54 results about "Quadrilateral meshes" patented technology

The utility model discloses a silicon capacitor electrode structure and a silicon capacitor, which can further improve the capacitance of a capacitor in a limited space by nesting, combining and arranging a plurality of groups of element arrays distributed in a quadrilateral grid mode more reasonably and precisely, so that the capacitor can store more charges.

The invention discloses a variable grid method grid automatic division method and device based on vector field guidance. The method comprises the following steps: extracting boundary feature points according to geometric features of an input model boundary so as to construct a feature polygon of a model, and dispersing the feature polygon into a triangular mesh model; constructing a vector field based on a Laplacian operator by using the triangular mesh model; starting from the geometric center of the model, setting an initial quadrilateral grid as an initial paving layer, paving the quadrilateral grid outwards layer by layer, and if the paving layer exceeds the boundary of the model, stopping paving; when each layer of quadrilateral grid deforms, uniform transition is achieved through a size transition template; and finally, generating a boundary quadrilateral mesh of the model by adopting a mapping method, mapping discrete points on the boundary of the feature polygon back to the boundary of the input model, and outputting a generated quadrilateral mesh model. According to the method, full-automatic generation of the quadrilateral mesh can be realized, and the method is particularly suitable for mesh generation in finite element simulation pretreatment.

A method including identifying a first vertex as a vertex to be compressed, identifying a plurality of neighboring vertices as compressed vertices, predicting a position of a second vertex, the second vertex being proximate to one of the plurality of neighboring vertices, predicting a position of a third vertex, the third vertex being proximate to the first vertex, generating a correction variable based on the position of the second vertex and a position of the one of the plurality of neighboring vertices, and determining a position of the first vertex based on the position of the third vertex and the correction variable.

The invention discloses a wing quadrilateral unit structure finite element model automatic construction method and device, equipment and a medium, and relates to the technical field of aerospace, and the method comprises the steps: determining third coordinate data of a wing middle section based on a target control parameter, first coordinate data of a wing root section and second coordinate data of a wing tip section; based on the first coordinate data, the second coordinate data and the third coordinate data, constructing an airfoil geometric parameterized model by utilizing a preset interpolation method, generating target grid control points and target grid control edges corresponding to the wing root section, the wing tip section and the wing middle section respectively, and determining a first grid control edge connecting the wing root section and the wing middle section, the second grid control edge is connected with the wing middle section and the wing tip section; and determining a wing quadrilateral unit structure finite element model file based on the first quadrilateral mesh of the skin, the second quadrilateral mesh of the wing rib and the third quadrilateral mesh of the wing spar. And a high-fidelity structural finite element model is efficiently constructed.

A computer-implemented method and apparatus for generating a quadrilateral grid from an image with an alpha channel. The method includes receiving an image with an alpha channel depicting a shape mapped onto a 3D surface, vectorizing the shape to create a vector path, determining corners by calculating a centroid and identifying the points, correcting a winding order to ensure a clockwise orientation, constructing a quadrilateral grid by setting sub-paths based on detected corners, resampling the sub-paths to match specified rows and columns, performing weighted interpolation across the grid using inverse square distance weighting, and outputting the generated quadrilateral grid for display on a computer device. The apparatus comprises a processor configured to execute these steps, including vectorizing the shape, determining corners, correcting the winding order, constructing and resampling the grid, performing weighted interpolation, and subdividing the 3D mesh for flexible manipulation and extrapolation.

The invention provides a communication system operation and maintenance management method and system applying data analysis, and relates to the technical field of data processing.The method comprises the steps that 1, original data streams of equipment operation data and service data are collected in real time, the original data streams are divided according to a preset time window, and the divided original data streams are obtained; mapping the multi-dimensional data in each window into a point cloud data set in a high-dimensional space; 2, based on the point cloud data set, spatial distribution characteristics are extracted through principal component analysis, and a virtual reference plane representing the state is constructed; and step 3, delimiting an initial quadrilateral grid on the virtual reference plane, and performing adaptive segmentation on the initial grid according to the density gradient of the point cloud data set to form heterogeneous sub-regions. According to the invention, real-time accurate early warning of communication system abnormity, rapid fault positioning and predictive maintenance based on trend analysis are realized, and the intelligent level of operation and maintenance management and the reliability of the system are effectively improved.

