1.The space of the extremum mine microseism is closely connected with the high stress zones.

1.极值矿山微震发生的空间部位与高密切相关。

2.Image reconstruction is often converted to the nonrestraint extremum of the nonlinear equations.We have deduced a conjugate gradient algorithm from the extremum of norm.

2.图像重建常常被转化为解非线性无约束极值问,通过范数极小化推导出共轭梯度法的一般算法。

3.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.

3.实验结果，抽样方法可以有效地减少局部极值点，提高归一化互信息测度的收敛性能。