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236results about How to "Improve Simulation Efficiency" patented technology

Simulation method of geological mineral resource reserves

The invention relates to the technical field of mineral resource reserve simulation, in particular to a geological mineral resource reserve simulation method. The method comprises the following steps: carrying out multi-source heterogeneous data acquisition on a target geological area, and carrying out comprehensive feature extraction to obtain a comprehensive data set; constructing an initial static geologic model according to the comprehensive data set to obtain the initial static geologic model; building a multi-physics field coupling model according to the initial static geologic model to obtain a multi-physics field coupling model grid; performing metallogenic fluid migration and enrichment simulation according to the multi-physics field coupling model grid to obtain a metallogenic fluid migration simulation result; carrying out geologic body geometrical morphology updating on the initial static geologic model according to a metallogenic fluid migration simulation result to obtain a dynamic geologic model; and performing reserve prediction model training according to the dynamic geologic model to obtain a reserve prediction model. According to the method, the mineral resource reserves are evaluated more accurately and dynamically through a mineral resource reserve simulation technology.
Owner:XICHANG COLLEGE

Adaptive grid generation method and device based on strain energy density error estimation

The invention relates to the technical field of engineering simulation, and provides a self-adaptive grid generation method and device based on strain energy density error estimation, in the method, error estimation is carried out by utilizing first strain energy density of a model to be analyzed, a first estimation error of the model to be analyzed can be evaluated more accurately, and then grid division is optimized. The to-be-refined region is refined layer by layer, so that the problem of sudden change of the grid can be avoided, the stability and reliability of a simulation result are improved, the region with higher precision requirement in the initial grid can be refined, the unimportant region is kept unchanged, the calculation amount is greatly reduced, and the calculation efficiency is improved while the calculation precision is ensured. The method improves the calculation efficiency, improves the simulation efficiency, reduces the consumption of calculation resources, and achieves the efficient generation and optimization of a target grid.
Owner:QUANZHOU INST OF EQUIP MFG

Porous structure generation method and streamer simulation method thereof

The invention discloses a porous structure generation method and a streamer simulation method thereof, and relates to the technical field of porous structure generation and simulation, and the porous structure generation method comprises the following steps: defining and determining phase parameters of a porous structure; selecting nodes with a preset proportion from all nodes in the set area, setting the nodes as pore seed nodes, and simulating the growth process of pores by using a result of numerical iteration solution processing based on initial values of phase parameters of the set nodes; and constructing a porous structure model. The porous structure streamer simulation method comprises the following steps: removing pores which are not communicated with the surface of a porous structure to obtain a porous solid medium model; setting parameters of gas, and performing transient solution on the discrete electron diffusion model of streamer development; and according to the transient development process of the streamer, analyzing and obtaining the influence of the pore structure on the development characteristics of the streamer. By applying the method provided by the invention, the mesh generation density in porous structure model simulation is reduced, and the efficiency of streamer simulation is improved.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Optimized molecular dynamics simulation method for monocrystalline silicon cutting process

The invention discloses an optimized molecular dynamics simulation method for a monocrystalline silicon cutting process. Comprising the following steps: initializing and setting parameters, creating a workpiece area, creating an abrasive particle area, creating an atomic box, setting atomic mass, fixing a boundary layer, selecting a potential function, carrying out energy minimization processing and relaxation processing, setting cutting parameters, and carrying out operation simulation and result visualization processing. According to the method, interaction between silicon atoms and interaction between silicon and carbon can be described more accurately by using Tersoft potential; the simulation stability is improved by setting time step length, temperature control and energy minimization; by defining different temperature control layers such as a constant temperature layer and a Newton layer, complex dynamic behaviors in the material cutting process can be better simulated; by optimizing a calculation model and an algorithm, the speed and the precision of atomic motion trail and stress distribution in the process of simulating the cutting of the monocrystalline silicon are remarkably improved, and the stability of the simulation process is ensured.
Owner:KUNMING UNIV OF SCI & TECH

