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[交流] 关于优化工具中约束条件的表达

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发表于 2009-5-21 16:44:46 | 显示全部楼层 |阅读模式
EXTEND中的优化工具中的约束条件如果是含有>=或者<=的数学式子,该如何表示?
发表于 2009-5-21 20:36:24 | 显示全部楼层
个人想法:2 Q. ~3 n1 P) C$ i  k
约束条件是在上面的Table里面直接输入最大最小值吧。
0 ]- g2 J& c* I+ k! X7 IMinimum Limit: Table Column 5: The minimum value that this variable can be set to by the Optimizer block. If it is entered without a decimal point, it can only assume integer values. Do not enter limits for variables that are used as results from the model (i.e. Exited from an Exit block).
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4 l  p7 P& t, q# G" h6 b" oMaximum Limit: Table Column 6: The maximum value that this variable can be set to by the Optimizer block. If it is entered without a decimal point, it can only assume integer values. Do not enter limits for variables that are used as results from the model (i.e. Exited from an Exit block).7 _! Q/ I1 }6 T! y; n
下面的Equation栏里面应该写入目标函数吧。" ]; w2 E. W5 \7 Y' n
MaxProfit (MiniCost)= Var0 + Var1 + Var2;
发表于 2009-5-22 16:37:01 | 显示全部楼层
哦,搞错了,抱歉 ( t2 p" a8 U/ B6 `
不等式都是在条件里面如$ h3 Y2 {, ?% H- d7 \2 W
if (DelTankSize >= 6000 && DeliveryTimes < 60)+ H% B1 ?! X$ s- @- G+ W" W
Reject = TRUE;  //  你的意思是这个地方是不等式的情况吗?手册里好像没有这样的说明。
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