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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:) ]  X  c! Q% k
约束条件是在上面的Table里面直接输入最大最小值吧。
* Y6 z# t: K* \' }5 M, NMinimum 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).
- h" L6 [! v- _
6 J( [* Y( U) Y/ \5 uMaximum 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).9 z# c- N6 \, V) ^' X) Y: i
下面的Equation栏里面应该写入目标函数吧。
  U( w9 g2 `  Q. y3 [% w8 n& G  {' 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
1 G/ D( r( k% C8 Z不等式都是在条件里面如
, R8 d# I3 x7 ~3 D$ }if (DelTankSize >= 6000 && DeliveryTimes < 60)0 C/ K' k9 E1 k% D
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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