76 results about "Hybrid mesh" patented technology

A method for selecting a route by a node between a source node and a destination node in a wireless mesh network by establishing the route between the source node and the destination node using media access control addresses is described. A method for a node to selecting a route to join a multicast group in a wireless mesh network using media access control addresses, is also described.

A method of generating a hybrid grid allowing modelling of a heterogeneous formation crossed by one or more pipes such as, for example, an underground formation where one or more wells have been drilled, in order to form a representative model, for example of fluid flows in the formation in accordance with a defined numerical pattern is disclosed. The method comprises associating a first structured grid for gridding of the heterogeneous medium regarding discontinuities thereof with a second structured, radial type grid for gridding of a zone around each pipe or well, which allows better constraints linked with flows in the zone, and transition of non-structured grids that are interposed between the first grid and each second well grid. Various grids are combined, each with its own formation, representation and exploration methods, structured grids which are advantageous in facilitating control and comprehension of the reservoir images formed and more flexible non-structured grids for gridding of complex zones. An application is simulation of hydrocarbon reservoirs.

A method of generating a hybrid grid of a heterogeneous formation crossed by one or more geometric discontinuities such as, for example, an underground formation where one or more wells have been drilled, or a fractured formation, by combining structured grids and non-structured grids in order to carry out simulations in accordance with a defined numerical pattern is disclosed. Hybrid gridding is performed by associating a first structured grid (G1) for gridding of the heterogeneous medium considering discontinuities thereof with second structured, radial type grids (G2) for gridding of a zone around each pipe or well, which allows better consideration of constraints linked with flows in the zone. In order to connect the first grid of the medium and the second well grids, non-structured transition grids (G3) are interposed there between. A power diagram technique is used, which is particularly advantageous in that it allows appropriate connection of non-regular structured grids. An application is hydrocarbon reservoir simulation.

A method for evaluating fluid flows within a heterogeneous formation, crossed by one or more geometric discontinuities, comprising generating a hybrid grid from a CPG type grid and from structured grids having application, for example, in simulation of hydrocarbon reservoirs. The first stage locally deforms a CPG type grid into a non-uniform Cartesian grid. These local grid cell deformations correspond to the change from a so-called “CPG” frame of reference to a so-called “Cartesian” frame of reference defined by the deformation. These deformations are then quantified and applied to the structured grids so as to shift to the “Cartesian” frame. A hybrid g rid is then generated in the “Cartesian” frame from the two thus deformed grids. Finally, the hybrid grid is deformed to return to the “CPG” frame, prior to improving the grid quality, by optimization under quality control in the numerical scheme sense.

In a wireless or hybrid mesh communication system, radio frequencies are managed by assigning an in-use frequency channel to each local family of nodes, distributing spare frequency channel(s) among the local families of nodes, and changing the in-use frequency channel of at least one selected local family of nodes to a new frequency channel selected among its spare frequency channel(s), if any, or among the spare frequency channel(s) of another local family of nodes if said at least one selected local family of nodes has no spare frequency channel(s), and / or as the in-use frequency channel of another local family of nodes if none of said local families of nodes has spare frequency channel(s).

A hybrid mesh belt has a mesh portion (23) with side edges attached to modular plastic chains (38, 41). The chains (38, 41) are preferably provided with cavities (50) on the bottom side. The cavities (50) are suitable for engaging with driving sprockets (53) that engage with the chains (38, 41).

A method of forming a hybrid mesh representation of an object surface is provided, along with the hybrid mesh representation and data structures corresponding to various polygons in the hybrid mesh representation. The hybrid mesh representation comprises a base mesh and one or more higher level meshes. At least one of the higher level meshes representing a patch is an irregular mesh. The method of forming the hybrid mesh representation comprises the steps of forming a base mesh, and then forming one or more higher level meshes from the base mesh through one or more regular refinement operations in combination with at least one irregular operation.

A network device operable with a hybrid mesh network having a plurality of network and client devices, comprising: a processor, a memory, and a first independently addressable network interface and a second independently addressable network interface, the first network interface and the second network interface being adapted to enable multiple communication pathways within the hybrid mesh networkwherein the network device is configured to determine communication characteristics of one or more of the multiple communication pathways thereby to enable determination of optimization of communication within the hybrid mesh network by partitioning of the hybrid mesh network into two or more mesh islands wherein communication within each mesh island is non-overlapping with the another of the mesh islands.

Embodiments of the present invention solve problems experienced by mesh networks concerning loop formation where two nodes are connected by both a wired and wireless link. The present invention prevents or ‘breaks’ a loop that that would otherwise result in continually repeating and delayed network data transmission.

