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根据工程设计的需要,为研究产品的合理流量流向,以及合理选择加工厂厂址等问题,笔者编制了三个实用程序,使用效果良好。现将程序概况简介于后。 (一)线性规划“运输问题”计算程序 “运输问题”是线性规划问题的一种特例,其特点是约束变量多。若采用单纯形法,虽可求解,但因每个变量都要占用内存单元而使解题规模受到限制。“运输问题”解法只需列入基变量即可,这样节省内存,从而
According to the needs of engineering design, in order to study the reasonable flow of product flow, as well as the reasonable choice of processing plant site and other issues, the author prepared three utility programs, the use of good results. The program outline is introduced later. (I) Calculation program for “transportation problem” in linear programming The “transportation problem” is a special case of the linear programming problem. It is characterized by many constraints. If the simplex method is used, although it can be solved, the size of the problem is limited because each variable occupies a memory unit. The “transport problem” solution can be simply a base variable, saving memory