Simulation method and simulation device for dynamic response of high-speed train

The invention provides a high-speed train dynamic response simulation method and device, and the method comprises the steps: building a surface element dynamic model of a to-be-tested high-speed train through a potential energy theory based on the boundary dimension parameters and panel parameters of the to-be-tested high-speed train, and building a surface element dynamic model of the to-be-tested high-speed train based on the train body structure parameters and suspension system parameters of the to-be-tested high-speed train; constructing a multi-body dynamic model of the high-speed train to be tested; aiming at the target flow test working condition, performing simulation driving on the high-speed train to be tested through a time domain serial sequence type coupling method so as to perform online coupling on the surface element dynamic model and the multi-body dynamic model, and obtaining dynamic response data of the high-speed train to be tested under the target flow test working condition; and based on the dynamic response data, obtaining a simulation result of the to-be-tested high-speed train under the target flow test working condition through function analysis. Through the method, the problem of waste of simulation calculation resources is solved, and the accuracy and efficiency of dynamic response simulation of the high-speed train are improved.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD

Grid model generation method for fluid displacement process of well cementation engineering

The invention relates to the technical field of numerical simulation, in particular to a grid model generation method for the fluid displacement process of well cementation engineering. The method comprises the following steps: acquiring geological data of a well cementation project area, and constructing an initial geological model; well cementation engineering design data are obtained, well cementation engineering topological structure modeling is carried out, and a well cementation engineering topological structure model is obtained; according to the initial geologic model and the well cementation engineering topological structure model, fluid dynamic simulation is carried out, and a fluid characteristic matrix is obtained; performing fluid displacement process simulation according to the fluid characteristic matrix to obtain fluid displacement process data; performing fluid displacement process optimization on the well cementation engineering design data based on the fluid displacement process data to obtain optimized fluid displacement process data, and performing resource allocation redistribution on the well cementation engineering design data according to the optimized fluid displacement process data to obtain optimized well cementation engineering design data. According to the invention, the accuracy of fluid displacement simulation can be improved.
Owner:YANAN GUWEI IND & TRADE CO LTD

Photoresist spin-coating process simulation method and computer equipment

The invention relates to a photoresist spin-coating process simulation method and computer equipment, and the method comprises the steps: building a fan-shaped simulation grid based on the parameter information of a target wafer and the position information of a photoresist injection port; the fan-shaped simulation grid is a fan-shaped space area in the columnar space; the columnar space is a space area defined by space extension by taking the surface of the target wafer as the bottom surface and taking the plane where the photoresist injection port is located as the top surface; establishing a two-phase flow fluid mathematical model; through the target solver, the two-phase fluid mathematical model is iteratively solved according to the boundary condition of the fan-shaped simulation grid, the fluid attribute corresponding to the two-phase fluid and the initial condition of process simulation, and the photoresist spin-coating process simulation result is determined, so that the photoresist spin-coating process simulation efficiency is improved, and the photoresist spin-coating process simulation efficiency is improved. The problems of high cost and time consumption required by a traditional simulation method are avoided, and adjustment and optimization of process parameters are more efficient and flexible.
Owner:ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT

Urban rainfall flood process simulation method combining road equivalent drainage and trunk pipe network

The invention discloses an urban rainfall flood process simulation method combining road equivalent drainage and a trunk pipe network, and the method comprises the steps: obtaining the basic data of a research region, building a two-dimensional hydrodynamic model and a one-dimensional pipe network model based on the obtained data, and carrying out the Thiessen polygon partitioning of the research region, establishing a coupling relationship among the rainwater nodes, the earth surface grids and the Thiessen polygon partitions; calculating the rainfall and infiltration process of the research area to judge whether the rainwater node overflows or not, if overflow occurs, performing overflow calculation, if not, discharging the road rainwater in the Thiessen polygon partition corresponding to the rainwater node into the rainwater node, and performing data updating according to the calculation result until the set operation time is reached, and then performing data updating according to the calculation result. And outputting a rainfall flood simulation result of the research area. According to the method, the flood process calculation of the region lacking the urban fine pipe network data is realized, and the simulation precision and the simulation calculation efficiency of the pipe network drainage process of the region lacking the urban fine pipe network data are improved.
Owner:XIAN UNIV OF TECH

Insulating pull rod lightweight design method based on multi-objective optimization algorithm

