14results about How to "Reduce computational difficulty" patented technology

The application discloses a layout design method and device for a ventilation pressure regulating facility of an underground water storage cavern, and the method comprises the following steps: determining layout parameters of a tunnel group of the water storage cavern; constructing a water power simulation model of the water storage cavern composed of the tunnel group based on a one-dimensional water flow motion control equation; solving a distribution of a water hydraulic characteristic value along a path under a non-constant flow condition according to the water power simulation model, determining a space-time distribution of a tunnel section in a pressurized state and a non-pressurized state, judging a required ventilation amount according to the space-time distribution, and initially drafting a layout scheme of a cavern ventilation pressure regulation; adjusting the layout parameters, checking and analyzing whether the layout scheme of the ventilation pressure regulating facility is reasonable under the non-constant flow operation condition, and correcting the layout parameters of the water power simulation model established based on the one-dimensional water flow motion control equation according to a calculation result; and repeating the steps of adjusting, checking and correcting until a reasonable layout scheme of the ventilation pressure regulating facility is constructed.

This invention relates to the field of lighting control technology, specifically a lighting control method and system. The lighting control method includes the following steps: obtaining the influence range of the lighting; identifying several designated targets within a certain range; marking each designated target; obtaining the current distance between each designated target and the lighting source; obtaining the current output power of the lighting source; and outputting a protection signal when a marker enters the influence range, and the current distance is less than a preset distance threshold, and the output power is greater than a preset power threshold. This invention solves the complex problem of the degree of lighting effect in a simple way, replacing complex energy density calculations, and intuitively and quickly achieves safety judgment, providing a new perspective on solving the impact of lighting sources on designated targets.

The application provides a parameter design method of a acetabular revision guiding support based on image modeling, and belongs to the field of medical instruments, and comprises the following steps: establishing an acetabular coordinate system, and extracting geometric parameters of medical images of a bone defect area; defining a plurality of bone trabecula metal acetabular cup outer cup abduction angle, anteversion angle and vertical upward height, and coupling to obtain a limited parameter combination; respectively calculating the contact volume ratio η of the bone trabecula metal acetabular cup and the bone defect area and the distance Doffse from the rotation center of the outer cup to the healthy rotation center; screening a group of optimal parameters according to the numerical values of η and Doffse; and designing a guiding support for the outer cup according to the optimal parameters. The application provides a simple, efficient and accurate digital solution for Paprosky III type acetabular defect revision, and the core geometric quantification method and guiding support design can be expanded to other complex bone defect repair, and has significant clinical application value and technical foresight.

The application discloses a high-parallelism storage-computation integrated polar code decoding method based on coset decoding, and belongs to the technical field of channel coding and decoding. The method comprises the following steps: constructing an error pattern group and a check constraint subgroup; performing coset division on the error pattern group to obtain a set of mutually disjoint cosets; screening a limited number of minimum cosets based on the minimum Hamming weight of the cosets; and performing parallel decoding processing on the paths corresponding to the minimum cosets in the storage-computation integrated architecture. k The number of paths in the traditional multi-bit decoding is reduced from 2 to a preset number L through coset division, and the parallel execution of the likelihood information updating and the path metric calculation is realized in combination with the calculation-type storage array, so that the decoding performance is ensured, the calculation complexity and the hardware resource consumption are significantly reduced, and the decoding throughput and the energy efficiency are improved.

This invention discloses a method, system, and apparatus for detecting the flow rate of a belt conveyor, relating to the field of belt conveyor flow rate detection. The method includes: obtaining the radius of the material cross-section; constructing an equation for the circle containing the material cross-section based on the radius of the material cross-section; calculating the first and second contact points of the circles containing the material cross-section and the belt cross-section based on the equations of the two circles; calculating the area of ​​the material cross-section based on the center and radius of the circles containing the material cross-section and the belt cross-section, the first contact point, and the second contact point; and calculating the real-time material flow rate of the belt conveyor based on the area of ​​the material cross-section and the conveying speed of the belt conveyor. This invention achieves the goal of real-time monitoring of the belt conveyor system, minimizes the time required for real-time measurement of the material flow rate, and improves the operating efficiency of the belt conveyor system.

