouds, cumulus clouds, and stratus clouds.
Owner:北京渲光科技有限公司 +1

Capsule type oxygen cabin for animal experiment

The invention relates to a capsule type oxygen cabin for animal experiments, which adopts a modular structure, comprehensively considers the influence of multiple factors such as temperature, humidity, pressure and oxygen concentration, and also considers the influence of breathing oxygen consumption of experimental animals and the influence of a first / second accommodating part, and on the basis, the first / second accommodating part is centrally controlled through a touch screen; according to the method, the combination of multiple modes can be realized, so that the climate conditions of different regions can be accurately, efficiently and stably simulated, and accurate and scientific guidance can be provided for the research on'high reflection ', the work and life of personnel in high and cold climate regions and the pathology research of hospitals. Besides, the electrical parts are classified and placed in the first accommodating part, the second accommodating part, the touch screen and the bearing part, so that the cabin body can be transparent and visual, and the electrical parts in the first accommodating part and the second accommodating part are convenient to overhaul through detachable connection between the first partition plate and the second partition plate and the first accommodating part and between the first partition plate and the second partition plate and the second accommodating part.
Owner:CHINESE PEOPLES LIBERATION ARMY XINJIANG MILITARY REGION GENERAL HOSPITAL

Methods, apparatuses, and media for layout processing

According to embodiments of this disclosure, a method, apparatus, and medium for pattern processing are provided. In the method, parameter information related to a lithography machine and a wafer in a lithography process is acquired. The lithography machine is used to form a wafer pattern on the wafer based on a target pattern. Based on the parameter information, a target state representation corresponding to the target pattern is determined from a plurality of candidate state representations indicating the electron beam scattering state. Based on the target state representation, a correction result for the target pattern is determined. In this manner, the state representation of the electron beam scattering state corresponding to the target pattern can be determined based on the parameter information of the lithography machine used and the parameter information of the wafer used for lithography, thereby simulating the lithography process more accurately. This ensures that the state representation used for lithography process simulation can more accurately describe the scattering state of the electron beam used by the lithography machine, improving the reliability of the simulation process and thus more accurately determining the correction result for the target pattern.
Owner:QUANXIN INTELLIGENT MFG TECH CO LTD

Bioactive bionic gradient hydrogel as well as preparation method and application thereof

The invention relates to the technical field of hydrogel, in particular to bioactive bionic gradient hydrogel as well as a preparation method and application thereof.The preparation method comprises the following steps: dissolving quaternary ammonium salt chitosan, 3-acrylamidophenylboronic acid, platelet-rich plasma and phenyl (2, 4, 6-trimethylbenzoyl) lithium phosphate in deionized water, stirring until complete dissolution, centrifuging, and drying to obtain a hydrogel solution containing chitosan, 3-acrylamidophenylboronic acid, platelet-rich plasma and phenyl (2, 4, 6-trimethylbenzoyl) lithium phosphate; pre-polymerization liquid is obtained; preparing a tannic acid-iron ion (TA-Fe < 3 + >) mixed solution; adding the pre-polymerized liquid into a mold, and carrying out ultraviolet radiation crosslinking to obtain hydrogel; the hydrogel part is soaked in a tannic acid-iron ion mixed solution, and the gradient hydrogel is obtained. According to the biologically active bionic gradient hydrogel as well as the preparation method and the application thereof, the dual-network hydrogel is soaked in a TA-Fe < 3 + > solution to form a TA-Fe < 3 + > coordinated concentration gradient, so that the hard-to-soft mechanical gradient of tissues such as bone-cartilage, rotator cuff, achilles tendon and the like is accurately simulated.
Owner:NINGBO UNIV

A fast charging numerical simulation method, device and medium for a thick electrode of a lithium ion battery

