A PRECONDITIONED COCG METHOD FOR SOLVING COMPLEX SYMMETRIC LINEAR SYSTEMS ARISING FROM SCATTERING PROBLEMS

被引：7
|
作者：
Li, L. [1 ]
Huang, T. -Z. [1 ]
Ren, Z. -G. [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Appl Math, Chengdu 610054, Sichuan, Peoples R China
来源：
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2008年 / 22卷 / 14-15期
关键词：
D O I：
10.1163/156939308787537793
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we study a class of modified incomplete LDL(T) preconditioners followed by the conjugate orthogonal conjugate gradient (COCG) method for solving the large complex symmetric system with linear equations Ax = b, arising from the scattering problems. The preconditioner is derived from the incomplete Cholesky factorization with diagonal compensation. With an ordering scheme, our factorized preconditioners can reduce the memory requirement as well as the COCG iteration numbers. Numerical tests on harmonic analysis for plane wave scattering from a metallic plate and a metallic sphere coated by a lossy dielectric layer show the efficiency of our method.
引用
收藏
页码：2023 / 2034
页数：12
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