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In this paper, a hybrid domain decomposition method with electric and magnetic current combined-field integral equation (JMCFIE) is present for modeling electromagnetic scattering problems involving composite structures. The method first decomposes the original problem into several sub-domains according to its geometry and dielectric parameters. JMCFIE serves as the sub-domain solver in which a well-posed...
An optimized conformal finite-difference time-domain (FDTD) (2, 4) method is proposed for calculating reflected, diffracted, and total fields of two- and three-dimensional (2- and 3-D) perfectly conducting (PEC) wedges with an electromagnetic pulse (EMP) incidence, where one low-cost coefficient-modification (CM) technique is implemented for effectively reducing its numerical dispersion error. For...
Traditional equivalent source reconstruction methods are only operating at a single frequency point each time. However, for wide band radiators, their computation cost of the source reconstruction increases linearly with the number of frequency points. In this paper, a wide-band equivalent source reconstruction method (WB-SRM) based on the Neville-type Stoer-Bulirsch (SB) algorithm is developed. Supported...
In this paper, a new single-source equivalence principle algorithm (EPA) is proposed to solve array structures. In the traditional equivalence principle algorithm, the unknown currents of the scatterers are replaced by equivalent electric and magnetic currents on the virtual equivalence surface. In single-source EPA, a single electric/magnetic current on the equivalence surface is used to generate...
In this paper a numerically efficient strategy for solving the scattering problems from multiple Bodies of Revolution(BoR) is described. This approach is based on the method of moment(MoM) expand by BoR basis function. By using a current coefficient transform algorithm, the BoR halfglobal basis function is applied in multiple objects problems. As a result, the CPU time is reduced compared with RWG...
In this paper, we present an association rule-based bilateral multi-issue negotiation model which uses association rules to describe the interdependence of issues. Moreover, we propose a novel time-dependent negotiation strategy which based on association rules. In the negotiation process, agent can adjust the associated issues' value intervals and negotiation time dynamically according to the corresponding...
A special simulation model for the surge responses of ZnO varistors is introduced in this paper. This model is based on the Voronoi network and contains the actual conduction mechanism of the grain boundaries, as well as the capacitances of the grain boundaries. The surge responses of the actual varistor samples were simulated and compared with the experimental results. The simulated waveforms agree...
In this paper, the integral equation - fast Fourier transformation (IE-FFT) with grid-robust higher order vector basis functions is presented. The magnetic field integral equation (MFIE) is used for solving scattering from three-dimensional closed perfectly electric conductor (PEC). Conformal mesh is required for traditional basis function based on common edges between adjacent elements. This is very...
An overlapped domain decomposition method with congruent sub-domains is developed for electromagnetic surface integral equations. Based on congruent sub-domains, the proposed method creates a set of uniform mesh such that all the self-matrices on the congruent sub-domains share an interior-interior sub-matrix, which can reduce the memory requirement and the matrix filling time, intensively, especially...
In modern CNC machining, the interpolation of complex profile curve with high speed and high accuracy is required. Based on B spline curve theory, a revised algorithm of cubic B spline curve interpolation is presented in the paper. This proposed algorithm gives a new method which is based on pre-judgment of machining feedrate to calculate the tangent vectors of spline curve junction. The tangential...
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