This invention discloses a method, apparatus, and storage medium for segmenting deformable electron beam mask patterns. The method includes: first, determining the concave vertices in a composite polygon; then, generating candidate segmentation lines based on the concave vertices; next, constructing correlation data between the candidate segmentation lines; then, calculating the total cost of each candidate segmentation line; optimizing the candidate segmentation lines based on their total costs; selecting candidate segmentation lines based on their total costs; and finally, segmenting the composite polygon based on the selected candidate segmentation lines. This invention achieves high-efficiency and high-precision mask pattern segmentation by generating candidate segmentation lines from the concave vertices of the composite polygon, constructing relationships between the candidate segmentation lines, and calculating the total cost of each candidate segmentation line. This allows for the formulation of a selection strategy based on the total cost of each candidate segmentation line and the relationships between them, resulting in the optimal segmentation method.

This invention discloses a method and system for calculating the load margin of a three-phase unbalanced distribution network. First, the network topology is traversed to obtain line parameters and load access methods, establishing an initial semidefinite programming model of the three-phase unbalanced branch power flow and converting it to a sequence component framework. Next, a positive-sequence power flow Jacobian matrix is ​​constructed, and the minimum singular value lower bound constraint and delta-connected load power constraint are introduced using the matrix maximum convex subset construction method. Then, an iteratively optimized semidefinite relaxation-tightening constraint is established using a semidefinite programming method, forming the final load margin calculation model. Finally, the relaxation matrix result is obtained through iterative solving, and the load margin power flow result is output. This invention can accurately assess the load margin of a three-phase unbalanced distribution network, exhibiting good convergence and accuracy.

The invention provides a method, device and equipment for determining the generating capacity of a vertical-axis wind power plant, and relates to the technical field of wind power plants. The method comprises the following steps: acquiring basic parameters of a vertical-axis wind power plant and wind resource distribution parameters of each vertical-axis wind generating set; according to the power curve and the wind resource distribution parameters, the theoretical generating capacity of each vertical axis wind generating set is determined; according to the basic parameters and a preset general wake flow value standard library, a first wake flow value corresponding to each vertical axis wind generating set is determined through the average wind speed of the vertical axis wind generating set in the preset sector and the distance between the vertical axis wind generating set and the adjacent vertical axis wind generating set; according to the wind direction frequency and the first wake flow value, determining a target wake flow value of each vertical axis wind generating set; and determining the target generating capacity of the vertical-axis wind power plant according to each target wake flow value and the theoretical generating capacity. According to the scheme, rapid and accurate evaluation of the generating capacity of the vertical-axis wind power plant is realized, and meanwhile, the calculation difficulty is reduced.

The application discloses a kind of pipe flow convection heat transfer coefficient calculation method based on discrete data, comprising the following steps: obtaining a special solution of fully developed flow energy equation;With the special solution as reference solution, velocity and temperature data are assigned to regional discrete points;According to the average temperature of pipe section, the convection heat transfer coefficient of pipe flow is backstepped, and the smooth curve is obtained by using mean filtering method;Approximate solution of convection heat transfer coefficient is obtained;Compare the accuracy of the proposed calculation method and traditional method;Change the number of data points, compare the number of data points required by the proposed method and traditional method, and take the method with fewer data points as the better method;The convection heat transfer coefficient of fully developed flow of ordinary circular pipe and annular pipe under different pipe wall temperature conditions is calculated.The application can directly calculate the convection heat transfer in pipe and achieve the effect of reducing the required data points and saving the calculation cost.