PendingCN119538634ASolve technical problems in lightweight designMeet the needs of lightweight designChaos modelsNon-linear system modelsMulti objective optimization algorithmData set
The invention discloses an insulating pull rod lightweight design method based on a multi-objective optimization algorithm, and aims to solve the problems of heavy weight and heavy workload of a bearing tool in hot-line work of an ultra-high voltage transmission line. The method comprises the following steps: setting electrical and mechanical property parameters of the insulating pull rod; then, a three-dimensional model is built through SolidWorks, and finite element analysis is carried out through COMSOL; then, an optimized data set is obtained through joint simulation of MATLAB, COMSOL and SolidWorks; secondly, establishing a mathematical optimization model, solving by adopting a particle swarm-grey wolf optimization algorithm, and improving the algorithm through Sine-Tent-Cosine chaotic mapping population initialization and a crisscross strategy; and finally performing simulation verification on the optimization scheme. The device is applied to the lightweight design of large-load insulating force-bearing tools, effectively shortens the development period of the tools, saves the production cost, improves the safety coefficient of hot-line work, and remarkably reduces the workload of hot-line workers.
Owner:CHINA THREE GORGES UNIV

Fatigue time-varying reliability calculation method and device, equipment, storage medium and product

The invention relates to the technical field of fatigue time-varying reliability analysis, in particular to a fatigue time-varying reliability calculation method and device, equipment, a storage medium and a product. The method comprises the following steps: performing crack propagation simulation on a three-dimensional plate shell structure based on a random propagation finite element method, and establishing a geometric model of a crack propagation path; based on the geometric model, calculating a stress intensity factor of the crack tip by adopting an interaction integral method, and determining change data of the stress intensity factor in the crack propagation process; based on the stress intensity factor of the crack tip and the change data of the stress intensity factor in the crack propagation process, performing numerical simulation on the crack propagation process by adopting an propagation finite element method; and based on a numerical simulation result, optimizing the crack propagation process by adopting an HLRF-BFGS optimization algorithm, and determining the reliability of fatigue crack propagation. According to the method, the fatigue reliability evaluation effect is improved.
Owner:UNIV OF SCI & TECH BEIJING

Electrode stimulation electric field simulation method and device, electronic equipment and storage medium

The embodiment of the invention discloses an electrode stimulation electric field simulation method and device, electronic equipment and a storage medium, and relates to the technical field of information, and the method comprises the steps: obtaining a brain image of a target user implanted with a stimulation electrode and an electrode implantation position of the stimulation electrode; performing brain tissue category division on the brain image to determine a first brain point cloud corresponding to the target user based on a brain tissue category division result; determining brain electrical characteristic distribution information corresponding to the target user based on a plurality of first data points in the first brain point cloud and the corresponding brain tissue electrical characteristic parameters; when the stimulation parameter is applied to the target contact of the stimulation electrode, the brain stimulation electric field distribution information corresponding to the stimulation parameter is determined based on the electrode implantation position, the brain electrical characteristic distribution information and the stimulation parameter, so that the reliability and the accuracy of the electrode stimulation electric field distribution information are improved; and the simulation efficiency and the real-time performance of the electric field distribution around the stimulating electrode are improved.
Owner:SCENERAY

Method and device for simulating thermal performance of printed circuit board heat exchanger and medium

The invention discloses a thermal performance simulation method and device for a printed circuit board heat exchanger and a medium. The method comprises the steps that a dynamic physical property calling method is established to form a dynamic link library; a three-dimensional distribution parameter model is established according to the structural size of the printed circuit board heat exchanger, and a three-dimensional array C [I] [J] [K] is used for representing all control units of the heat exchanger; establishing a flow direction description matrix of the cold side working medium and the hot side working medium in the printed circuit board heat exchanger control unit; based on the dynamic link library and the flow direction description matrix, respectively establishing control equations of cold and hot side working media of each control unit C (i, j, k); and establishing a simulation iterative algorithm of the printed circuit board heat exchanger to carry out iterative solution on the control equations of the cold and hot side working media of all the control units C (i, j, k), and when a convergence condition is met, ending thermal performance simulation and outputting a simulation result.
Owner:CHINA UNIV OF PETROLEUM (BEIJING) +1

Optical storage system fine-grained decoupling simulation solving method, system, equipment and medium