This invention provides a quadrilateral retopology method and electronic device based on frame field prediction. The quadrilateral retopology method based on frame field prediction includes: inputting a triangular mesh model into a frame field neural network model for direction regression and amplitude diffusion conditioned on direction to obtain the corresponding frame field; deforming the frame field to obtain a deformed mesh model; isotropically re-meshing the deformed mesh model to obtain an initial quadrilateral mesh model; and inversely deforming the initial quadrilateral mesh model to obtain a quadrilateral mesh model corresponding to the triangular mesh model. Through the steps of frame field inference, deformation, isotropic quadrilateral re-meshing, and inverse deformation, the quality of the final generated quadrilateral mesh is guaranteed, thereby achieving the goal of improving the quality of the quadrilateral mesh.

The invention discloses a method for creating a long-distance closed mesh surface model, electronic equipment and a storage medium, and the method comprises the steps: obtaining the position of a reference line in a three-dimensional space based on a route design result of linear engineering; analyzing the cross section graph, and constructing cross section component data; establishing a constraint relation of points in the cross section graph based on the reference point, and configuring a label for each constraint; generating an initial stake number list according to a preset segment interval, and dynamically inserting encryption points based on the curve type and combining the encryption points into the initial stake number list to form a final stake number list; mapping corresponding points in the cross section to a three-dimensional space according to the relative coordinates and the plane unit normal vector, and generating a cross section placement list; and on the basis of the cross section placement list and the cross section component data, constructing quadrilateral grids between adjacent cross sections, splicing the quadrilateral grids to generate transition grid surfaces, and forming a closed grid surface model by combining starting and ending transverse grids. According to the method, the precision and efficiency of long-distance linear engineering three-dimensional modeling are remarkably improved.

The application discloses a sum and difference beam optimization method of a cover array antenna, and comprises the following steps: creating an array antenna model and a cover array antenna model; performing quadrilateral mesh division on the models respectively; based on the corresponding quadrilateral mesh division of the models, performing simulation calculation by using a high-order moment method, and extracting corresponding active unit directional diagrams; applying excitation to the antenna units in the models, combining the active unit directional diagrams, calculating the sum and difference beams of the models under different scanning angles, and comparing corresponding performance indexes; and using an improved hybrid differential evolution algorithm to optimize the sum and difference beams of the cover array antenna model which does not meet the index requirements; wherein the improved hybrid differential evolution algorithm performs global and local iterative searches, and adaptively calculates a mutation factor and a crossover factor in the global and local iterative search processes. The application realizes the optimization design of the sum and difference beams of the cover array antenna, and is more in line with engineering application requirements.

A method for providing high-resolution touch sensing on 3D objects A computer-implemented method is disclosed for designing a touch sensing arrangement for a 3D object (B), the method includes (i) performing a quad meshing of the surface of the body, the quad mesh including a plurality of quadrangular areas (Q) having side dimensions matching the mutual spacing between pairs of adjacent transmit electrode lines (T) and between pairs of adjacent receive electrode lines (R) of the touch sensing arrangement, (ii) computing a quad patch layout comprising a plurality of quad patches (P), each including a plurality of adjacent quadrangular areas (Q) of the quad mesh, selectively grouping the quad patches (P) into a plurality of clusters (C) of adjacent patches (P) and packing the clusters (C) into a plurality of cluster sets, each cluster set being associated with a respective touch controller (TC), wherein the transmit electrode lines (T) and the receive electrode lines (R) of the touch sensing arrangement are designed according to a dual edge graph of the quad mesh, and interconnecting conducting paths are established between transmit and receive electrode lines (T, R) of each cluster set and the respective touch controller (TC) through the internal volume of the object (B).