PendingCN122508918Arelatively small errorSimulation is accurate
The present application relates to the technical field of electrochemistry, and in particular to a fast-charging numerical simulation method, device and medium for thick electrodes of lithium ion batteries, the method comprising: constructing an electrochemical model of a lithium ion battery based on a pseudo two-dimensional model; loading basic parameters of the lithium ion battery, spatially discretizing according to the battery structure, and initializing an array of physical quantities required for simulation; using a Bayesian optimization algorithm, determining the charge-discharge curve of the lithium ion battery based on experiments, and calibrating the kinetic parameters of the battery cell; switching the charge-discharge mode according to the state of the lithium ion battery, performing cycle simulation, outputting simulation data, and completing fast-charging numerical simulation. The method overcomes the problems of the prior art, such as the inability of the pseudo two-dimensional model to accurately simulate the low-temperature fast-charging process of thick electrodes, the lack of an efficient and accurate method for obtaining kinetic parameters, and the difficulty in predicting battery aging caused by SEI growth.
Owner:CENT SOUTH UNIV +1

Hydroelectric generating set bolt state dynamic monitoring method and system

The present application relates to the technical field of hydroelectric generating set bolt monitoring, and particularly relates to a hydroelectric generating set bolt state dynamic monitoring method and system. The method comprises the following steps: performing resonance frequency prediction on the bolt, and performing adaptive resonance excitation to obtain a bolt resonance characteristic spectrum; performing bolt acoustic signal collection according to the bolt resonance characteristic spectrum to obtain a multi-channel original acoustic waveform set; performing working condition noise preprocessing on the multi-channel original acoustic waveform set to obtain an acoustic propagation time-domain-frequency domain matrix; performing multi-dimensional stress state mapping analysis according to the acoustic propagation time-domain-frequency domain matrix, and performing bolt loosening state recognition to obtain a bolt structure stress distribution atlas; and performing multi-source heterogeneous data fusion and edge computing according to the bolt structure stress distribution atlas to obtain a connection reliability index. The present application realizes high-precision, real-time and online monitoring of the bolt state through acoustic characteristic change analysis under a complex stress state.
Owner:GUIZHOU WUJIANG HYDROPOWER DEV

A method for simulating buckling of subsea pipelines based on the pipeline element method

This invention provides a method for simulating buckling of subsea pipelines based on the pipeline element method, addressing the problems of low computational efficiency, complex modeling, and low accuracy in existing methods. Based on Euler-Bernoulli beam theory, this invention models the pipeline as a series of efficient pipeline elements. Internal pressure is converted into equivalent temperature rise, and the effective thermal expansion force generated by the effective temperature rise is applied to both ends of the pipeline element to construct the total potential energy equation. The second derivative of the total potential energy equation is performed to obtain the tangent stiffness matrix of the pipeline element. An updated Lagrange method is used for coordinate transformation. The secant relationship is used to calculate the pipeline element and soil resistance. A Newton-Raphson incremental-iterative numerical program is established to perform nonlinear analysis of the pipeline, progressively solving for the deformation and stress of the pipeline under complex loads. This invention significantly reduces the number of elements, improves computational efficiency, and accurately simulates nonlinear pipe-soil interactions. It is applicable to various pipelines, including short pipes, long pipes, and corroded pipes, as well as complex working conditions such as high temperature and high pressure.
Owner:SUN YAT SEN UNIV +1

Testing machine for simulating washing of washable ultraviolet-proof fabric

The utility model discloses a washing test machine for simulating washable ultraviolet-proof fabric, and particularly relates to the technical field of fabric detection, the washing test machine comprises a case, a partition plate is arranged in the case, a washing bin is arranged on one side of the partition plate, a machine bin is arranged on the other side of the partition plate, a containing assembly is mounted on the partition plate, and the containing assembly is arranged on the machine bin. A heating plate is arranged at the bottom end of the interior of the washing bin and connected with a heater arranged in the machine bin, a temperature sensor is installed in the middle of one side of the partition plate, a water level sensor is arranged above the temperature sensor, a water inlet is formed in the partition plate and connected with a water pump arranged in the machine bin, and a water outlet is formed in the water pump. A water drainage pipe is arranged at the bottom of the washing bin, supporting legs are installed at the bottom end of the machine box, an upper cover is hinged to the top end of the machine box, a lock catch is arranged between the upper cover and the machine box in a matched mode, and a sealing gasket is arranged at the connecting position of the upper cover and the top face of the washing bin. The water washing device has the advantages of being capable of improving the water washing effect, convenient to operate and observe, stable in water flow and capable of improving the detection efficiency.
Owner:CHANGZHOU ABUNU CLOTHING TECHNOLOGY CO LTD

