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Your search keyword '"Ding, D.Z."' showing total 2 results
Start Over Author "Ding, D.Z." Topic conjugate gradient methods
2 results on '"Ding, D.Z."'

1. FSAI preconditioned CG algorithm combined with GPU technique for the finite element analysis of electromagnetic scattering problems

Author

Xu, K., Ding, D.Z., Fan, Z.H., and Chen, R.S.

Subjects
*SPARSE matrices, *GRAPHICS processing units, *CONJUGATE gradient methods, *ALGORITHMS, *FINITE element method, *ELECTROMAGNETISM, *PARALLEL processing
Abstract

Abstract: In order to efficiently solve the large sparse complex linear system arising from the vector finite element method (vector FEM) in electromagnetic scattering problems, the factorized sparse approximate inverse (FSAI) algorithm and the programmable graphics processing unit (GPU) are employed in the context of the conjugate gradient (CG) iterative method. The combination of the FSAI with the GPU technique has two advantages. Firstly, the convergence rate of the CG algorithm is significantly accelerated. Secondly, the calculation of the sparse matrix vector product (SMVP) in the FSAI preconditioned CG algorithm is accelerated by harnessing the tremendous parallel processing capacity of the GPU. Numerical experiments indicate that the FSAI preconditioned CG algorithm enhanced by the GPU technique is very effective and can reduce both the number of iterations and the computational time significantly. [Copyright &y& Elsevier]

Published
2011
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2. Accelerated multi-physics analysis of electromagnetic energy selective surfaces with a space mapping algorithm.

Author

Li, C.Y., Zhang, T.C., Bao, H.G., Xiao, Z.L., Zhou, Y.H., Sun, Z., and Ding, D.Z.

Subjects
*ELECTROMAGNETIC waves, *NONLINEAR equations, *HEAT equation, *ALGORITHMS, *MICROWAVES, *CONJUGATE gradient methods
Abstract

In this paper, the multi-physical field-circuit co-simulation method coupling the Maxwell's and drift diffusion equations is proposed for the analysis of electromagnetic energy selective surface (ESS). To alleviate the universal feature that multi-physics simulation is extremely time-consuming, the space mapping algorithm is consulted and introduced into the transient calculation process. Thus, the searches for a convergent solution in nonlinear equations are regarded as an optimization procedure, which employs the mapped equivalent model to replace the high-cost multi-physics equations calculation. This operation can considerably minimize the number of multi-physics equations that must be computed, improving analysis efficiency. The great accuracy and efficiency of the proposed method are demonstrated by numerical results. As a result, this approach is an alternative tool to examine electromagnetic-circuit systems, particularly in high-power microwave scenarios. [ABSTRACT FROM AUTHOR]

Published
2023
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