The invention discloses a method for generating a quadrilateral curved surface grid, the quadrilateral curved surface grid can cover the curved surface of a three-dimensional object so as to analyze the three-dimensional object, and the method comprises the following steps: obtaining a curved surface digital geometric model of the three-dimensional object; constraint on grid singular point configuration on the curved surface is received, the singular point configuration comprises at least one designated position and a target price number of the designated position, and the price number represents the number of edges connected with grid vertexes; on the basis of the Riemannian-Rooch theory, a finite-dimensional quadrilateral grid generation space is constructed within the range meeting singular point configuration constraints, and construction comprises calculation of a primary function of a sub-pure function linear space L (D) corresponding to singular point configuration; selecting a specific grid generation parameter combination from the quadrilateral grid generation space; a quadrilateral curved surface grid is generated and output according to the grid generation parameter combination, and singular point distribution of the grid conforms to the received constraint; and the quadrilateral curved surface grid is provided for a finite element analysis or isogeometric analysis solver and is used for carrying out simulation analysis of mechanics, thermotics or fluid dynamics on a three-dimensional object.

The pure quadrilateral partition intelligent generation method based on the diffusion model comprises the following steps: S1, a global integer linear programming model containing a plurality of objective functions is constructed, and a quadrilateral grid which is symmetrical and aligned is generated by minimizing the objective function; S2, a two-dimensional contour graph of a CAD model is obtained according to an open source three-dimensional CAD model data set ABC; a triangular mesh model is generated according to the two-dimensional contour graph; S3, boundary fairing treatment is performed on the triangular mesh model, and hole digging and random segmentation are further performed in the interior; S4, a signed distance field is generated according to the triangular mesh model; a pure quadrilateral partition is extracted according to the quadrilateral grid; and a model outer contour image is obtained according to the pure quadrilateral partition; S5, a pure quadrilateral partition generation diffusion model is constructed; and the pure quadrilateral partition generation diffusion model is trained by using the signed distance field and the model outer contour image. The pure quadrilateral partition is rapidly generated, and the training time of the diffusion network model is greatly shortened.

The subject of the application is a price label sheet used for printing commercial content and dividing and shaping without the need for tools, intended for placement on retail shelves. The price label sheet, in the form of a card divided into regular fields with intersecting score lines, is characterized in that the card (1) is divided into quadrilateral fields (4) by score lines (2) interconnected by dot bridges (3) with a width of 0.1 mm to 0.5 mm, with the dot bridges (3) spaced on the edges of the fields (4) at distances of 1 to 20 mm.

The embodiment of the application provides a grid division method for additive manufacturing slice type multilayer structure, which can solve the technical problem of poor grid division capability in the related art. The method comprises the following steps: dividing a surface grid on a first surface, and converting a second surface into a point cloud result. According to process constraints, matching grid nodes and surface nodes to obtain surface node pairs. In this way, not only the geometric shape is considered, but also the additive manufacturing layering process. According to the surface node pairs, based on a quadrilateral grid, layered hexahedron-based finite element units are divided, that is, a volume grid is generated through the surface grid. While achieving rapid grid division, the stability of various spatial surfaces is ensured, and a grid division algorithm with high automation degree, good stability and good grid quality is realized. The grid division is performed on the additive manufacturing slice type multilayer structure, the material direction and the layering direction are accurately specified, and the efficiency and accuracy of simulation calculation of the additive manufacturing slice type multilayer structure are improved.

The application relates to the field of mesh generation, and discloses a mesh generation method and system, the method comprising the following steps: acquiring an initial mesh information file; the initial mesh information comprising quadrilateral mesh and position information between the quadrilateral mesh and upper, lower, left and right nodes; constructing a mesh generation model, the mesh generation model comprising a first long short-term memory network and a deep neural network connected in sequence; inputting the initial mesh information file into the trained mesh generation model, performing semantic information embedding on the initial mesh information file by using the first long short-term memory network, and generating a mesh parameter matrix; and transmitting the mesh parameter matrix to the deep neural network to learn mesh parameter information, and generating a mesh division information file. The application improves the precision and efficiency of mesh generation.