Experimental simulation system and method for core burr fault characteristics of oil-immersed transformer

The invention discloses an experimental simulation system for core burr fault characteristics of an oil-immersed transformer, and the system constructs a two-dimensional axisymmetric simulation model of the transformer, sets a simulated core burr defect, and obtains electric field distribution data and voltage distribution data under a normal working condition and the simulated core burr defect through finite element simulation; a corresponding simulated iron core burr defect is arranged in an oil-immersed transformer entity, a transformer no-load test is carried out on the oil-immersed transformer entity, a partial discharge signal is obtained through partial discharge detection equipment, and the electric field distribution data and the voltage distribution data are combined through the partial discharge signal to determine the core burr defect of the oil-immersed transformer entity. And evaluating to obtain the damage degree of the burr defect of the simulated iron core. According to the invention, the diagnosis accuracy and controllability of the burr defect of the iron core of the oil-immersed transformer are improved.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +3

Accident Rescue Risk Early Warning Method and System Based on Real-Time Calculation

This invention discloses a method and system for accident rescue risk early warning based on real-time calculation. The method includes: when a collapse accident occurs and rescue is required, acquiring surrounding rock parameters, collapse body parameters, and a expected rescue plan; constructing a finite element model based on the surrounding rock parameters, collapse body parameters, and expected rescue plan, and using the excavation advance of the expected rescue plan as the calculation advance; loading a seepage model onto the finite element model based on the expected groundwater level and initializing the steady-state seepage field, and then performing excavation simulation calculations through the finite element model; performing excavation simulation calculations in each round using the calculation advance; conducting rescue operations according to the expected rescue plan, and adjusting and recalculating the parameters of the finite element model and seepage model based on data detected during the rescue operation; when the calculation result of the finite element model exceeds the warning value, determining that there is a risk in the current rescue operation.
Owner:CHINA RAILWAY SECOND BUREAU GROUP CO LTD RESCUE BRANCH +3

Casting liquid fluidity experiment device and method

The invention relates to the technical field of investment casting, in particular to a casting liquid fluidity experiment device and method. The casting liquid fluidity experiment device comprises a pouring cup, a main pouring gate, a bent pouring gate, a bottom pouring transverse pouring gate and a bottom pouring test plate. The first end part of the main pouring gate is communicated with the pouring cup; one end of the bent pouring gate is communicated with the bypass position of the main pouring gate; one end of the bottom pouring cross gate is communicated with the second end part of the main pouring gate; the interior of the bottom pouring test plate is hollow; one end, far away from the main pouring gate, of the bottom pouring cross gate is communicated with the bottom pouring test plate; the extension direction of the bottom pouring test plate is intersected with the extension direction of the bottom pouring cross gate; the bottom pouring test plate and the bent pouring gate are positioned on the same side of the bottom pouring cross gate; the cross section of the bottom pouring test plate is rectangular; the extension length of the bent pouring gate is greater than that of the bottom pouring test plate; in this way, the problems that in the prior art, casting liquid fluidity testing is single, and evaluation is not comprehensive enough are solved.
Owner:SHENYANG RES INST OF FOUNDRY

Chips, devices, and methods for simulating shale fracturing, seepage absorption, and huff-and-puff extraction.

