Modular and robust shock–geometry interaction algorithms for two-dimensional shock-fitting simulations

We compared the reconstruction performance of six different impedance tomographic reconstruction algorithms in a two-dimensional computer simulation. We found the modified Newton-Raphson method applied to the finite-element method performed the best. We show that this method can also make a better one step correction in less time than any of the other methods.

The complexity and large simulation time for switch level fault simulation has been addressed by performing two-dimensional parallel fault simulation using a parallel hardware accelerated fault simulator (PHAFS). The authors present an algorithm and complexity measure for parallel fault simulation as extended to the switch level. Using nine-valued logic, reverse level ordering, and the PHAFS, the switch level fault simulation complexity is reduced to O(L**2), where L is the number of levels of switches encountered when traversing from output to input. This computational complexity is far less than that of traditional methods, since it is polynomial with respect to the number of reverse levels in the circuit as opposed to the number of devices in the circuit. >

Jacquard weft-knitted fabric is a type of multilayer knitting fabric which has a stereoscopic surface with complex patterns. A computer simulation system was established, based on a virtual fabric Unity3D platform, to minimize the time required for computer simulation and to enhance the simulation results. The three-dimensional fabric data were unified and coordinate data were obtained to achieve the establishment. Three factors of simulation algorithm for jacquard weft-knitted fabric were used to establish and control the effect of a fabric model. By integrating three-dimensional model data, two-dimensional spatial data, and gray model, virtual simulation based on three-dimensional engine Unity3D platform was realized. Based on the real-fabric data, the final fabric patterns were predicted from macroscopic angle instead of two-dimensional and microscopic simulations. The system is proved to be more effective for the prediction and simulation of jacquard weft-knitted fabric and other fabrics having similar stereoscopic surfaces.