Fujitsu Corporation

Peter Chow

Serban Georgescu

Tetsuyuki Kubota

Makoto Sakairi

James Alastair Southern

Sunil Keshavji Vadgama

Hidehisa Sakai

Sven Van Den Berghe

Kouji Demizu

Nicholas Wilson

Jose Albornoz

Muhammad Abdurrahman

Brent Walker

Jose Albonorz

A method of translating a Computer Aided Design CAD model of a product constructed for Computer Aided Engineering CAE analysis into a flexible form, the method comprising: converting the original CAD model into a different format to provide a new-format CAD model; providing visualization data including: an assembly tree extracted from the original CAD model, the assembly tree including each component of the assembly forming the product; and visualization information from the original CAD model for each assembly face in the assembly tree; and providing geometry information including matching information unambiguously identifying each assembly face; wherein the geometry information allows the assembly faces to be matched with the CAD faces in the new-format CAD model.

Flexible CAD format

A process migration method comprising executing a computer program using a group of parallel processes, each process carrying out a computation, the execution using current computing resources to provide current group data as a result of the computations, deciding to change the resources, and making a choice between increasing the resources; decreasing the resources; and moving to different resources, wherein moving to different resources can include increase, decrease or maintenance of the resources. The method comprising communication between the current computing resources and changed computing resources to allow the program to execute on the changed resources, the communication comprising migration of the execution to changed resources and synchronization of migrated group data with the current group data; wherein execution using the current resources overlaps in time with the communication.

Process migration method, computer system and computer program

A method and apparatus for searching a database of 3D items using descriptors created for each item and for the 3D computer-generated model or the 3D physical object. The descriptor comprises a vector string comprising each of the feature vectors extracted from the images, and dimension-related features each representing a dimensional feature. The descriptor is created by obtaining 2D rendered images of the model by rotating the model about each different axis independently, and extracting a feature vector representing features. The model is rotated about the axes in angular steps which may be the same for each axis. The axes may comprise three mutually-perpendicular axes, where each angular step is in the range from 30&#xb0; to 45&#xb0;.

Method and apparatus for searching a database of 3D items using descriptors

A method of Computational Fluid Dynamics CFD simulation for a product including a plurality of individual components, the method comprising creating a library of known components, including their component geometry and modeling properties needed for simulation, the components being individually meshed within the library; using a graphical user interface GUI to select and place a plurality of components from the library in a desired configuration to make up a CFD model of a product; and CFD simulating the model by scheduling a plurality of solvers, each solver modeling a component group comprising part or all of at least one component, to manage the time of action of the solvers and data exchange between the solvers.

Multi-component computational fluid dynamics simulations

In a meshing method for use in a computer-aided design (CAD) or computer-aided engineering (CAE) system, in which one or more serial meshing units are used to carry out a decoupled parallel meshing process in respect of all parts of a CAD assembly model, input parameters for the meshing process automatically, for each part to be processed, are set using live runtime information about the meshing process for the part concerned, such as information about the outcome of previous attempts to carry out the meshing process of the part.

Decoupled parallel meshing in computer aided design

Embodiments of the present invention provide a computing device configured to operate as a particular computing device among a plurality of interconnected computing devices, comprising: a load information obtaining unit configured to obtain, from the particular computing device and from the or each of a group of one or more other computing devices from among the plurality of interconnected computing devices, load information representing the current computational load of the computing device from which the information is obtained; and a load redistribution determination unit configured, in dependence upon the obtained load information, to determine whether or not to redistribute computational load among the particular computing device and the group, and if it is determined to redistribute computational load, to determine the redistribution and to instruct the determined redistribution.

Computing device, method, and program for distributing computational load

Process migration method, computer system and intermediate computing resources

A computer-implemented method of simplifying a geometrical model including through holes, by replacing perforations in the geometrical model, comprising: automatically identifying a potential group of perforations in a geometric model, and replacing the group of perforations with a porous replacement portion.

Computer-implemented method of identifying a group of perforations

A method, for use in meshing a CAD domain in a computer-aided design (CAD) or computer-aided engineering (CAE) system, comprises carrying out a procedure comprising: obtaining a set of mesh elements by extracting, from a previously-generated mesh of the CAD domain which has undergone a mesh element optimization process in respect of interior elements of the previously-generated mesh, mesh elements which do not satisfy a preselected mesh quality metric; decomposing the set of mesh elements into connected sub-meshes; carrying out a serial mesh element optimization process in respect of each sub-mesh independently and in parallel, under the condition that boundary nodes of sub-meshes are not moved, to obtain optimized sub-meshes; and obtaining an optimized mesh of the CAD domain by integrating the optimized sub-meshes into the previously-generated mesh.

Mesh quality improvement in computer aided engineering

A method of allowing inclusion of a structural component which is the confidential property of an owner in a third party remote product simulation, the method comprising, in owner modelling software: importing a component model including geometry of the component, mesh data and at least one material property of the component; encrypting a secure part of the component model which is to remain confidential to the owner using a software key, and leaving an interface part of the component model unencrypted; adding a restriction to the component model before the component model is exported, the restriction specifying simulation result data which is not to be visible to the third party; and exporting the partially encrypted component model to the third party for use in third party modelling software.

Methods and apparatus for including a confidential structural component in a third party remote product simulation

A process for the automatic creation of ad-hoc networks between mobile devices in emergency and evacuation events. During an emergency or an evacuation event a command centre () issues a special emergency warning to mobile network operators, in response to which the operators broadcast over the mobile network () a trigger message to the mobile devices (-) that they service. Receipt of the trigger message causes the mobile devices (-) in a given geographical area to search for their neighbours and to form groups each having a leader, subsequent communication between the group and the mobile network () being conducted via the leader, communications within the group being conducted for example by using Bluetooth or WiFi. In this way, both resources in the mobile network and battery power of the mobile devices are conserved.

Automatic ad-hoc network of mobile devices

A method for assessing wave propagation arising in a physical system by obtaining a numerical approximation of the physical system to be simulated, the method comprising

Simulation techniques

A method for assessing wave propagation in a physical system by numerical simulation; a computational domain comprises first grid cells with a first-grid time step, refined second grid cells with a second-grid time step, and intermediate grid cells of first-grid cell size and second-grid time step, with solution points located on the cells; obtaining values of a physical quantity after a first-grid time step at a solution point of one first-grid cell; using values from the first grid to obtain values at a perimeter of the intermediate grid; obtaining values of the physical quantity after the second-grid time step; using values from the intermediate grid to obtain the values at the perimeter of the second grid; using the values at the perimeter of the second grid, to obtain values of the physical quantity after a second-grind time step for solution points of the second-grind cell.

The application describes various techniques for improving the accuracy and numerical stability of computer-implemented simulations which employ subgridding techniques. In particular, techniques are described in which information is transferred across a common interface between two neighboring fine-grids. Furthermore, techniques are also described in which, during the update of a grid in regions where there exists an embedded fine-grid, the field values at co-located edges at which fine-grid solution points exist on the grid, are summed and used in an approximation of the gradient term required for the FD-TD updating stencils to perform an electromagnetic simulation.

Growing community of inventors

Kent, United Kingdom

Peter Chow