摘要: 梯度下降法(Gradient Descent)是用于最小化代价函数的方法。When $a \ne 0$, there are two solutions to \(ax^2 + bx + c = 0\) and they are$$x = {-b \pm \sqrt{b^2-4ac} \over 2... 阅读全文
posted @ 2014-08-21 13:06 普兒 阅读(351) 评论(0) 推荐(0)