19results about How to "Reduced simulation time" patented technology

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.

This invention discloses a high-performance computing-based system and method for evaluating colorectal cancer screening strategies, belonging to the field of medical information processing technology. It includes: a dual-pathway disease model module supporting both adenoma-carcinoma pathways and serrated adenoma pathways, modeled using age-dependent normal distribution progression time; an individualized risk scoring module integrating risk factors such as family history, inflammatory bowel disease, obesity, and diabetes; a screening strategy simulation module supporting combined screening strategies using different tools, employing compliance parameters specific to the Chinese urban population; a high-performance computing module using Numba JIT compilation technology for acceleration, multi-process parallel processing for further acceleration, and data structure optimization such as integer age to reduce memory usage; and a health economics evaluation module calculating indicators such as QALY, LYG, and ICER. This invention achieves significant performance improvements while maintaining model accuracy, greatly reducing simulation time for large-scale populations.

This invention relates to the field of sliding bearing simulation and optimization technology, and more specifically to a high-precision simulation and optimization design method for hydrostatic thrust sliding bearings. It establishes an efficient decoupling model of the fluid-solid-thermal three-physics field of the hydrostatic thrust sliding bearing, decomposing the overall thermodynamic field into two subfields, which are coupled with the fluid force field and the solid force field, respectively. Then, it constructs a gap oil film flow / thermal field model and a friction pair deformation solid / thermal field model, achieving equivalent coupling through data transfer. The oil film control equations are iteratively solved to obtain oil film pressure, temperature, and flow velocity; the friction pair equations, including elastic constitutive and thermal strain equations, are solved to obtain their elastic and thermal deformations, with bidirectional data transfer achieving coupled iteration. Based on the above method, simulations are performed, establishing sub-models of oil film flow and friction pair deformation, using local interpolation and dynamic meshing to process the interface; the oil cavity is optimized based on the simulation results, parametric analysis is used to establish the mapping between structural parameters and lubrication performance, the objective function and constraints are defined, and the optimal oil cavity structure is obtained through algorithms.

This invention relates to a design method for cross-flow ducts. A two-dimensional model of the axial cross-flow fan is created, meshed, and imported into a solver. Material properties, boundary conditions, and time steps are set, and the solver is run to monitor the volumetric flow rate Q at the cross-flow duct outlet. v The numerical change of Q v When periodic fluctuations are reached, the solver stops solving; then the time step is reduced, and the solver is run again; the noise model is enabled, and the solver is run again, outputting Q. v And A-weighted sound pressure level dB(A), finally selected Q v The design method identifies the range of variables to be designed when the airflow design requirements are met and the dB(A) noise design requirements are met. Within each range, the minimum value of the variable is selected as the optimal value. The cross-flow duct is then designed according to the optimal value of each variable. This design method is efficient and improves design reliability.

In the transformer inter-turn short circuit fault tracing method, storage medium and computer device provided in the application, an actual port current waveform when the transformer occurs an inter-turn short circuit fault is obtained; a plurality of estimated short circuit reasons of the transformer sent by a transformer user are received; a transformer finite element model is constructed, the transformer finite element model comprising a winding, the winding comprising a short circuit part and a non-short circuit part; for each estimated short circuit reason, the short circuit part and the non-short circuit part of the winding in the transformer finite element model are modeled in sections according to the estimated short circuit reason, the transformer finite element model after the modeling in sections is used to simulate the estimated short circuit reason, and a simulation port current waveform of each estimated short circuit reason is obtained; a cross-correlation coefficient of the actual port current waveform and the simulation port current waveform of each estimated short circuit reason is calculated, and an inter-turn short circuit fault reason of the transformer is determined according to each cross-correlation coefficient. In this way, the artificial detection cost can be reduced and the finite element model simulation time can be reduced.

The utility model discloses an automobile paint performance testing device. The automobile paint performance testing device comprises a brush, a motor, a sample tool, a PLC (Programmable Logic Controller) and a liquid spraying mechanism, the sample tool is arranged below the brush and is used for fixing an automobile paint plate sample; the brush is connected with an output shaft of the motor, the liquid spraying mechanism is used for spraying water flow containing smoke dust to the automobile panel during testing, and the PLC is a controller of the motor. According to the utility model, a sample can be repeatedly scrubbed under different environments and working conditions of a vehicle, such as mixed water added with dust and a vehicle washing medium, and the paint layer condition of the automobile panel sample after different scrubbing times can be observed, so that a reliable basis is provided for the real use performance of automobile paint, and research and development and production data can be provided for OEM.

