偏最小二乘法，它通过最小化误差的平方和找到一组数据的最佳函数匹配。 用最简的方法求得一些绝对不可知的真值，而令误差平方之和为最小。 很多其他的优化问题也可通过最小化能量或最大化熵用最小二乘形式表达。-Partial least squares method, which by minimizing the square error and one set of data to find the best matching function. The simplest method to obtain some of the absolutely unknown true value, and make the sum of squared errors is minimized. Many other optimization problems can be expressed by the least squares in the form of energy by minimizing or maximizing entropy.