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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+ n% y* z7 H0 {* L( e. O- L
约束条件是在上面的Table里面直接输入最大最小值吧。7 m: _8 ]9 K" x0 j
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).# O! @. D  ?) c4 Y5 Z3 ~# j" i

! l0 \. _8 a2 o+ HMaximum 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).
4 e, Y; H: O! S) u8 x下面的Equation栏里面应该写入目标函数吧。
4 D6 e! M% Z  c8 jMaxProfit (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 7 E$ B( S8 j. V* e& h3 |
不等式都是在条件里面如
' q* p$ n9 }+ ?; cif (DelTankSize >= 6000 && DeliveryTimes < 60)' g; G: S/ o) q; @- M. X6 y' {  [
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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