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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:
( \. P4 p1 A& G* V% F7 T约束条件是在上面的Table里面直接输入最大最小值吧。. c4 s. a% a1 ~0 G; w) D
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).2 o/ ]5 @& u* d

5 p) N4 k+ n7 b! V1 DMaximum 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).5 p# t  W  x$ d
下面的Equation栏里面应该写入目标函数吧。, O& ]4 Z+ U/ d/ r( w5 }  @" |
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 : G, v2 s' |9 {3 C
不等式都是在条件里面如
# w" O( t  L5 A0 g7 g( C% e$ `: V: lif (DelTankSize >= 6000 && DeliveryTimes < 60)( a9 W7 \6 P3 O. w& F
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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