The invention relates to the technical field of electromagnetic simulation, and discloses an optical storage system fine-grained decoupling simulation solving method, system and device and a medium. According to the method, electromagnetic transient simulation modeling is carried out on a plurality of elements in an optical storage system, and an electromagnetic transient simulation model of the optical storage system is constructed; according to the method, an electromagnetic transient simulation model of the optical storage system is layered, fine-grained decoupling network division is carried out after layering, and multi-thread parallel simulation solving is carried out on the electromagnetic transient simulation decoupling model of the optical storage system based on a multi-thread CPU, so that flexible network division is realized, the calculated amount of the large-scale optical storage system is reduced, and the calculation efficiency of the large-scale optical storage system is improved. And by establishing a conflict-free parallel simulation scheme and a simulation process of the large-scale optical storage system, the simulation efficiency is improved on the premise of ensuring the simulation precision, and the method is suitable for solving the simulated large-scale optical storage system.
Owner:SHANDONG UNIV +2

Advanced adjustment method for required air volume of mine local ventilator

The invention relates to a mine local fan required air volume advanced adjustment method, which comprises the following steps of: 1, establishing a physical model of a local fan air duct by using numerical simulation software, performing simulation operation, and generating local fan air duct opening air volume simulation data under various working conditions; 2, carrying out data screening processing on the generated air volume simulation data of the air duct opening of the local fan under each working condition; 3, training a neural network according to the screened data, and performing performance prediction on the air volume of the air duct opening by using verification set data in the trained neural network; and 4, target parameters are set according to the predicted air volume value, and the output air volume is adjusted in advance through a closed-loop PID feedback control mechanism. According to the advanced adjustment method for the needed air volume of the mine local ventilator, the prediction efficiency and precision of the air volume of an air duct opening of the ventilator are greatly improved.
Owner:TIANDI CHANGZHOU AUTOMATION +1

Method for creating bridge component based on Revit and Dynamo

The invention relates to the technical field of bridge construction, in particular to a method for creating a bridge component based on Revit and Dynamo. The method comprises the following steps: S1, dividing bridge components into a point-based model and a line-based model, and respectively setting two automatic modeling programs; s2, establishing a parameterized family based on a point model, and loading the parameterized family into Revit; s3, reading the parameter data in the excel table; s4, using data to complete model size modification and automatic accurate positioning; s5, establishing a parameterized family based on a line model, and loading the parameterized family into Revit; s6, determining starting and ending point positions of the linear component; s7, determining a vertical offset distance; and S8, generating a model instance, and automatically modifying instance size parameters in batches. An excel table is read through Dynamo, parameters are automatically given to instance parameters in the model, data are used for driving parameterized model families, the model is automatically generated, and the model precision and the construction efficiency are remarkably improved. The method is mainly applied to the aspect of automatically creating the fabricated bridge member.
Owner:CHINA SHANXI SIJIAN GRP

Simulation method and device for chip design and related equipment

The embodiment of the invention provides a simulation method and device for chip design and related equipment, and the method comprises the steps: obtaining the design data of each partition in the chip design; for each partition, determining a corresponding data extraction strategy based on the type of the design data; extracting the design data of the corresponding type by using the data extraction strategy to obtain extracted data; the data extraction of each type of design data is performed in parallel; merging the extracted data corresponding to each type of design data to form chip power consumption model data of each partition; and performing simulation of chip design by using the chip power consumption model data of each partition. According to the technical scheme provided by the embodiment of the invention, the extraction efficiency of the chip power consumption model data can be optimized, and the simulation efficiency of chip design is improved.
Owner:CHENGDU HAIGUANG INTEGRATED CIRCUIT DESIGN CO LTD

Transformer winding strength detection method and system based on short circuit test

The invention discloses a transformer winding strength detection method based on a short circuit test, and the method comprises the following steps: S1, determining winding wire cake parameters according to a transformer parameter table, and obtaining the size of a transformer single cake, the size of a supporting strip, and the size of a cushion block; and S2, according to the size of the single cake obtained in the step S1, ignoring a supporting strip and a cushion block, uniformly distributing the compression height of the winding to each oil duct, constructing a two-dimensional cake-by-cake model, applying single short-circuit impact current excitation to the two-dimensional cake-by-cake model, and carrying out coupled electromagnetic-structure field calculation to obtain displacement deformation distribution of each wire cake. The boundary constraint effect of the supporting strips and the cushion blocks is considered in the three-dimensional single-line cake model, and the stress condition of the winding under short-circuit impact can be simulated more accurately. The simulation analysis considering the boundary constraint can more truly reflect the deformation and stress distribution of the winding under the short-circuit impact, and provides more reliable data support for evaluating the winding strength.
Owner:HUNAN UNIV

