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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:/ Y& K- L: A/ X9 N9 B. c
约束条件是在上面的Table里面直接输入最大最小值吧。, r( b8 O) Q. X8 u- l4 Z, c0 A
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).
5 `4 _1 C2 D4 ]
9 O# L$ D8 N2 q0 f! JMaximum 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)./ W# F; I  U; U; i3 v6 \
下面的Equation栏里面应该写入目标函数吧。/ r$ ]/ }) G& i3 `
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; O: p, z2 |9 f: E
不等式都是在条件里面如
1 F$ K' z: e* @6 f3 N4 l# C  |if (DelTankSize >= 6000 && DeliveryTimes < 60)
+ |* W( d* u5 u0 j( g& BReject = 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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