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《Journal of Chengdu University of Technology》 2002-05
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AN Hong-yan 1, CAI Jing-jiang 2, LI Xin 3, HE Yong-bin 1, FAN Xiao-tao 1, HE Yong-fu 1 (1.Chengdu University of Technology, China; 2.Shanghai Institute of ZTE Limited Company; 3.Panzhihua University, Sichuan)  
Based on proving the error estimate formula of conjugate gradient method(CG), this paper makes a pretreatment of coefficient matrix in order to improve convergence speed. This disposal provides the method of reducing the condition number of equivalence problem. So it perfectly establishes the practical algorithm of preconditioned conjugate gradient method(PCG). At last, taking the boundary value problem of Poisson equation as an example, this paper illuminates the validity of this method through numerical experiment.
【CateGory Index】: O241
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