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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:
8 Q- `3 `: Y5 q( t* c1 }( O约束条件是在上面的Table里面直接输入最大最小值吧。
& M! n# b; p; f3 v" z+ j) eMinimum 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).
$ e7 `% }9 Y$ X: _  T9 x+ t" [+ t( b. P2 e
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).
$ o- P; r8 N4 ^. U$ Y- ~% }$ z  N下面的Equation栏里面应该写入目标函数吧。
# s: q! y% p& j" \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 / L* _& Z8 ]# l* B2 J! n6 ^' |
不等式都是在条件里面如
( ]/ D% ]7 w3 D7 d; n% n( K: W9 z" aif (DelTankSize >= 6000 && DeliveryTimes < 60). y5 j' D* d$ _- S
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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