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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:4 F! c" }- p9 s8 y8 j
约束条件是在上面的Table里面直接输入最大最小值吧。  h3 ^9 `% D* T" `. R" e4 C" u- ~
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).
/ U, k' o( b+ \) `" T) l; h7 B
' N7 d6 F! @1 o( E9 fMaximum 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).
; J/ }: T7 X9 q下面的Equation栏里面应该写入目标函数吧。' E/ S% G9 T+ Z
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 ' ^7 D& s) C( Y, q7 ~; `) b4 r- c
不等式都是在条件里面如$ `( r& s9 U  J, U+ N6 ^& w
if (DelTankSize >= 6000 && DeliveryTimes < 60)
. M$ k. E; J9 A0 U' B; V! l" i) q/ oReject = 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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