This invention provides a chip, device, and method for simulating shale fracturing, seepage, and extraction processes, belonging to the field of oil reservoir development technology. The chip includes: a substrate and a cover plate arranged in an overlapping manner. A main channel is etched on the substrate, and secondary fractures and pore throat structures are located on one side of and connected to the main channel. The secondary fractures are located within the pore throat structure region. The etching depth of the main channel and the secondary fractures is the same, and greater than the etching depth of the pore throat structure region. This invention has a simple structure and can accurately and comprehensively simulate the shale fracturing, seepage, and extraction processes with high data accuracy, providing data support for shale fracturing, seepage, and extraction processes.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Simulation analysis method for aircraft landing gear tire under heavy landing impact load

The application discloses a simulation analysis method for an aircraft landing gear tire under heavy landing impact load, and relates to the technical field of aeronautical engineering and computational mechanics. First, in the tread and sidewall rubber area, the micro-heterogeneity of the rubber material in the tire is equivalent to the super-elastic mechanical behavior of the macro-continuous medium based on the homogenization theory. This process avoids the extremely dense mesh and complex constitutive relationship required for depicting the micro-features such as filler distribution and interface effect in the traditional model. Then, the rebar element representing force transmission under impact load is created in the pre-constructed rubber matrix grid, and the rebar element is coupled with the rubber matrix. The simplified coupled model can accurately capture the anisotropic stiffness, main force transmission path and reinforcement effect of the cord-rubber composite structure, so as to finally stably and accurately simulate the transient impact process of the tire under heavy landing impact load, which includes the triple nonlinearity of geometry, material and contact.
Owner:XI AN JIAOTONG UNIV

Hydrological simulation method and system based on space-ground-air integrated monitoring in frozen soil mountainous area

The present disclosure provides a permafrost mountainous hydrological simulation method and system based on space-ground-air integrated monitoring, relating to the technical field of hydro-meteorological monitoring and water resources forecasting. The method comprises: obtaining permafrost hydrological monitoring data of a permafrost region through space-ground-air multi-monitoring equipment; the permafrost hydrological monitoring data comprises permafrost state and precipitation data; assimilating the permafrost hydrological monitoring data into a distributed hydrological model coupled with a permafrost runoff generation process to obtain a first distributed hydrological model; simulating runoff processes under different permafrost states and permafrost underlying surface hydrological characteristics through the first distributed hydrological model to dynamically quantify precipitation-runoff conversion efficiency. The present scheme can accurately simulate the runoff process in the permafrost region, and then reliably dynamically quantify the precipitation-runoff conversion efficiency.
Owner:NORTHWEST ENGINEERING CORPORATION LIMITED +1

Apparatus and method for testing duration of black ice and coagulation strength on phase change asphalt pavement

The application provides a device and method for testing the duration and coagulation strength of black ice on a phase change asphalt pavement, and belongs to the technical field of road surface anti-icing performance testing technology. The device comprises a pressure head unit, a water tank unit and a collection unit. The pressure head unit comprises a hollow circular tube, a concentric variable-diameter special-shaped tube, a circular sheet, a steel ball, a circular rod, a cylinder and a spring. The water tank unit comprises a fan-shaped water tank, a plastic film, a screw, a level and a horizontal adjustment foot with a screw rod. The collection unit comprises an electric conductivity meter and a pressure gauge. The test method of the application is as follows: a freeze-thaw test is carried out on the phase change asphalt mixture with different thicknesses of water film on the bottom surface, the coagulation time, melting time and duration of black ice with different thicknesses are tested from the electric conductivity-time curve, and the coagulation strength of black ice with different thicknesses is tested by pressing the black ice with different thicknesses to break.
Owner:HOHAI UNIV +1

A method for determining the size of a test model for a pulse wind tunnel

This invention provides a method for determining the size of a pulse wind tunnel test model, comprising: determining the flow field of the nozzle and test section using numerical simulation to obtain a uniform flow field region S1 in the wind tunnel; then calibrating the uniform flow field region S2 of the nozzle and test section using a cross-shaped frame, comparing the sizes of the two uniform flow fields S1 and S2, and selecting the smaller uniform flow field region S0 as the uniform flow field region S0; scaling down the selected model under the condition of maximum test angle, with the maximum projected area M1 of the model in the direction perpendicular to the airflow occupying 60% to 65% of the cross-sectional area of ​​the uniform flow field S0; integrating the scaled-down model with the nozzle and test section into a single model, numerically simulating the entire flow process under the condition of maximum angle of attack and / or sideslip angle test angle, redetermining the model scale based on the model installation position, the shock wave position at the leading edge of the model, and the coverage of the uniform flow field, and determining the upper limit of the model length through the effective test time and the velocity of the flow field in the test section.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS

Network pressure interruption simulation device, method, storage medium and electronic device

ActiveCN116819387BSimulation is accurateSolve the problem of long turn-on and turn-off delay
The application discloses a network voltage interruption simulation device and method, a storage medium and an electronic device. The device comprises: a fast mechanical switch branch connected to a power supply at one end and to an input end of a measured device at the other end; an electronic switch buffer energy absorption branch connected in parallel with the fast mechanical switch branch and provided with an electronic switch, used for diverting and shutting off loop current; and a control unit in communication with an upper computer, the fast mechanical switch and the electronic switch respectively, used for controlling interruption of the fast mechanical switch and the electronic switch according to a control instruction of the upper computer. The device solves the problems of long opening and shutting off delay and poor controllability of a parallel mechanical contactor, can accurately simulate network voltage interruption working conditions with different time lengths, has low on-state loss, small temperature rise, small volume and light weight, can quickly protect a test system and a measured converter device, makes a network voltage interruption test more convenient and fast, and further improves the safety and reliability of the test system.
Owner:CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO LTD

Simulated water for testing ultrafiltration water purifier as well as preparation method and application of simulated water

The invention provides simulated water for testing an ultrafiltration water purifier as well as a preparation method and application of the simulated water. The simulated water for testing the ultrafiltration water purifier comprises test water, escherichia coli, humic acid, montmorillonite, aluminum hydroxide and aluminum sulfate. The concentration of montmorillonite in the simulated water for testing the ultrafiltration water purifier is 0.5-2g / L. The preparation method of the simulated water for testing the ultrafiltration water purifier is simple to operate, the bacterial solution, the humic acid stock solution, the montmorillonite stock solution, the aluminum hydroxide stock solution and the aluminum sulfate are mixed with the test water to prepare the simulated water containing colloids, organic matters and bacteria, and the water quality of various tap water can be accurately simulated; the method can be used for evaluating and testing the performance of the ultrafiltration water purifier filter element, field water taking testing is not needed, and the filter element testing cost is reduced.
Owner:QINGDAO HAIER STRAUSS WATER EQUIP CO LTD +1

Multi-point patrolling method, system and device

The invention belongs to the technical field of flue gas monitoring, and provides a multipoint patrolling method, system and device. The method comprises the following steps of adaptive sampling and preprocessing, distributed full-dimensional self-diagnosis and fault early warning, fault root cause mining and processing, LIBS spectral analysis and 4D pollution diffusion model construction, environment-data dual-drive dynamic calibration mechanism and data fusion and collaborative analysis. According to the method, LIBS spectral analysis and a CFD model are coupled to construct a 4D pollution diffusion model, and an environment-data dual-drive dynamic calibration mechanism is combined, so that accurate simulation and prediction of a pollution diffusion rule are realized; through space fusion and time trend prediction, a scientific basis is provided for pollution source responsibility division and emission reduction decision, adaptive sampling, multi-modal fault diagnosis and dynamic pollution modeling are integrated, closed-loop and environment-data dual-drive dynamic calibration from data acquisition to decision support is achieved, limitation of a traditional static model is broken through, multi-dimensional collaborative decision support is achieved, and the method is suitable for large-scale popularization and application. And a landing emission reduction scheme is provided.
Owner:HUADIAN QINGDAO POWER GENERATION COMPANY +1

A power system planning method and device considering wind turbine wake effect, a terminal device and a storage medium

