说明：  单纯形法是求解线性规划问题的通用方法。先找出一个基本可行解，对它进行鉴别，看是否是最优解；若不是，则按照一定法则转换到另一改进的基本可行解，再鉴别；若仍不是，则再转换，按此重复进行。
(Simplex method is a general method for solving linear programming problems. First find a basic feasible solution, its identification, to see whether it is the optimal solution If not, then switch to another according to certain rules to improve the basic feasible solution, then the differential If still yes, then re-converted, press repeated.)