Least_squares 最小二乘法
https://en.wikipedia.org/wiki/Least_squares
動差估計法( MM, The Method of Moment )
最小平方法( LSQ, The Method of Least Square )
最大概似估計法( ML, The Method of Maximum Likelihood )
https://zh.wikipedia.org/wiki/最小二乘法
https://en.wikipedia.org/wiki/Least_squares