35 results about "Types of mesh" patented technology

The invention discloses a method for generating a tetrahedron gridding for a three-dimensional geological structure, which is used for geologic body attribute modeling and oil-deposit numerical simulation computation and analysis. The invention is characterized in that an automatic reliable recovering method for geologic restrained boundary segments and layering gridding is supplied and the tetrahedron gridding under the restraining of inputting a three-dimensional geological structured model is generated, on the basis of a standardized settling for inputting a three-dimensional geological surface gridding model and the Delaunay triangulation gridding generating method based on a point set, and by utilizing a topologic principle and detecting constraint conditions and crossing conditions of the elements such as edges, sides and bodies in an antithetical Voronoi diagram of a Delaunay tetrahedron gridding as well as establishing a corresponding point adding rule. The method is easily realized, has high reliability and has no specific demand on complexity of an initial surface model and the classification of the gridding. By using the method, the problem of gridding the tetrahedron under a complex geological structure is solved, thereby being convenient to perform further analysis and simulation computation on the three-dimensional geological model on such a basis.

The present invention relates to a screen for screen printing. More particularly, the structure of the screen can have different types of mesh or sheets joined together. The present invention also relates to a method of detachably spreading a screen to a screen frame.

An irregular mesh mapping method used in electromagnetic field-flow field-temperature field coupling calculation comprises the following steps of 1 establishing a flow field-temperature field calculation model; 2 reading node coordinate values of discrete units of the model; 3 re-establishing a geometric model of a research object in the electromagnetic field calculation, performing model discrete to form a triangular finite element mesh and performing electromagnetic field value calculation; 4 mapping power consumption onto units in a temperature field; 5 obtaining a mapping correction factor; using power consumption densities of the units as loads to be loaded into the temperature field for solution and calculation, and obtaining a temperature result; accordingly obtaining the power consumptions of the units in the temperature field. By adopting the irregular mesh mapping method used in the electromagnetic field-flow field-temperature field coupling calculation, data transfer of different types of meshes can be adopted in different physical fields, the mesh number is greatly decreased, and the calculation time and the calculation accuracy are shortened and improved.

The invention discloses a method and a device for classifying a traffic zone, which relates to the traffic information field, and is characterized in that a classified traffic zone can accurately reflect the intrinsic traffic characteristics in real time. A scheme is as follow: a zone to be classified is gridded according to a real road network; communication record quantity of each base station in each grid is acquired within a first preset time period, and a quantity discrete value corresponding to each base station is obtained; sum-and-square difference comparison is conducted for the quantity discrete value of each base station and a preset group of characteristic curves, and a minimal error characteristic curve with the minimal sum-and-square difference of the quantity discrete value of each base station is selected; the corresponding base station with the same minimal error characteristic curve is classified into the same base station type; the quantity ratio of base stations of the same base station type is calculated in each grid; the type of the grid is determined according to the base station type with the maximal quantity ratio of the base stations in the grid; and the adjacent grids with the same grid type are merged to form a traffic zone. The method and the device are used for classifying the traffic zone.

In a data printing method of printing a plurality of data items, each including a name of an object, on a print sheet by a printer which has a function for printing a plurality of types of meshing patterns, the method includes the step of printing the plurality of data items so that adjacent ones of the data items are covered with the meshing patterns different from each other.

The invention teaches a new way to make mesh bags using adhesive labels and continuous mesh tubing. Using adhesive labels on continuous mesh tubing is made possible by guiding the mesh tubing both on the outside of the tubing and the inside of the tubing so that an adhesive label does not stick to the mesh surface on the other side of the mesh tubing. As a result the invention also teaches a new type of mesh bag made with this process and a new machine used for making mesh bags.

Generation of a mesh model that can be analyzed with sufficient analysis accuracy for result evaluation and within a minimum possible calculation time even if a user does not grasp a tradeoff relation between analysis accuracy and analysis time due to mesh size is made possible. A mesh generation system designates an evaluation point (site) on an analysis target shape, analyzes plural analysis model data created with plural types of mesh size, stores a relation among mesh size, analysis result and calculation time in a mesh know-how DB, search for a mesh size which meets a required accuracy and calculation time limit, sets the mesh size that is found by the search to an analysis model. And displays the relation among mesh size, analysis result and calculation time.