The embodiment of the invention discloses a map boundary region construction method and device, electronic equipment and a storage medium, and the method comprises the steps: generating a regular quadrilateral grid according to an original grid resolution, enabling vertexes to accurately correspond to pixel boundary intersection points, and enabling each patch unit to map a single pixel region; calculating a geometric center coordinate of the patch and sampling raster data to obtain a pixel region identification code; traversing adjacent edges of the grid, and screening edges with different identification codes on two sides to form a discrete boundary line segment set; based on the vertex connection relation, recombining the discrete line segments into a geometrically connected boundary broken line set through depth-first traversal; a parameterized path geometry grid is generated based on a broken line, and real-time width adjustment and subdivision precision are supported. According to the method and the device, the common problems of sawteeth and mosaics in traditional grid boundary visualization are solved, and the visual performance effect of a game scene is remarkably improved.

The invention relates to the field of tools, in particular to a CAE (Computer Aided Engineering) design method for a glass molded surface formed outside a furnace, which is realized by adopting three types of software of Matlab, Python and Abaqus cooperatively, and comprises the following steps: S1, establishing an initial glass forming simulation model: performing quadrilateral mesh division (the mesh size is 5mm) on glass and a cold ring in Hypermesh, and outputting an inp format file; the inp file is imported into Abaqus, glass material attributes (including elasticity modulus, Poisson's ratio and viscoelastic parameters) are set, and the CAE design method for the glass profile formed outside the furnace checks deviation changes in real time, discovers calculation anomalies in time and avoids invalid iteration; an existing plate glass iteration method is compatible, and extra development is not needed.

The application discloses a structure surface grid automatic generation method based on topological filling, and relates to the technical field of aerospace engineering simulation and grid generation. The method comprises the following steps: intelligently dividing a three-dimensional CAD model into parts to obtain parts with semantic labels and geometric contours; sequentially performing ordered topological filling on each part according to a preset order, adjusting the number of intersection edge points of adjacent parts to ensure grid connection, and generating topological lines; projecting the topological lines onto the model surface for calibration; adaptively interpolating the projected topological lines based on model curvature and simulation conditions to generate point cloud data; generating an initial quadrilateral grid based on the point cloud; projecting the initial grid nodes onto the model surface again and optimizing the quality, and outputting the final grid. The application realizes end-to-end automatic generation from a CAD model to a high-quality surface grid, eliminates manual intervention, ensures the natural matching of grids between parts, and significantly improves the grid generation efficiency and quality.

The invention discloses a quadrilateral mesh lightweight method and system, a storage medium and equipment, and the method comprises the steps: receiving an input mesh, and converting the input mesh into an initial quadrilateral mesh if the input mesh is a triangular mesh; performing iterative optimization on the initial quadrilateral grid by taking a variance of minimizing a side length and a diagonal length of the quadrilateral grid as an isometric optimization target; in the iterative optimization process, cooperatively executing local operation set and tangent space smoothing so as to gradually reduce the number of patches of the initial quadrilateral mesh and maintain a geometric structure; combining feature line retention and adaptive density control based on a user predefined density function to retain geometric features and adjust grid densities of different areas; and when a preset termination condition is met in the iterative optimization process, outputting the lightweight target quadrilateral mesh. According to the method, the structure regularity and geometric fidelity of the simplified grid are improved, and the problem of grid degradation caused by a traditional global folding method is effectively solved.

This application relates to the technical field of 3D modeling methods and systems based on spatial hand-drawing and AI intelligent completion. Specifically, it discloses a 3D modeling method and system based on spatial hand-drawing and AI intelligent completion, aiming to solve the problems of complex operation, high learning threshold, and limited creative expression in traditional 3D modeling. The method includes: freely drawing spatial curves on a 3D canvas and then using AI to optimize smoothness; selecting a closed wireframe and triggering AI to intelligently repair gaps and generate quadrilateral mesh surfaces, providing multiple topology options for the user; based on geometric features and design context, AI automatically matches and generates suitable materials; finally, a lightweight neural rendering engine is called to quickly generate a preview image. By adopting the above technical solution, this application can achieve high-quality 3D modeling with minimal interaction, significantly reducing the usage threshold, improving the freedom of creative expression and modeling efficiency, while ensuring the topological regularity and rendering realism of the output model.

