收敛的

Preconditioned con- jugate gradient algorithm is a fast and accurate computational algorithm.

预条件共轭梯法是一种精确并且敛迅速计算方法。

The results of tests show that the new subsampling method outperforms other subsampling methods in less extrema and convergence performance of the normalized mutual information.

实验结果表明，方法可以有效地减少局部值点，提高归一化互信息测敛性能。