The invention discloses an automatic boundary layer calculation-orientated two-dimensional hybrid grid generating method, which comprises the following steps: embedding an input closed curve into triangular meshes by means of a restriction Delaunary triangularization method to obtain topological approximation edges approximating these curves and triangular meshes inside the curves, outwards propelling a topological approximation edge set as a boundary curve, automatically capturing a topological structure of the propelled new boundary and filling a quadrangular mesh of a propelling region to finally obtain a quadrangular / triangular hybrid mesh meeting the condition and the quality requirement. The automatic boundary layer calculation-orientated two-dimensional hybrid grid generating method is simple and easy to realize, good in reliability, and capable of automatically treating the boundary topological change and collision problem in an propelling process, has no special requirement for an initial two-dimensional closed curve, adapts to the requirement of dense computational grids required by large velocity gradient change in a flow field around a boundary layer, can generate an unstructured triangular mesh with flexible scale change in a place far away from the boundary layer, and can provide the high-quality mesh for correlation calculation of computational fluid mechanics.

A hybrid mesh belt having a mesh portion with side edges attached to modular plastic chains. The chains are provided with cavities on the bottom side. The cavities are suitable for engaging with driving sprockets that engage with the chains.

The invention discloses a region-division-based spatial complex horizon reconstruction method. The horizon reconstruction in three-dimensional geological modeling under the complex topography conditions such as multi-fault overlapping can be realized without the needing of a fault polygon; simultaneously, the dynamic control of specified grid spacing is realized by a hybrid grid interpolation method, so that a geologic structure can be expressed finely; the reconstructed geologic horizon surface and the fault are closed strictly; and the processing, such as blocking processing, in later geological modeling is facilitated.

A system and method for interconnecting multiple mesh transport medium technologies is disclosed. Two nodes are part of a mesh sub-network using a first access technology. The two nodes have at least two paths using the first access technology that couple the two nodes together. A third path using a second access technology also couples the two nodes together.

The invention relates to a hybrid mesh partition method in the field of electronic technologies, in particular to the hybrid mesh partition method with the design of integrity of a system-level packaging power supply. The hybrid mesh partition method comprises the following steps: (1) decomposing an irregular power supply / ground plane into a series of convex polygons by utilizing convex partition treatment; (2) obtaining an optimal rectangular mesh based on the recursive partitioning technology of the rectangular mesh, setting auxiliary ports on sides of the rectangular mesh, and establishing the transfer impedance relationship among the ports; (3) adopting a triangular mesh to fill the remaining structure, and carrying out modeling of an equivalent circuit for the triangular mesh; (4) establishing the electrical relationship among the ports at an interface of the rectangular mesh and the triangular mesh; and (5) solving simultaneous overall equations. The hybrid mesh partition method has the advantages of a wide range of applications, few internal nodes, high analysis precision and efficiency and the like.

The invention discloses a modeling and simulating method of a carrier-based aircraft seat strap restraint system, and belongs to the field of aviation biomechanical simulation. Firstly, a finite element model of a seat is built by referring to a certain type of carrier-based aircraft through three-dimensional modeling software and a hybrid grid; the initial state of a Hybrid 3 type dummy model is set according to a standard posture; a hybrid safety belt mode is used, a multi-body model is used from a tensioning mechanism to the shoulder, and the finite element model is used on rest portions; then, the seat, a dummy and a strap model are combined into a human seat strap system model, a seat back inclination angle is set according to the posture in an actual carrier-based aircraft, it is assumed that the seat and the aircraft are in rigid connection, and the contact between the seat and a person and the contact between the seat and the strap are established; finally, according to the blocking carrier landing accelerated speed of the actual carrier-based aircraft, an accelerated speed curve of a bottom plate serves as an input curve of simulation analysis to be applied to the bottom of the seat and input to a calculation model for simulation calculation. The method is capable of evaluating the restraint effect of the strap system and safety risks to pilots.

The invention discloses an arbitrary high-order hybrid grid time domain discontinuous Galerkin method based on a multistage local time stepping technology. According to the method, a Maxwell equationset is selected as a basic numerical model; an arbitrary high-order derivative (ADER) time stepping scheme is combined; a computational domain is divided by adopting a reasonable tetrahedron / hexahedron hybrid grid; each subdivision cell respectively and automatically determines a proper time iteration step length according to a stability condition; iteration updating can be carried out on a plurality of time iteration step lengths and each cellular electromagnetic field quantity in any proportion according to the own time iteration step length until all cellular field quantities are iterated to a specified time point, and the obtained time-varying electromagnetic field quantity is post-processed to obtain a corresponding S parameter, a radar scattering sectional area and electromagnetic field spatial distribution. According to the method, the problem that the calculation efficiency is low due to the fact that the time step length of a time domain electromagnetic analysis method is limited by the minimum discrete grid size is solved, the calculation precision is improved, the calculation time is shortened, and the method is particularly suitable for rapid analysis of the space multi-scale electromagnetic problem.

An embodiment in accordance with the present invention provides a device for use in a cranioplasty including a first mesh, wherein a structure of the first mesh has a generally rigid, contoured configuration. The device also includes a second mesh, wherein a structure of the second mesh has a generally malleable, contoured configuration. The first mesh and the second mesh are also seamlessly integrated into a hybrid mesh. This design allows for rigid structure in certain regions of the implant and customization and malleability in other regions.

