说明：  当数据维数相对较高时，普通的最小二乘方法存在计算问题，该文件给出了两种解决方法：PLS和岭回归方法，并可以看出二者效果差异
(When the data dimension is relatively high, the ordinary least squares method of calculation problem exists, the document gives two solutions: PLS and ridge regression methods, and results can be seen that the difference between the two)