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

极山微震发生的空间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极问题,通过范数极小化推导出共法的一般算法。