The application provides a communication system operation and maintenance management method and system applying data analysis, relates to the technical field of data processing, and the method comprises the following steps: step 1, collecting the original data flow of equipment operation data and service data in real time, dividing the original data flow according to a preset time window, and mapping the multidimensional data in each window into point cloud data set in a high-dimensional space; step 2, based on the point cloud data set, extracting spatial distribution characteristics through principal component analysis, and constructing a virtual reference plane representing a state; step 3, drawing an initial quadrilateral grid on the virtual reference plane, and adaptively segmenting the initial grid according to the density gradient of the point cloud data set to form a heterogeneous sub-region. The application realizes real-time and accurate early warning of communication system abnormalities, rapid fault positioning and predictive maintenance based on trend analysis, and effectively improves the intelligent level of operation and maintenance management and the system reliability.

This invention discloses a method, electronic device, and storage medium for creating a long-distance closed mesh surface model. The method includes: obtaining the position of the baseline in three-dimensional space based on the route design results of linear engineering; analyzing cross-sectional graphics and constructing cross-sectional component data; establishing constraint relationships between points in the cross-sectional graphics based on baseline points and configuring labels for each constraint; generating an initial station list according to preset segment spacing, and dynamically inserting and merging densified points into the initial station list based on curve type to form a final station list; mapping corresponding points in the cross-section to three-dimensional space according to relative coordinates and planar unit normal vectors to generate a cross-section placement list; constructing quadrilateral meshes between adjacent cross-sections and splicing them to generate a transition mesh surface, combining the transverse meshes at the start and end points to form a closed mesh surface model. This invention significantly improves the accuracy and efficiency of three-dimensional modeling for long-distance linear engineering projects.

The invention discloses a method for automatically generating a finite element model of a wing hexahedron element structure, and belongs to the field of multi-physics field coupling numerical simulation. Comprising the steps that a radial basis interpolation model driven by a curve distance is adopted, topologically consistent wing root and wingtip quadrilateral grids are generated, geometric and topological mapping from two dimensions to three dimensions is achieved through control point alignment and spanwise over-limit interpolation, a wing is divided into 10 parameterized blocks, internal nodes are generated through tensor product interpolation, and the internal nodes are divided into 10 parameterized blocks. And combining repetitive nodes based on a spatial hash algorithm, and constructing a globally consistent hexahedral unit topology. According to the method, full hexahedron unit generation can be ensured, and the generation efficiency is remarkably improved compared with that of a manual interactive method.

The invention discloses an orchestrable highway tunnel lining surrounding rock multi-medium seepage analysis system and method.The method comprises the steps that firstly, contour lines are automatically generated based on section parameters, a section contour is obtained through sweeping and truncation, and quadrilateral grids are generated; quadrilateral grids of the tunnel lining surrounding rock section are automatically grouped, permeability coefficients and boundary water heads are mapped, and after a water head field is solved, seepage pressure scalar quantity and specific flow vector distribution are output; a sample library is constructed, machine learning regression is adopted to predict the Tunnel 3D key unit seepage pressure, the confidence coefficient is output, and in combination with boundary clamping, interface gradient constraint, adjacency graph smoothing and residual error driven section encryption recharge updating, three-dimensional coloring visualization and standardized output of a seepage analysis result are achieved. According to the method, the modeling automation and traceability are improved, the cross-mileage result consistency and visualization readability are improved, the three-dimensional global numerical solution cost is remarkably reduced, and the reliability and engineering applicability of seepage analysis are improved through physical constraints and self-adaptive closed loops.

The application relates to the technical field of free surface machining, and particularly discloses a laser additive manufacturing method for a free surface circuit, which specifically comprises the following steps: extracting a curved surface metal conductor model; dividing the curved surface metal conductor model into a plurality of quadrilateral grids, calculating the curvatures of each vertex in each quadrilateral grid, obtaining the average value of the curvatures of the positions of the vertices, and dividing a galvanometer processing area; according to the minimum normal angle principle, solving the optimal processing posture of each galvanometer processing area, and calculating the parameters of five mechanical movement axes; in each galvanometer processing area, the laser incidence angle under the optimal processing posture is determined; and the laser parameters are matched according to the laser incidence angle. By controlling the position between the laser and the free surface circuit, the laser can be incident on each processing area with the smallest incidence angle, and meanwhile, the laser micro additive manufacturing processing of the free surface surface circuit can be realized in a high-efficiency, high-precision and high-reliability mode by dynamically associating and controlling the laser parameters and the incidence angle.

