894 results about "Mesh point" patented technology

A method for providing the layout design of semiconductor integrated circuit that is capable of promoting the reduction of the circuit pattern area is provided. A hole pattern is disposed at the mesh point which is an intersecting point of mutually orthogonal virtual grid lines and another hole pattern is not disposed at the adjacent mesh point that is the mostly closed mesh point having the hole pattern thereon.

The invention discloses a CFD (computational fluid dynamics)/CSD (circuit switch data) coupled solving nonlinear aeroelasticity simulation method, comprising: firstly, carrying out calculation initialization; then solving the CFD of unsteady aerodynamic force; converting boundary load information; solving the CSD of nonlinear structure dynamic response; judging whether to exist computation or notby taking the response of structural finite-element mesh point displacement as a convergence criteria; if not exiting, carrying out the dynamic mesh deformation of a flow field after the surface displacement information of a computation model is converted; and then, continuing to compute until the convergence criteria is satisfied, thus finishing computation. By means of the simulation method disclosed by the invention, the problem of pneumatic nonlinearity and structural nonlinearity coupling and the problem of geometric large deformation dynamic mesh can be solved; and the simulation methoddisclosed by the invention can be applied on the nonlinear aeroelasticity analysis of aerospace aircrafts and the nonlinear aeroelasticity analysis of civil high-rise buildings and bridges.

A method of hybrid route discovery in a mesh network is described. The method comprises the optional designation of a root node of the mesh network and formatting a route request message at an originating mesh point, where the route request messages include a hop limit parameter. If a root node has been configured, the route request is responded to with a message that describes the route to the root. If a direct route between two nodes is required, the route request message is broadcast from the originating mesh point, and the hop limit parameter limits the number of times the route request message will be forwarded. The originating mesh point receives a unicast route reply message from a neighboring mesh point, after the neighboring mesh point received the route request message. Finally, a route connecting the originating mesh point and the destination mesh point is established.

A method for modeling optical scattering includes an initial step of defining a zero-th order structure (an idealized representation) for a subject including a perturbation domain and a background material. A Green's function and a zero-th order wave function are obtained for the zero-th order structure using rigorous coupled wave analysis (RCWA). A Lippmann-Schwinger equation is constructed including the Green's function, zero-th order wave function and a perturbation function. The Lippmann-Schwinger equation is then evaluated over a selected set of mesh points within the perturbation domain. The resulting linear equations are solved to compute one or more reflection coefficients for the subject.

A method, apparatus and system for communicating in a wireless mesh network may relate to a mesh point observing beacon transmissions of one or more neighboring mesh points and dynamically determining if and when to transmit its own beacon based on these observations. Determining when to transmit the beacon may be performed without time synchronization between the one or more neighboring mesh points and be dynamically selected based on the observed transmission time pattern of the neighboring mesh points. Various additional details and embodiments are also disclosed.

In a wireless communication system, a method for commissioning and managing communication between a plurality of mesh points (MPs) comprises a first MP broadcasting a signal to a second MP to establish communication with the second MP. The second MP transmits a response signal to the first MP. The first MP authenticates the second MP and determines a master MP, and the first MP establishes the communication with the second MP.

The invention discloses a backlight module based on a quantum dot light guide plate, and the backlight module comprises a light source, a light guide plate, an optical module arranged above the light guide plate, and a reflective sheet arranged below the light guide plate, wherein the thickness of the light guide plate is in the range from 0.1 to 6mm, the lower surface of the light guide plate is provided with light guide mesh points which are made from a composite material including quantum dots and diffusion particles, and quantum dot lights stimulated by the light source and light source lights are compounded into white lights. In the backlight module, the quantum dots are added into the light guide mesh points so that monochromatic lights can be converted into the white lights, the backlight module has the following advantages of excellent heat dissipation, wide tonal range and high luminous efficiency. In preparation, only a silk screen printing slurry is changed instead of changing traditional processes for manufacturing the backlight module.