Grounding test system and method and nonvolatile storage medium

The invention discloses a grounding test system and method and a nonvolatile storage medium. The system comprises a grounding simulation platform, a three-phase large current generator, a remote control discharge device and a fault switching device, the grounding simulation platform comprises a simulation line, a fault simulation device, a monitoring system and the like, and the fault simulation device is used for simulating grounding faults and short circuit faults of preset types; the monitoring system is used for performing remote control opening and closing operation on the section switch and the interconnection switch so as to change the connection state of the analog circuit and monitor test data of each node in the analog circuit, and the test data comprises test current data and test voltage data; the grounding simulation platform further comprises a preset test position. The technical problems of low efficiency and existence of potential safety hazards caused by limited load current simulation capability of an experimental platform and manual discharge and fault switching are solved.
Owner:STATE GRID BEIJING ELECTRIC POWER CO +1

Efficient numerical method for simulating inter-basin flow of near space aircraft

ActiveCN119646988AImprove Simulation EfficiencyGuaranteed Simulation AccuracyGeometric CADSustainable transportationNumerical methodologyBoltzmann equation
The invention provides an efficient numerical method for simulating inter-basin flow of a near space aircraft, which sequentially comprises the following steps of: generating a physical space grid and a speed space grid according to geometric shape parameters and incoming flow parameters of the aircraft, setting a flow field variable at an initial moment, calculating interface flux, and performing implicit solution on a macroscopic adjoint equation, so as to simulate the inter-basin flow of the near space aircraft. The method comprises the following steps: obtaining a pre-estimated macroscopic quantity, carrying out implicit solution on a Boltzmann equation to obtain a distribution function of a next iteration step, and updating a flow field variable by using the distribution function to realize flow field iterative calculation. According to the method, the Boltzmann equation and the corresponding macroscopic control equation are solved in a coupling implicit mode, and the means of multi-scale macroscopic flux is constructed, so that the simulation efficiency of the cross-basin flow problem is improved while the simulation precision is kept.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Tire lateral deviation and longitudinal slip composite slip characteristic simulation method, equipment, medium and program

The invention relates to the technical field of tire dynamics, in particular to a finite element simulation method, device, medium and program for lateral deviation and longitudinal slip composite slip characteristics of a tire. The invention provides a tire lateral deviation and longitudinal slip composite slip characteristic finite element simulation method which comprises the steps of finite element pretreatment, two-dimensional inflation and three-dimensional loading modeling analysis, steady-state simulation analysis, dynamic lateral deviation and longitudinal slip composite slip characteristic simulation modeling analysis and simulation result extraction, the method is high in simulation precision, and meanwhile the simulation efficiency is considered.
Owner:ZHONGCE RUBBER GRP CO LTD +1

Power transmission system real-time simulation method and device, electronic equipment and storage medium

The invention discloses a real-time simulation method and device for a power transmission system, electronic equipment and a storage medium, which are used for solving the problem that the traditional electromagnetic transient simulation cannot completely meet the actual simulation analysis requirement of a power grid and cannot achieve a large-scale refined real-time simulation effect. According to the method, an on-chip system is adopted as a software and hardware collaborative acceleration platform of a power transmission system, and the software and hardware collaborative acceleration platform comprises a scalar engine and an adaptive engine; acquiring a main circuit and a primary sub-module circuit of the power transmission system; performing circuit segmentation on the first-stage sub-module circuit to obtain a plurality of second-stage sub-module circuits, and dividing the plurality of second-stage sub-module circuits into a plurality of first sub-module circuits and a plurality of second sub-module circuits; performing parallel simulation calculation on the simulation tasks of the second sub-module circuits through a scalar engine, and performing parallel simulation calculation on the simulation tasks of the main circuit and the first sub-module circuits through an adaptive engine; and outputting a power simulation result of the power transmission system.
Owner:ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD +1