The invention provides a VOF-based numerical simulation method for a welding spot cavity of a vacuum vapor welding, which comprises the following steps: creating a BGA welding spot two-dimensional model and presetting a plurality of bubbles, simulating the flowing of a welding flux by adopting a laminar flow model, and simulating the interface of the welding flux and the bubbles by adopting a multiphase flow VOF model. A multi-area method quadrilateral mesh is adopted, and a UDF user-defined program is matched to simulate a flow field when bubbles escape from the solder; and meanwhile, by improving boundary condition setting, the calculation time is shortened, the calculation efficiency is improved, and the process that bubbles escape from the BGA welding spots in the welding process is rapidly and truly simulated.

A woven quadrilateral mesh origami structure includes first linear sections of a foldable material positioned in a first orientation, the first linear sections including first creases formed into the first linear sections that define first quadrilateral segments of the first linear sections; and second linear sections of the foldable material that are positioned in a second orientation that is not the first orientation and placed adjacent to first surfaces of alternating sections of the first linear sections and second surfaces, opposite the first surfaces, of other sections, other than the alternating sections, of the first linear sections. The second linear sections include second creases formed into the second linear sections that define second quadrilateral segments of the second linear sections, and the first quadrilateral segments of the first linear sections and the second quadrilateral segments of the second linear sections form a tessellated mesh structure.

The invention discloses a singular point topology alignment-based model processing method and device and a storage medium, and relates to the technical field of model processing, and the singular point topology alignment-based model processing method comprises the steps of constructing a first regular family structure corresponding to a half structure of a model grid, the first normal family structure comprises at least one first normal family, and the first normal family comprises at least one dual string; based on the first normal family of which the width is greater than a preset width threshold value, searching to obtain a spiral dual string in the model grid; searching and eliminating a spiral path of the spiral dual chord so as to eliminate spirals in the model grid; constructing a second regular family structure of the model grid after the helix is eliminated; and processing the second regular family structure based on string drawing and / or string filling so as to align non-spiral dual strings of the model grid and obtain the model grid after topology alignment. According to the method, singular point fragments of the full-quadrilateral grid are reduced, and the fragment size is increased, so that the structured degree and the grid quality of the grid are improved.

The invention relates to a two-dimensional hydrodynamic model grid partition optimization method based on a hybrid neural network, and the method comprises the steps: generating a two-dimensional quadrilateral grid based on a physical boundary, and storing the topological structure data of the grid; dividing a grid needing to be optimized into a plurality of sub-grids, and storing common edge data of a sub-grid set and a remaining grid set; performing grid orthogonality optimization on the grids in the remaining grid set; sequentially carrying out orthogonality optimization on the sub-networks in the sub-grid set by using a physical information neural network; a bidirectional data updating mechanism of adjacent sub-grids is constructed, and collaborative linkage of sub-grid optimization is realized; and combining the optimized sub-grid set and the residual grid set according to a rule to obtain an optimized quadrilateral grid. The hydrodynamic model is split into sub-grids and residual grids through a partition optimization strategy, so that the calculation amount is remarkably reduced, and the optimization efficiency is improved; the hybrid optimization mode of combining the physical information neural network and the traditional grid correction algorithm avoids local optimum and improves the optimization quality.

A computer-implemented method and apparatus for generating and refining synthetic images of customizable products. The method includes receiving a text prompt describing a product and a desired markup, generating a synthetic image using a generative AI system, validating the image against physical product specifications, mapping the image onto a 3D surface using quadrilateral grid interpolation, applying inpainting techniques to remove the markup while preserving fabric details, incorporating lighting and specular effects to enhance realism, and integrating the enhanced image into an interactive asset for user interaction and customization prior to manufacturing. The apparatus comprises a generative AI system, a validation and correction module, a 3D mapping and image synthesis module, an inpainting module, an interactive asset creation system, depth estimation and mapping tools, and a lighting and specular effects module. The system supports real-time customization and multiple design variations, ensuring conformity with physical specifications.