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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:# d1 k) L* E" e1 g- ^4 D
约束条件是在上面的Table里面直接输入最大最小值吧。$ \* p) m4 y; y% F0 N8 e; ]2 F( [
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).
# q$ l$ Z9 }  C' f' p
, a# z8 x% z8 W7 C' T" h3 {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).
" k, F( s% Y1 e* n+ F8 V" y下面的Equation栏里面应该写入目标函数吧。
" @$ g. s- p! P, ?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
, \; v! n( J+ G" {) O. n0 x不等式都是在条件里面如. Z& z+ G( Q6 u0 y9 i  x% l
if (DelTankSize >= 6000 && DeliveryTimes < 60); H( m9 f7 P- s& B
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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