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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:
/ j' k2 K6 \" _# b+ F8 N8 n! G约束条件是在上面的Table里面直接输入最大最小值吧。% B& k( c, I# e# E: I
Minimum 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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5 J* V2 t* v' L. XMaximum 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).3 k0 Q0 |+ a" W. ?! }
下面的Equation栏里面应该写入目标函数吧。. R# F/ h" P$ f
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 ! a" G0 ?  x  G% Z7 n: Y9 ]2 b* ~, t
不等式都是在条件里面如4 i" v( V! g) B7 U# e
if (DelTankSize >= 6000 && DeliveryTimes < 60)
3 w: j2 ~& r% Q& {1 {4 K! aReject = 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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