In addition, by use of Arnoldi decomposition an approach to construct initial orthogonal subspaces is put forward by which the calculation efficiency of Jacobi-Davidson method at the early iteration stage can be improved.

• 另外提出了在Jacobi-Davidson方法中用Arnoldi分解构造初始正交子空间的方法,提高了该方法在迭代初期的计算效率。