中文摘要：

研究了广义鞍点问题新的块预条件子，给出了预处理后矩阵特征值的一些性质．数值例子表明，新的预条件子是非常有效的．

英文摘要：

In this paper, we consider block diagonal preconditioners for solving saddle point linear systems; we show properties of eigenvalues of the preconditioned matrix. Finally, numerical experiments are also reported for illustrating the efficiency of the presented preconditioners.