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

极值矿山微发生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.

图像重建常常被转非线性无约束极值问题,通过范数极小推导出共轭梯度法一般算法。