ActiveCN120671967Bimprove accuracyReduce planning deviations
This invention discloses a power system planning method, apparatus, terminal equipment, and storage medium that considers the wake effect of wind turbines. Belonging to the field of power systems, the method includes: predicting forecast meteorological data and forecast load data for the target planning period based on historical meteorological data, historical load data, and preset maximum and minimum temperature thresholds; determining the wake influence area of ​​the wind turbines and the predicted wind speed at each wind turbine based on wind turbine coordinates, forecast meteorological data, and wind turbine parameters; correcting the predicted wind speed at each wind turbine based on a wind turbine wake obstruction logic matrix constructed from the wake influence area and wind turbine parameters, wind turbine parameters, and ground roughness; and planning the power system to be planned based on the wind farm output and forecast load data for the target planning period calculated using the corrected wind speed, forecast meteorological data, and wind turbine parameters. By implementing this invention, the problem of deviations in power system planning due to wind turbine wake effects is solved.
Owner:GUANGDONG POWER GRID CO LTD

An inversion analysis method of tensile softening constitutive model of quasi-brittle materials under monotonic loading

ActiveCN121720855BDistinguish mechanical behaviorAvoid the difficulty of taking into account the mechanical properties of different stagesMaterial strength using tensile/compressive forcesMaterial strength using steady bending forcesCrazingNumerical models
The application relates to the technical field of quasi-brittle material mechanical property testing and constitutive inversion, in particular to an inversion analysis method of a quasi-brittle material tensile softening constitutive under monotonic loading, which comprises the following steps: collecting unilateral notched beam specimen size parameters and monotonic loading three-point bending test data; establishing a two-dimensional numerical model comprising an undamaged area and a cohesive crack area; constructing a segmented linear tensile softening constitutive subroutine comprising an elastic stage and a softening stage; integrating the two-dimensional numerical model and the subroutine, iteratively inverting constitutive parameters through an optimization algorithm, and outputting a final segmented linear tensile softening constitutive after the simulation data and the test data reach a preset fitting degree. The method can improve the constitutive inversion accuracy, adapt to the nonlinear fracture characteristics of quasi-brittle materials, and provide reliable support for material performance evaluation.
Owner:GUIZHOU UNIVERSITY OF FINANCE AND ECONOMICS

Grouting coupling simulation method and system based on diffusion model and time-varying rheology

The invention discloses a grouting coupling simulation method and system based on a diffusion model and time-varying rheology, and relates to the technical field of geotechnical engineering grouting numerical simulation. Current geological data are input into the diffusion model to generate grouting initial parameters; automatically identifying and dividing a plurality of solidification stages of the slurry based on the multi-source sensing data; based on a stage division result, performing dynamic inversion and analysis on parameters in the time-varying rheological constitutive equation of the slurry to obtain time-varying rheological parameters, and coupling the time-varying rheological parameters to a constitutive relation of a multi-physics field coupling control equation set in real time; and when the slurry density of a certain area in the computational domain is lower than a critical density threshold value, activating the fluid model for solving, when the slurry density reaches or exceeds the critical density threshold value, switching the area to a solid mechanical model for solving, and dynamically optimizing grouting parameters based on a reinforcement learning algorithm. Simulation parameters and a calculation model are dynamically adjusted through an AI system, and continuous and accurate simulation of the whole process of slurry from liquid pouring to solid phase change is achieved.
Owner:SHANDONG UNIV OF SCI & TECH

Special equipment for testing ignition temperature of A2L hot surface

The utility model discloses an A2L hot surface ignition temperature test special device, which comprises a test box and a spraying type pipe arranged in the test box, the surface of one end of the spraying type pipe is fixedly connected with a refrigerant tank with a valve, one side of the refrigerant tank is provided with the valve which is communicated with the interior of the refrigerant tank through the spraying type pipe, and the other side of the refrigerant tank is provided with the spraying type pipe. A glass barrel is arranged on the peripheral side, close to one end, of the spraying type pipe, a metal disc is fixedly installed on the surface of the lower end of the glass barrel, a thermocouple is fixedly installed on the surface of one side of the metal disc, a heat insulation pad is fixedly connected to the peripheral side surface of the metal disc, and one side, extending to the heat insulation pad, of one end of the metal disc is fixedly connected with a heating plate; according to the utility model, through the arrangement of the spraying type pipe, stable conveying and controlled release of the refrigerant can be realized, the refrigerant can be accurately sprayed on the metal disc, and the refrigerant is fully contacted with the hot surface, so that the ignition temperature of the hot surface is tested, and the effect of accurate test result is achieved.
Owner:CQC INTIME TESTING TECH CO LTD

