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

极值矿山微震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法一般算法。

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.

实验结果表明，新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收敛性能。