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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:* m, l5 m8 Y1 X& ~
约束条件是在上面的Table里面直接输入最大最小值吧。
0 P  ]; C" T1 V/ G+ [& y$ [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).
6 T: q" x/ W: @% P- H- M1 V' z, R& x$ d: c
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).
" x# x* V: z0 Q, x下面的Equation栏里面应该写入目标函数吧。
" ~9 a. \4 s$ |7 j/ }/ q$ qMaxProfit (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 3 t0 m5 K! {5 {( w3 c
不等式都是在条件里面如4 h, S6 C# {: b# Q' H. y& b% U/ O
if (DelTankSize >= 6000 && DeliveryTimes < 60)9 b: G+ a9 {- ~( ^; O/ ~* x
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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