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

值矿山微震发生部位与高应力区密切相关。

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.

图像重建常常转化为解非线性无约束值问题,通过范化推导出共轭梯度法一般算法。