Chip simulation acceleration method and system

PendingCN119647366AReduce the actual simulation scaleGuaranteed lead timeCAD circuit designComputer hardwareComputer engineering
The invention discloses a chip simulation acceleration method and system, and the method comprises the steps: 1, collecting all redundant design module names in a given chip, and obtaining a redundant design module name list; 2, inputting the redundancy design module name list into a preset automatic dummy module generation and replacement script, and updating a simulation file list; and 3, verifying the given chip according to the updated simulation file list. According to the method, the actual simulation scale of the chip can be effectively reduced, the simulation time can be greatly shortened, the simulation efficiency is effectively improved, and the delivery cycle of the chip is powerfully ensured.
Owner:Chinese People's Liberation Army Cyberspace Force Information Engineering University

Vehicle driving motor stator assembly modal parameter identification method

The invention discloses a method for identifying modal parameters of a stator assembly of a vehicle driving motor. The method comprises the following steps: 1) performing a modal test on the stator assembly; 2) performing modal shape identification of the stator assembly based on a modal test result; 3) establishing a finite element simulation model of the stator assembly; 4) establishing a test model of the response surface of the stator assembly; 5) simulation of a stator assembly finite element model; and 6) calculating a response surface function of the stator assembly and identifying modal parameters. According to the method, rapid identification of the modal parameters of the stator assembly is realized through a series of methods of modal test of the stator assembly, modal shape identification of the stator assembly, finite element simulation model establishment of the stator assembly, test model establishment of the response surface, simulation of the finite element model, response surface function calculation and modal parameter identification, so that the product development period is shortened; and the one-time off-line qualification rate of products is improved, and cost reduction and efficiency improvement are effectively achieved.
Owner:CHONGQING TSINGSHAN IND

Large-scale watershed water quality simulation method and system based on CNN-Transformer

The present invention discloses a large-scale basin water quality simulation method and system based on CNN-Transformer, including: obtaining meteorological and hydrological driving data, water quality data and basin attribute data of multiple basins; preprocessing the data, dividing the processed data into training set and test set according to a certain ratio; embedding the three-dimensional time series data of the training set; encoding and linear transformation of the data; training the model, obtaining the final CNN-Transformer water quality simulation model according to the evaluation index of the training result, and inputting the data in the test set into the model to obtain the simulated value of the basin water quality. The present invention combines the Tansformer model with the convolutional neural network to better handle some water quality simulation problems with non-stationary and nonlinear relationships, and better capture the interdependence between multivariate variables.
Owner:HOHAI UNIV

Battery pack thermal simulation method, device and equipment and storage medium

The invention discloses a battery pack thermal simulation method, device and equipment and a storage medium. The battery pack thermal simulation method comprises the following steps: creating a corresponding thermal simulation model according to a battery pack; acquiring an MAP parameter and a state parameter of a battery in the battery pack, and power information of the vehicle driving working condition in a preset time period; determining the working state and the instantaneous current of the battery at the current moment based on the state parameter and the power information of the battery at the current moment; determining a heat production parameter of the battery at the current moment according to the working state and the MAP parameter of the battery at the current moment; determining heat production of the battery at the current moment according to the heat production parameters of the battery at the current moment; and updating the state parameters of the battery according to the heat production of the battery at the current moment so as to output the temperature information of the battery pack. Therefore, the battery pack in the vehicle is thermally simulated.
Owner:JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD

Parallel acceleration method suitable for two-phase color gradient lattice Boltzmann method

The invention discloses a parallel acceleration method suitable for a two-phase color gradient lattice Boltzmann method, and relates to the technical field of computational fluid mechanics. By taking the total number of fluid points and boundary solid points in the porous medium as the size of a data space, distributing a storage space for the fluid points and the boundary solid points, and constructing a storage information array; the storage information array comprises storage positions of each fluid point and each boundary solid point and a mapping relation between the storage positions and points in the adjacent direction; carrying out regional division on the porous medium to obtain a plurality of flow field regions; a graphics processor is distributed to each flow field area, and according to the storage information array, parallel numerical simulation of a color gradient lattice Boltzmann method is carried out on each flow field area through each graphics processor; in the numerical simulation process, sparse matrix multiplication is adopted as matrix multiplication during collision simulation. The method can improve the efficiency of multiphase flow numerical simulation through the color gradient LBM.
Owner:XI AN JIAOTONG UNIV

