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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:
; [3 j, w- y4 N约束条件是在上面的Table里面直接输入最大最小值吧。: V* U% N2 O! c( z  [5 |9 m
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- b7 w  K' Y: f) B" b# h$ j0 ~9 L2 _
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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).
* i( J, Q- k* w3 i下面的Equation栏里面应该写入目标函数吧。
& O6 Y; y% x0 o6 m; B, vMaxProfit (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 ! A( `, _1 T. X; C  s" I& y  g
不等式都是在条件里面如# E* h7 B2 t& G
if (DelTankSize >= 6000 && DeliveryTimes < 60)# K8 |5 H6 K8 X1 e" N( m
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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