A fast simulation method of ion scattering track clusters driven by a bypass factor

ActiveCN121641473Breduced simulation timeSatisfy real-timeMedical simulationParticle physicsLookup table
The application discloses a kind of fast simulation method of ion scattering track cluster driven by bypass factor, including constructing basic radiation parameter table;According to the basic radiation parameter table, search discrete energy point, form lookup table;According to the variation of bypass factor of each discrete energy point in lookup table, determine the scattering angle distribution characteristic parameter corresponding to discrete energy point, and generate scattering angle sample based on scattering angle distribution characteristic parameter and store in scattering angle sample pool;Initialize three-dimensional grid, set the initial position and direction of incident ion;Carry out incident ion transport and energy deposition cycle;Parallel execution of the simulation task of multiple incident ions, respectively in independent three-dimensional grid copy incident ion transport and energy deposition cycle, finally all three-dimensional grid copy is obtained Total dose distribution.This method achieves optimal balance between calculation efficiency and accuracy, so as to generate high-fidelity three-dimensional dose distribution chart.
Owner:NANJING UNIV OF INFORMATION SCI & TECH +1

Method for inversion of aluminum reduction cell damage based on machine learning algorithms

The present application relates to the technical field of aluminum electrolysis, and provides an aluminum electrolysis cell damage inversion method based on a machine learning algorithm, comprising the following steps: obtaining current data of an aluminum electrolysis cell through a fiber-optic current sensor, and obtaining temperature data of the aluminum electrolysis cell; performing discharge area division according to a discharger of the aluminum electrolysis cell; performing area division on the current data and the temperature data, and performing feature extraction on the current data and the temperature data; establishing a physical information forward model based on a neural network, and associating and mapping a damage state vector with current feature data and temperature feature data through the physical information forward model; constructing a cathode joint loss function and an anode joint loss function; respectively performing iterative solution on the cathode joint loss function and the anode joint loss function through an optimization algorithm, outputting an optimal damage state vector, and generating a damage space distribution result of the electrolysis cell. The present application can realize online inversion and spatial distribution visualization of anode and cathode damage states.
Owner:GUANGXI ACAD OF SCI +3

A method for regulating and simulating a population ecosystem

ActiveCN120673830BAvoid blind adjustmentRealize simulation
The application provides a population ecosystem regulation simulation method, wherein historical data of a population ecosystem are acquired, an initial spatial population model is constructed based on the historical data; Sobol indexes of variables in the initial spatial population model are calculated, and key regulation variables are screened from the initial spatial population model based on the Sobol indexes of the variables; observation data of the population ecosystem are acquired, and the key regulation variables are dynamically adjusted based on the observation data to obtain a target spatial population model, so that simulation of the population ecosystem is realized. The above method is used to realize accurate regulation and simulation of the population ecosystem and improve the accuracy of population ecosystem regulation simulation.
Owner:GANNAN NORMAL UNIV

Method and device for predicting number of infectious disease spreaders, electronic equipment and storage medium

ActiveCN119400445BPropagation prediction and controlGuidance on reliable vaccination strategiesInfectious DisorderPublic health
The application discloses an infectious disease transmission number prediction method and device, electronic equipment and storage medium, and relates to the technical field of public health. The infectious disease transmission number prediction method comprises the following steps: determining the current population immunity rate according to the number of newly added secondary susceptible persons in each day within a preset number of days in the past and a preset individual immunity decay function; determining the change amount corresponding to the current susceptible person number, the current infected person number and the current immune person number respectively according to the current susceptible person number, the current infected person number, the current immune person number, and the preset infection probability, the population contact rate, the infection duration, the secondary susceptible transfer duration and the population immunity rate, and combining the current susceptible person number, the current infected person number and the current immune person number to predict the future susceptible person number, the infected person number and the immune person number. The technical scheme can better reflect the change of individual immunity with time, and support more accurate immunity decay and infectious disease transmission simulation prediction.
Owner:SHENZHEN INST OF ADVANCED TECH