In a wireless or hybrid mesh communication system, radio frequencies are managed by assigning an in-use frequency channel to each local family of nodes, distributing spare frequency channel(s) among the local families of nodes, and changing the in-use frequency channel of at least one selected local family of nodes to a new frequency channel selected among its spare frequency channel(s), if any, or among the spare frequency channel(s) of another local family of nodes if said at least one selected local family of nodes has no spare frequency channel(s), and / or as the in-use frequency channel of another local family of nodes if none of said local families of nodes has spare frequency channel(s).

This method for evaluating fluid flows in a heterogeneous medium, uses a hybrid grid constructed from a CPG type structured grid and from a radial grid. The first stage includes locally deforming a CPG type grid into a non-uniform Cartesian grid. These local grid cell deformations correspond to the change from a “CPG” frame to a “Cartesian” frame defined by the deformation. These deformations are then quantified, by a deformation function φ, and applied to the radial grid so as to shift to the “Cartesian” frame. The second stage includes locally correcting the definition of this deformation function around the radial grid, so that the radial grid, in the “Cartesian” frame, keeps its geometrical characteristics. A hybrid grid is then generated in the “Cartesian” frame from the two grids thus deformed. Finally, this hybrid grid is deformed to return to the “CPG” frame, using the inverse of deformation function φ.

The numerical analysis system of the invention analyzes the dynamical state of the compressible fluid employing Hybrid Grid Adaptation Method by Finite Volume Method. The initial grid data are created by way of free combination of tetrahedral cells, hexahedral cells and pentahedral cells. The divide-delete index is calculated according to the density of the fluid in each cell. A triangular face of the cell is divided into triangular faces and the quadrilateral face is divided into quadrilateral faces when the cell is divided. The cell is divided only when three conditions are satisfied. The first condition is that the volume of the cell is greater than the minimum volume. The second is that the dividing level of the cell is not the maximum level. The third is that the divide-delete index is greater than the dividing threshold. The cell is recovered to the former undivided cell by deleting and merging divided cells when the cell is not the initial cell and the divide-delete index is less than the deleting threshold. As the freedom of the grid creation is high, the suitable cells are easily created and the calculation efficiency becomes high.

A hybrid mesh belt having a mesh portion with side edges attached to modular plastic chains. The chains are provided with cavities on the bottom side. The cavities are suitable for engaging with driving sprockets that engage with the chains.

The invention discloses a rapid generation method of a hybrid grid. The method includes the steps of 1, performing processing before grid generation; 2, generating an octree Cartesian grid; 3, segmenting the octree Cartesian grid with a standard segmenting template to generate a hybrid grid; 4, calculating grid information of the hybrid grid and outputting the grid information. The problem of quickly generating the hybrid grid in computational fluid mechanics is solved; by means of standard temperature based segmenting, the hybrid grid can be automatically generated with no manual intervention or solving algebraic equations or differential equations.

System and method for increasing throughput and reducing the transmission delay in a hybrid mesh network. The hybrid mesh network including a plurality of physical mediums and a plurality of nodes linked over the plurality of physical mediums to form at least one route including a retransmitting node, linked over one physical medium with a preceding node and over other physical medium with a following node. The network is configured such that there is no link on anyone of the physical mediums between the preceding node and the following node, and each two nodes of the route with a link on one of the physical mediums do not have any links on the same physical medium with any other of nodes in the route. This enables the retransmitting node to start retransmitting a message received from the preceding node to the following node before completing receiving the message.

In an example embodiment, a technique is provided for reconstructing and analyzing a mesh surface based on a combination of 2.5D and 3D point data that involves building a hybrid spatial index whose nodes are labeled as containing 2.5D data or 3D data, and whose branching is adapted to such types of data. The hybrid spatial index is then used to reconstruct the mesh surface and analyze the mesh surface, taking advantage of more efficient algorithms adapted to specific types of data. The technique may allow for a hybrid spatial index that uses fewer nodes, and for use of 2.5D specific reconstruction and analysis algorithms for at least a part of the mesh surface.

The invention provides a fractured reservoir multi-scale fracture simulation method and a computer readable storage medium. The method comprises the steps that corner point grid model data, matrix attribute model data, fracture network model data and fracture attribute model data of a matrix are obtained; classifying and dividing the fracture network model into primary fractures and secondary fractures; constructing an unstructured basic grid based on the angular point grid model and the primary crack; utilizing a matrix attribute model and a crack attribute model to carry out attribute mapping on the unstructured basic grid; the matrix attribute of the mapped unstructured basic grid is corrected; and calculating the conductivity of the non-structured basic grid after attribute correction to obtain a non-structured hybrid grid model. By means of the simulation method, polarity discretization processing can be conducted on main-level cracks, flow characteristics of the cracks can be accurately captured, the precision of numerical simulation is improved, equivalence and coarsening methods are adopted for small and medium-scale cracks, and the efficiency of numerical simulation is greatly improved.