中文说明：应用L-曲线法来选取正则化参数α的合理性就是L-曲线法强调保证解部分||x||2和数据拟合部分||Kx-y||2的平衡，而这种平衡则是通过确定正则化参数α值来实现的。不过值得注意的是，利用L-曲线法所得到的正则化参数α并非最优值，而是近似最优。
English Description：
Application of the L-curve method to select the regularization parameter alpha rationality is the L-curve method emphasize that part ||x||2 and data fitting ||Kx-y||2 balance, and the balance is is by determining the regularization parameter alpha value to achieve. But it is worth noting that the L- curve method is used to get the regularization parameter is not the optimal value, but the approximate optimal.