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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:
- a4 N9 U: J0 g, w$ h' V约束条件是在上面的Table里面直接输入最大最小值吧。! T6 L! {" u) [& h7 i# 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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, g8 n8 c; ?% E6 x1 ]( Y2 NMaximum 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).# A/ y: c3 \' }* o+ s# k+ N
下面的Equation栏里面应该写入目标函数吧。9 u% a! I. x* S' \; V5 [
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 9 w/ l" W$ y  s3 {0 T
不等式都是在条件里面如, m  K6 l0 t" P. b
if (DelTankSize >= 6000 && DeliveryTimes < 60): |8 r7 W" k2 o6 l" t+ `7 E9 R5 z
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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