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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:! w% T7 @( a4 E3 G
约束条件是在上面的Table里面直接输入最大最小值吧。# t" J0 E) c; e' j% L/ [8 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).$ q( r6 f7 h4 k: q7 j- F+ W

8 Y& c, l, ?3 a. p: t3 [8 MMaximum 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).
* n) F9 I+ n& a' `; @9 ^. a% ^3 Y下面的Equation栏里面应该写入目标函数吧。1 a- {' g4 D1 O$ ?9 o3 j, Z" y
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 . z% I! `" _1 f! E  i3 D, ?3 V1 }
不等式都是在条件里面如
5 O# ?1 E% B, A0 {) `; E/ Gif (DelTankSize >= 6000 && DeliveryTimes < 60)6 h; X; C" J" g  i4 C1 |! \
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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