说明：  如果目标函数或约束条件中包含非线性函数，就称这种规划问题为非线性规划问 题。一般说来，解非线性规划要比解线性规划问题困难得多。而且，也不象线性规划有 单纯形法这一通用方法，非线性规划目前还没有适于各种问题的一般算法，各个方法都 有自己特定的适用范围。
(If the objective function or constraints contain nonlinear functions, it is called a nonlinear programming problem. Generally speaking, solving nonlinear programming is much more difficult than solving linear programming problems. Moreover, unlike the simplex method in linear programming, there is no general algorithm suitable for all kinds of problems. Each method has its own specific scope of application.)