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

极值矿山微震发生的空间部位与高应力区密切。

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.

像重建常常转化为解非约束极值问题,通过范数极小化推导出共轭梯度法的一般算法。