This invention discloses a rapid beamforming method for large antenna arrays based on partitioned calibration and proximity coupling, belonging to the field of antenna design and electromagnetic simulation technology. It aims to obtain the actual realized gain pattern of large mutually coupled arrays at low cost and high speed. This invention models the array in differentiated regions: precise simulation of local coupling is performed on edge elements, while data reuse is achieved for central region elements using a pre-calibrated equivalent model. After acquiring the electric field data of each element, a global optimization algorithm based on the mutually coupled environment is used to directly solve for the element excitation distribution that optimizes beam pointing performance, and the actual realized gain pattern conforming to the actual port matching state is quickly synthesized. Simulation results show that, while maintaining accuracy similar to full-wave simulation, this invention only requires simulating a small number of key elements to efficiently synthesize the radiation pattern of a large-scale array, significantly improving design efficiency.

A control circuit for a photovoltaic inverter with reference current regulation is characterized in that: the control circuit of the inverter includes a power limiting unit, an active reference current generating unit, a reactive current injection unit, and a coordinate transformation unit; wherein, the power limiting unit provides reactive and active reference voltages to the control circuit, and generates reactive and active reference currents based on the voltages; the active reference current generating unit selects and generates a new active reference current according to the fault condition of a decrease in the output voltage of the photovoltaic power generation system; the reactive current injection unit provides compensation for the reactive reference current according to the fault condition of a decrease or increase in the output voltage of the photovoltaic power generation system; the coordinate transformation unit performs coordinate transformation on the compensated reactive reference current and the new active reference current, and outputs it to the PWM unit to realize the control of the inverter by the PWM unit and realize high and low voltage ride-through.

The invention belongs to the technical field of power system frequency response, and particularly relates to a virtual control unit frequency response credible capacity quantification method. According to the method, multiple types of power distribution side distributed resources are aggregated into a virtual control unit; constructing a distributed resource individual characteristic model, and simulating a running state; establishing a frequency response capacity evaluation model of the resource individuals in combination with the resource characteristics and the operation state; analyzing the selected resource graphical description feasible region to form a frequency response capacity analysis and evaluation method of a resource individual; establishing a virtual control unit frequency response credible capacity quantification model based on confidence and Monte Carlo simulation; and carrying out simulation analysis on the virtual control unit frequency response credible capacity quantitative model, and determining credible capacities under different confidence coefficients. According to the method, frequency modulation resources in shortage of the system can be effectively supplemented, and the frequency response credible capacity of the virtual control unit aggregating various power distribution side distributed resources can be accurately evaluated.

The application discloses an inductance winding optimization method based on finite element simulation software, relates to the technical field of converters, and first obtains the impedance of each turn winding by using the finite element simulation software, then arranges the winding by programming, matches the impedance of each parallel winding by using winding series connection, makes the parallel winding current as evenly distributed as possible, reduces winding loss, combines the simulation tool with theoretical calculation, and can quickly and accurately find the optimal arrangement mode of the inductance winding, compared with a solving method based on a theoretical loss model, can avoid a complex theoretical solving process and has higher precision, and compared with a solving method based on the finite element simulation software alone, can save a large amount of simulation time.

This invention provides a surface adaptive lifting method, relating to the field of workpiece heat treatment technology, comprising: S1, determining model parameters; S2, creating a geometric model and meshing; S3, establishing a coordinate system within the meshed geometric model set; S4, dividing the tooth surface of a large-module rack into three parts and continuously adjusting the sensor movement speed in each region to solve the dynamic temperature field distribution; and S5, using a tooth surface path adaptive speed regulation method to complete the heating process in the deceleration zone, transition zone, and acceleration zone. This invention cleverly utilizes a tooth surface path adaptive speed regulation method, enabling intelligent adjustment of the large-module rack's temperature consistency under varying sensor speeds, thus optimizing the traditional moving induction heating simulation method which suffers from difficult speed control and complex calculations.

The invention discloses a printing method and device of chip software and hardware simulation character strings, equipment and a medium, and relates to the technical field of chip embedded simulation, and the printing method of the chip software and hardware simulation character strings comprises the following steps that S10, a preset printing function is executed in response to a printing instruction, obtaining a character string needing to be printed according to the obtained character string address; wherein the preset printing function is edited based on a character string address; and step S20, printing the obtained character string. According to the method, the original printing function based on one-by-one printing of the single characters is modified into the printing function based on the character string address, and when the instruction of printing the character string is executed, the time required for printing can be shortened, so that the simulation time can be saved, and the simulation efficiency can be improved. In addition, too many resources of the chip CPU are not occupied when the serial port is written.

The invention discloses a simulation method and system for cross-regional diffusion of particulate matters under a dynamic boundary and a storage device, and relates to the field of environmental monitoring. Comprising the following steps: establishing a multi-region full-size three-dimensional geometric model containing a tunnel and a station; grid division is carried out on the model, and boundary changes caused by train movement are processed; the flow field is solved, and a dynamic velocity field under train movement is obtained; establishing an improved slip flux model to solve a particulate matter transport equation; setting boundary conditions of transient simulation; and according to the dynamic velocity field, solving concentration distribution and cross-regional diffusion conditions of particles with different particle sizes through a particle transport equation. According to the method, the simulation time is greatly shortened, the calculation memory is saved, the simulation accuracy of the particulate matters with different physical property characteristics is improved, and the migration behaviors of the particulate matters among different areas are accurately represented through dynamic boundary conditions.