The application relates to the technical field of rail transit lightning protection and electrical safety analysis, and discloses a method for establishing an equivalent calculation model of a steel rail transmission line, a terminal and a medium. The method is applied to lightning transient analysis of a non-standard I-shaped structure steel rail. First, two layers of cylindrical current layers are arranged outside a steel rail conductor; then, impedance parameters of a system composed of the inner cylindrical current layer and the steel rail, impedance parameters of a system composed of the outer cylindrical current layer and the ground and mutual impedance parameters of the steel rail are calculated; the influence of skin effect and magnetic saturation effect on the impedance parameters of the steel rail is analyzed by using finite element software, and a final steel rail frequency domain impedance parameter matrix used for modeling is obtained according to the analysis result; and finally, a time domain transmission line equation containing frequency variable parameters is established based on the steel rail frequency domain impedance parameter matrix. The application can obtain the frequency domain characteristic parameters of the conductor impedance of a steel rail section, analyze the influence law of magnetic saturation nonlinearity on the internal impedance parameters of the steel rail, and establish a lightning transient response calculation model of the steel rail.

A computational method for investigating the gas compression and temperature rise phenomenon in the main steam pipe of a nuclear reactor is proposed. This method is applicable to simulating the abnormal temperature and pressure rise in the secondary steam pipe of the steam generator caused by the loss of secondary feedwater and the closure of the main steam isolation valve in a full-pressure small reactor. The method mainly includes the following parts: 1. Simplifying the geometry of the secondary steam main pipe and constructing a 3D model; 2. Using SpaceClaim software to perform 3D modeling of the simplified steam main pipe structure; 3. Using the mesh function of Fluent software to generate a computational mesh for the model; 4. Establishing suitable compressible flow and turbulence models; 5. Defining boundary conditions and initial conditions; 6. Setting the solver and solution method, and setting the time and spatial discretization formats; 7. Adjusting the sub-relaxation factor and setting the time step that conforms to the computational time scale; 8. Setting the convergence criterion and monitoring physical quantities such as cross-sectional temperature and inlet pressure until the pressurization process in the 3D model ends and the container reaches a steady state.

The application discloses a printed image retrieval method and system, and belongs to the technical field of image processing. In order to solve the technical problems of difficult to balance macro layout and micro details, color and structure coupling and blurred boundary of dense patterns in printed image retrieval, gradient energy field is extracted from a query image, and significant area screening is performed, so that global image blocks and a plurality of local image blocks are obtained. A feature extraction model is used to obtain global features and a plurality of local features respectively, and fusion features are generated through pooling, weighted splicing and normalization. Finally, similarity matching is performed with a feature library to obtain a retrieval result. The application realizes effective decoupling of color and structure, significantly improves the retrieval accuracy of images with no boundary dense patterns, cross-scale and non-rigid deformation without additional detection models, and reduces the algorithmic cost of industrial deployment.

The application discloses a kind of source network load storage project planning annual each hour operation evaluation method and device, according to the characteristics of wind power, photovoltaic, energy storage, power grid, load joint operation, consider the charge and discharge plan of energy storage device in each time period in the operation process of source network load storage project.The sum of annual power purchase cost, energy storage device loss cost, equipment operation and maintenance cost is minimum as target, consider power balance constraint, wind power, photovoltaic, power grid, energy storage each equipment operation constraint, energy storage state-of-charge constraint, etc., a kind of source network load storage 8760 hours operation simulation method based on particle swarm optimization is proposed.Finally, the economic indicators of source network load storage in any time period and the whole year, new energy curtailment rate, new energy power proportion and other technical indicators can be output, which provides favorable support for decision-making.

This application provides a speech denoising method, apparatus, device, storage medium, and product. The technical solution provided in this application obtains subspace feature information of the speech information to be processed in multiple signal subspaces through a speech denoising model, combines the multiple subspace feature information into denoising feature information, and generates denoised speech information based on the denoising feature information. By decomposing the feature information of the speech information to be processed into multiple subspace feature information from different signal subspaces, the speech denoising model can perform denoising processing on the speech information to be processed from different signal subspaces, reducing the computational load and difficulty of denoising the speech information to be processed, and effectively improving the efficiency of speech denoising.