preconditioning matrix meaning in English

预处理矩阵

Preconditioned matrix and its structure methods
预处理矩阵及其构造方法
For the first time in china the ebe - pcg and ebe - bictstab algorithin have been got by combining ebe technology with pcg and bicgstab , and precondition matrix on the basis of ebe has been attained
本文首次将ebe技术与pcg和bicgstab迭代法结合起来，得到并行的ebe - pcg算法和ebe - bicgstab算法，选取了基于ebe的预处理矩阵。
The main part of this hybrid algorithm is a chebyshev iteration which applies chebyshev polynomials to act on initial vectors and makes the obtained vectors close to the wanted eigenvectors ; the second one is the preconditioning subspace iteration method which uses a preconditioning matrix to impact the residual matrix obtained from the iteration procedure , so the distribution of eigenvalues is improved
第一个改进算法是用chebyshev多项式加速的子空间迭代法，它是用chebyshev多项式作用初始向量，使其更接近所要求的特征向量。第二个改进算法是对每次迭代所得的残余矩阵直接进行预处理以改善矩阵特征值的分布。