Full caliber grinding and polishing controllable ring belt removal method relates to the field of full caliber polishing and grinding technology, solves the problems that the existing technology cannot accurately predict the surface removal amount distribution of the measured element, and has poor controllability, the method obtains the ring belt to be removed by detecting the actual ring belt characteristic representation of the surface of the workpiece to be polished and ground; and carries out processing simulation to obtain the simulated removal amount distribution; the simulated ring belt characteristic representation is compared with the actual ring belt characteristic representation obtained by detection, when the characteristics coincide, the speed and pressure data used in the processing simulation are used as the optimal processing parameters, and the ring belt is removed according to the optimal processing parameters. In the method, the ring belt characteristic representation is a simplified representation method of the workpiece surface, which can quantify the surface information and more intuitively reflect the surface characteristic information, and can realize the preliminary ring belt controllable removal of the full caliber polishing technology.

This invention belongs to the field of avionics technology and discloses a method for simulating and exciting a UAV bus. First, an RS422 bus data frame is set up, which is sent in a cyclic manner with the frame count automatically incrementing during the cycle. The set RS422 bus data frame is stored in the storage unit of the RS422 bus module. The DSP completes the data packet framing of the RS422 bus data frame. The upper-layer application software issues commands to control the transmission of the RS422 bus data frame, and finally, functional verification is performed. This invention supports dynamic signal simulation, allowing serial port and simulation parameters to be preset according to a file, and cyclic transmission at the hardware layer, greatly shortening simulation and testing time and improving efficiency. Cyclic data transmission according to a preset file also improves the timing of data transmission.

The invention discloses a Snesim modeling-oriented search tree mixed query acceleration optimization method and device, and the method comprises the steps: obtaining a training image and a data template, constructing a search tree based on a Snesim method, constructing a reverse auxiliary retrieval structure to establish a mapping relation between a data event attribute value and a search tree node, and obtaining a data event attribute value; the simulation progress is used as a strategy switching index, a reverse query strategy is adopted in the initial simulation stage with the progress smaller than a preset threshold value, and redundancy of search tree traversal is reduced; and switching back to the efficient traditional forward query strategy in the simulation middle and later periods of which the progress is greater than or equal to the preset threshold value. According to the method, the evolution process of condition data from sparse to dense can be dynamically adapted, the search and query time is remarkably shortened, the calculation efficiency and speed of Snesim modeling are greatly improved on the premise of ensuring the reproducibility of geologic structure features, and an effective optimization scheme is provided for large-scale geologic modeling.

This invention belongs to the field of electromagnetic design and simulation technology for electric motors, and discloses a two-dimensional simulation correction method for a radially ventilated permanent magnet wind turbine. The method includes establishing a two-dimensional radial finite element model for the target radially ventilated permanent magnet wind turbine, obtaining the magnetic field line distribution and the magnetic flux density distribution of the stator teeth, and determining the main magnetic flux path and the equivalent permeability of the stator teeth; establishing a two-dimensional axial finite element model based on the main magnetic flux path, comprising multiple core segments separated by radial ventilation ducts, and setting the permeability of the stator portion within the core segments; establishing an infinitely long axial model; and based on the two-dimensional radial finite element model, the two-dimensional axial finite element model, and... The air gap magnetic flux density was obtained from the infinitely long axial model, and the equivalent three-dimensional air gap magnetic flux density distribution and equivalent axial length were calculated. The equivalent axial length was substituted into the two-dimensional radial finite element model for unloaded and / or loaded solutions to obtain the two-dimensional simulation correction results. By introducing the two-dimensional axial finite element model to correct the two-dimensional radial finite element model, the three-dimensional air gap magnetic flux density distribution was approximated by the analytical fitting formula. While maintaining the speed of two-dimensional finite element simulation, the calculation accuracy of the radial ventilation duct field edge effect was significantly improved. The unloaded electromotive force error can be controlled within 0.5%, and the load torque error can be controlled within 1%.

The invention discloses a lumped model-based rapid modeling method for a quantum well semiconductor optical amplifier. The method comprises the following steps of: S1, extracting parameter data; s2, constructing a lumped model; s3, performing numerical simulation calculation; s4, extracting design parameters; and S5, system-level simulation optimization is carried out. Compared with an existing space-time two-dimensional device model, the lumped model-based rapid modeling method for the quantum well semiconductor optical amplifier has the advantages that original two-dimensional space-time solution is simplified into one-dimensional time solution by integrating a space propagation equation and combining reasonable approximation, so that the calculation efficiency is improved in an order of magnitude manner, and the modeling precision is improved. The time domain simulation speed of the quantum well semiconductor optical amplifier can be obviously improved, and the calculation time consumption of device and system joint debugging in the parameter extraction and optimization design process is effectively shortened.