VFTO sensor simulation system and method based on ATP model

The invention discloses a VFTO sensor simulation system and method based on an ATP model, and belongs to the technical field of very fast transient overvoltage measurement. The invention provides a simulation system which comprises a model creation module, a parameter setting module, a simulation operation module, an analysis module, a verification module and an optimization module, and aims at solving the problem of lightning overvoltage and VFTO monitoring in a high-voltage-class hydropower station switching station. The system creates a power system and sensor model through an ATP graph or text editor, sets simulation parameters to simulate a VFTO scene, operates simulation to collect sensor output data, analyzes waveform accuracy and sensor performance, and optimizes the sensor and the model based on a result. According to the method, simulation is rapid, monitoring is accurate, the integrity and reliability of VFTO data are effectively improved, and powerful support is provided for power grid optimization; flexible configuration of multiple scenes and multiple parameters is supported, specific requirements of different voltage grades and hydropower stations are met, and scientific basis and technical guarantee are provided for safe and stable operation of a power system.
Owner:CHINA YANGTZE POWER +1

Simulation method and device of AR optical system, medium and electronic equipment

The invention discloses a simulation method and device of an AR optical system, a medium and electronic equipment, and the method comprises the steps: obtaining an initial source file, converting the initial source file into a target file based on a Kogelnik coupling wave theory and a preset volume holographic grating structure requirement, and importing the target file into ZEMAX; acquiring a corresponding luminous source according to preset parameters of the display; obtaining an initial collimation component, converting the initial collimation component into a target collimation component, and importing the target collimation component into the ZEMAX; in a non-sequence mode of ZEMAX, calling a target file, generating a volume holographic grating, and obtaining a holographic waveguide assembly; and connecting the light emitting source, the target collimation assembly, the holographic waveguide assembly and a preset detector to obtain the target AR optical system. Compared with the prior art, simulation of the holographic waveguide assembly and simulation of the integrity of the AR optical system can be achieved, the simulation efficiency is improved, the systematicness, integrity and quality of simulation are improved, and then the optical performance of the optical system in AR equipment is improved.
Owner:JIANGXI RUIHONGDA TECHNOLOGY CO LTD

Sea surface ship target SAR (Synthetic Aperture Radar) image rapid simulation method and device and electronic equipment

The invention relates to a sea surface ship target SAR image rapid simulation method and device and electronic equipment. The method comprises the steps that a geometric model of a ship target and model parameters corresponding to the geometric model are acquired; constructing a geometric scene of the ship target according to the model parameters of the ship target geometric model; performing echo simulation in the geometric scene by using the incident excitation source, and calculating to obtain a transfer function of the naval vessel target; a linear frequency modulation signal frequency spectrum is obtained, and SAR frequency domain echoes of the naval vessel target are obtained in combination with the transfer function; performing inverse Fourier transform on the SAR frequency domain echo to obtain an SAR time domain echo; and processing the SAR time domain echo by adopting a distance-Doppler algorithm to obtain an SAR image of the naval vessel target. According to the method, by introducing the system transfer function, the situation that a large amount of time is spent for sampling is effectively avoided, the calculation efficiency is improved, and the simulation efficiency of the SAR image method is remarkably improved on the premise that the simulation precision is guaranteed.
Owner:SHIP INFORMATION RES CENT (NO 714 RES INST OF CHINA STATE SHIPBUILDING CORP) +1

Power grid, power grid system and equivalent method and model optimization method thereof

The present disclosure relates to the field of electric power, and discloses a power grid, a power grid system, and an equivalent method and a model optimization method thereof, including performing equivalent on converters in a system to obtain equivalent converters; when the number of buses in the system = the number of converters after equivalent, all converters connected to the buses are coherent converters; when the number of buses in the system > the number of converters after equivalent, let k = the number of buses in the system ‑ the number of converters after equivalent, and compare the impedance drop ratios between the equivalent converters between any buses respectively, the equivalent converters corresponding to the smallest k impedance drop ratios are coherent converters, and all converters on the buses connected to the two equivalent converters are coherent converters; so that the simulation time consumption can be effectively reduced, the accuracy of the equivalent model is improved, and a feasible technical solution is provided for realizing equivalent order reduction of phase-locked synchronous converters.
Owner:SOUTHEAST UNIV