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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:: P2 a4 j! G5 n1 D6 N
约束条件是在上面的Table里面直接输入最大最小值吧。
& `8 B* w5 ]. [% vMinimum 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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" E& i: e% S9 Q1 |Maximum 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).$ ]! P) N$ O) w, W3 Z
下面的Equation栏里面应该写入目标函数吧。% V9 i8 d; j0 r2 [
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
# N, U' V. S* E& `' K2 S" `! g8 n不等式都是在条件里面如7 U: `* S% X5 d( D! \& H' F9 s
if (DelTankSize >= 6000 && DeliveryTimes < 60)
- y+ f# ]7 |; ?+ U' N" h, A' Y1 M5 `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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