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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:
: p7 R/ o& p/ B/ M5 @& A, k约束条件是在上面的Table里面直接输入最大最小值吧。! a/ j3 l8 Q+ ?9 ?! l# W
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).% Z8 o( E) V9 W
# x! v! I& ^6 E1 Z3 b" G/ [
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).  X- U) P3 ?2 z7 i
下面的Equation栏里面应该写入目标函数吧。
: R8 o1 g2 w! U8 J1 DMaxProfit (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
! q8 e' m; F' J+ D5 S不等式都是在条件里面如
# M3 N& S' K4 c5 f8 }- S+ c7 Bif (DelTankSize >= 6000 && DeliveryTimes < 60)& K+ J' [* y3 {8 g
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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