Department of Mathematics and Computer;
Gannan Teachers College;
Ganzhou 341000 China Department of Scientific Computing and Computer Applications;
Zhongshan University;
Guangzhou 510275 PRC;
Department of Scientific Computing and Computer Applications;
Zhongshan University;
Guangzhou 510275 PRC;
多级迭代法; 病态问题; Tikhonov调整; 线性系统; 收敛性;