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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 @$ D& O5 y- @; t8 c) z, ?约束条件是在上面的Table里面直接输入最大最小值吧。& f* |% o& E5 g# x# o0 \5 ?
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).: Y& \1 G' G5 g7 G7 c- i

3 B# D- Y4 g6 M! z% g* m% R# H% zMaximum 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).' ^  k7 y4 V( E& k  e) D% E
下面的Equation栏里面应该写入目标函数吧。
$ _: |, G$ f! [2 a: AMaxProfit (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 8 z$ K! C9 j& _/ {  T  I2 \" Z( K
不等式都是在条件里面如
* R3 O- s/ w  Oif (DelTankSize >= 6000 && DeliveryTimes < 60)
  |2 {( J4 e. ?2 F0 c. a2 WReject = 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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