A portable data terminal (PDT) adapted to participate in a wireless mesh network including a plurality of peer PDTs can comprise: a PDT module including an encoded information reading (EIR) device, and a mesh point (MP) module communicatively coupled to the PDT module. The MP module can include a microcontroller and at least one wireless communication interface and can be configured to perform IEEE 802.11-conformant wireless station services including authentication, de-authentication, privacy, and MAC service data unit delivery, and IEEE 802.11-conformant wireless distribution system services including association, disassociation, distribution, integration, and re-association. The MP module can be further configured, responsive to receiving a MAC frame addressed to a recipient inside the wireless mesh network, to deliver the MAC frame using the distribution service. The MP module can be further configured, responsive to receiving a MAC frame addressed to a recipient outside of the wireless mesh network, to deliver the MAC frame using the integration service. The MP module can be further configured to route an incoming MAC frame according to its destination address and the frame control field. The MP module can be further configured to cause the PDT module to exit said sleeping state responsive to receiving a mobile management software (MMS) wake-up command.

The invention discloses a method, a device and a system for the authentication and key distribution of a wireless mesh network. The authentication method mainly comprises the following steps that: MPP (Mesh portal point) equipment receives an authentication request sent by an MP (Mesh point) initially accessing the network; the MPP equipment forwards the authentication request to AC equipment and the AC equipment sends the MP authentication information in the authentication request to an authentication server; and the AC equipment receives MP authentication result fed back by the authentication server and forwards the authentication result to the MPP equipment, and the MPP equipment transmits the authentication result to the MP. The invention provides a manageable and operable safe framework of the Mesh network, and provides an effective authentication and key distribution method to effectively establish associated links between MPs to ensure the safe transmission of link layer data.

The invention discloses a structural finite-element parametric modeling method applicable to a grating-configuration rudder surface. According to the method, a mapping transformation method based on a finite element model and a parametric approach to achieving conversion from two-dimensional mesh parameterization division to three-dimensional appearance expansion are adopted. The method includes the steps of specifically conducting two-dimensional plane projection on the grating-configuration rudder surface, extracting characteristic parameters, and conducting two-dimensional parameterization division; building a mapping relation between a two-dimensional finite element mesh and a three-dimensional finite element mesh, designing a numbering rule for finite element mesh points, and achieving conversion from the two-dimensional mesh to the three-dimensional appearance expansion; by means of a high-level computer language program, implementing the structural finite-element parametric modeling procedures for the grating-configuration rudder surface. By using the method, in a conceptual design phase or a preliminary design phase, the structural modeling efficiency can be greatly increased, the costs of time and manpower are low, parameters of self-compiled programs can be adjusted quickly, analysis applicability is high, the obtained model is applicable to analytical calculation of structural vibration, structural dynamics and the like, and the method is applicable to grating-configuration rudder surfaces and grating-configuration airfoils.

The invention provides a light guide plate and a backlight module. The light guide plate comprises a bottom surface, a light entering surface and a light emitting surface, wherein the light emitting surface is arranged opposite to the bottom surface; the bottom surface comprises a plurality of mesh points; the mesh points comprise fluorescent powder; and scattered particles are added selectively. Phenomena such as color offset caused by accelerated aging of the fluorescent powder which is close to a light-emitting diode (LED) chip and reduction in light emitting efficiency are avoided.

The invention discloses a physical distribution consignment supervisory system and a supervisory method implemented by the system. The system comprises special information acquisition equipment used for quick surface list scanning and surface list information acquisition and a supervisory information system connected with the special information acquisition equipment. The method comprises a mesh point data acquisition process, an image data digitalized processing process, a standard mass data storage and a processing process, and information supervision and application process. The supervisory system and the supervisory method disclosed by the invention are unprecedented in the physical distribution and consignment industry at present. The technical key is as follows: a special machine for information acquisition specialized in physical distribution consignment industry is adopted; simultaneously, a physical distribution consignment information system comprises information acquisition, information centralization, information processing and information application; and moreover, a server system specialized for the physical distribution consignment information system further comprises cloud access, storage, counting, and the like.

