n.极小化；求最小参数值
This algorithm realizes the efficient clustering by minimizing the corresponding cost function iteratively. 该算法通过迭代优化，使得相应的代价函数最小化，最终得到有效的聚类结果。
The inverse solution was obtained through minimizing the object function using CGM based on the direct problem. 反问题的解在正问题的基础上通过共轭梯度法最小化目标函数得到。
