最速下降法又称为梯度法，是1847 年由著名数学家Cauchy 给出的，它是解析法中最古老的一种，其他解析方法或是它的变形，或是受它的启发而得到的，因此它是最优化方法的基础。作为一种基本的算法，他在最优化方法中占有重要地位。-The steepest descent method called gradient method, is 1847 by famous mathematician Cauchy given, it is the most ancient of analytical method, other analytical methods or its deformation, or inspired by it for, and thus it is the foundation of optimization method. As one of the basic algorithm, he in optimization method plays an important role.