Embodiments of the present disclosure provide for configuring and managing mesh nodes during occasional failure of mesh nodes or addition of new mesh nodes. The disclosed system first determines whether a mesh node is a mesh portal or a mesh point. If it is a mesh portal, the mesh node will advertise its capacity as a mesh portal to other mesh nodes in the network. If it is a mesh point, the mesh node attempts to automatically recover connection to the wireless mesh network if it identifies a unique wireless network based on its associated network identifier. If more than one network identifiers are discovered, the mesh node delays establishing connection to the wireless mesh network until a selection is received.

The invention provides a micro-earthquake focus rapid positioning method based on an arrival time difference database, and belongs to the earthquake focus positioning technology field. The micro-earthquake focus rapid positioning method comprises the steps that a geological numerical model of a monitoring area is established, and mesh division is carried out, and every mesh point is adopted as a characteristic earthquake focus point; by combining with the characteristic earthquake focus point, a sensor position coordinate, and an earthquake focus wave speed, a characteristic earthquake focus point arrival time difference database is established; by using a waveform information acquisition system, the time of the earthquake source waves arriving at different sensors is extracted from waveform signals received from the sensors; the arrival time difference between any two sensors is calculated, and the arrival time difference matrix of the earthquake focus is established, and the matching searching of the arrival time difference matrix and the characteristic earthquake focus point arrival time difference database is carried out to realize the real-time rapid positioning of the earthquake focus. During an actual micro-earthquake monitoring project, the characteristic earthquake focus point arrival time difference database is established in advance, and the function optimization iteration solution of the earthquake focus is not required, and therefore time required by the earthquake focus positioning is greatly reduced, and rock mass engineering dynamic disaster early warning time is effectively reduced.

The invention discloses a method for meshing point cloud data. In the method, aiming at discrete point cloud data obtained by laser scanning, an automatic global parameterization method with strong robustness is provided, and a parameterization result is used for directly acquiring a meshing result which is consistent with a main direction and can reflect intrinsic geometric characteristics of a model. The meshing result has two forms, i.e., the meshing result can be wholly formed by quadrangles, or formed by triangles. By using the method, only the point cloud data of the model is used, prior triangulation is not needed to perform point cloud data meshing, the processing procedure is completely automatic, point clouds containing noises can be processed without manual intervention, and the density level of quadrangle meshing can be quickly controlled through parameters to obtain quadrilateral meshes or triangular meshes with various resolution ratios.

The invention relates to a high-efficiency global optimization method using adaptive radial basis function based on fuzzy clustering, belonging to the technical field of modern engineering optimization designing. The method comprises the following steps: gradually constructing a proxy model of a complicated analysis model relating to an engineering design problem by the adaptive radial basis function; classifying the function values of a proxy model on a known mesh point aiming at the proxy model by adopting a fuzzy clustering method; searching a key area which is possibly saved to the global optimal point; and optimizing the proxy model by using the global optimizing algorithm in a small range in the key area until the optimal value of the engineering design problem is acquired. The optimization method overcomes the defect of time-consuming operation when the traditional global optimization method is used in the engineering design problem, can effectively reduce operation cost, improve optimization efficiency, is advantageous to shortening the period of engineering optimization design, and has the capability of global searching.

The embodiment of the invention discloses a 3D face model reconstruction method and device, which can improve the accuracy and the speed of reconstructing the three-dimensional human face model. The method comprises the following steps: S1, acquiring a face depth map and a face color map to be processed, inputting the face depth map and the face color map to be processed into a pre-trained rough learning network to obtain parameterized three-dimensional face model coefficients, and determining an initial three-dimensional face model according to the parameterized three-dimensional face model coefficients; S2, converting the initial three-dimensional face model and the brightness value on the face color map into a four-channel UV picture, inputting the UV picture into a pre-trained fine learning network, and obtaining the offset of each mesh point of the three-dimensional face model to be reconstructed in the respective normal direction; S3, reconstructing a three-dimensional face modelaccording to the parameterized three-dimensional face model coefficients and the offset of each mesh point in the respective normal direction.