The invention discloses a mesh transfer-based antenna electromechanical coupling method, and aims to provide a quick and accurate antenna electromechanical coupling method. The method is implemented by the following technical scheme: a displacement of each node of an antenna structure after deformation is obtained by utilizing ANSYS Workbench software, calculation is performed to obtain static deformation of an antenna panel, a mesh file before deformation is read by adopting an ANSYS Mechanical APDL (ANSYS Parametric Design Language), then a deformation amount of each mesh node is calculated for each mesh node, a deformation amount of each node of a finite element model is added into an original mesh to obtain a mesh of the antenna after deformation, and then the mesh is updated and a mesh file of the antenna after deformation is output by utilizing the ANSYS APDL; a CDB mesh model is read by using an ICEM CFD module, a mesh type is converted into a PAT format, a mesh file in the PAT format is imported into Hypermesh software, and a surface mesh is extracted and output; and finally a surface mesh file is imported into electromagnetic analysis software to perform simulation, and simulated electric performance of the antenna is compared with electric performance of the antenna before deformation to obtain electromechanical coupling performance of the antenna.

In one embodiment, the invention provides a method and an apparatus for generating a way in a map, and solves the problems that in the prior art, way distribution status cannot be clearly presented in an electronic map. The method includes the steps of: 1) acquiring navigation data of at least two users in a target zone in a map, the target zone including at least two grid units; 2) according to the navigation data, determining moving status of all users passing through every grid unit in the target zone, wherein the moving status includes walking status and driving status; 3) according to the moving status, determining the grid type of every grid unit, the grid type including walking grid and driving grid; and 4) according to the grid units, which are adjacent to each other and belong to the type of walking grid, in the target zone, generating a sidewalk way, and/or according to the grid units, which are adjacent to each other and belong to the type of driving grid, in the target zone, generating a lane way.

The invention teaches a new type of mesh bag suitable for machine packaging. The first end of the mesh bag is a reserved opening for filling and sealing. The second end of the mesh bag includes a one-pull, easy-open mechanism and a re-closing mechanism. The re-closing mechanism is a drawstring perforating around the second end of the mesh bag. The one-pull, easy open mechanism is a line of easy open stitches which sews a small strip of hard paper with the wall of the mesh bag at its second end. The two mechanisms can be pre-set in parallel or integrated in a same line with the small strip of the hard paper overlaid on the drawstring.

The invention belongs to the technical field of aircraft fire prevention and extinguishing, and particularly provides an aircraft cabin liquid fire extinguishing agent concentration simulation methodwhich comprises the following steps: 1) adding a physical field and a research type; 2) importing a geometric model of the cabin and simplifying; 3) carrying out simulation equivalence on a fire extinguishing spraying position; 4) setting a grid type and a grid size, and dividing grids; 5) setting a simulation model; 6) setting Haron fire extinguishing agent material parameters and initial boundary conditions; 7) initializing the system; according to the method, the fluid fire extinguishing agent spraying process is simulated through the finite volume principle, waste of manpower and materialresources in a traditional concentration test is effectively avoided, and cabin fire extinguishing agent distribution data obtained through the method have certain guiding significance in actual airplane cabin fire extinguishing system design.

According to the geometric model non-rigid matching method and device using local and global information, left and right symmetrical parts of the shape can be distinguished, and the accuracy of pointmatching is obviously improved. The method comprises the following steps: (1) inputting a pair of geometric models representing different postures of the same object, wherein the data type of the models is a grid type or a point cloud type; (2) calculating the density of each point in the model, and cutting the geometric model according to the density of the points; (3) matching the segments obtained by segmentation by using inter-segment errors and intra-segment errors to obtain a segment matching result; and (4) maintaining a model through local global exchangeability, the model including segment-related descriptor constraints and segment-related operator exchangeability constraints of the geometric object, and outputting a point matching result by using segment matching information.

The invention discloses a method for predicting the dynamic stiffness of a rubber mount, which comprises the following steps of: importing a three-dimensional model of the rubber mount into finite element pretreatment software; carrying out grid division on the rubber mount by adopting a grid to obtain a grid model of the rubber mount; importing the grid model into finite element analysis software, and setting material attributes; setting an analysis step; setting a contact step, loading preloading force, and setting constraint; assigning a grid type; and submitting operation to obtain a frequency-counterforce value, and obtaining the dynamic stiffness according to the frequency-counterforce. The error between the dynamic stiffness amplitude of the rubber mount dynamic stiffness simulation analysis curve and the actual test curve and the corresponding frequency is within 15%, and the error is small, so that the method is feasible and has certain engineering value and economic value.