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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 M4 i# L3 I1 X3 _7 C: n3 c约束条件是在上面的Table里面直接输入最大最小值吧。
  `5 _% a% y8 a; G. M/ v6 P1 fMinimum 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).
# q7 L/ z- y" P/ o* Q$ z" y+ e0 l1 U9 q" `
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).5 ]# C  h  f. s1 K
下面的Equation栏里面应该写入目标函数吧。
$ k6 o- Z" r' o- z$ _9 e, cMaxProfit (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 . F0 \" o2 o& @6 I# g  N/ L
不等式都是在条件里面如0 h/ X, n4 c+ {, P3 X* k
if (DelTankSize >= 6000 && DeliveryTimes < 60)5 C" w3 Y) _- n! p# B$ k
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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