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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:( F% d0 m% g# X6 o& s
约束条件是在上面的Table里面直接输入最大最小值吧。/ B$ A# p7 T! [+ p' r' n; `
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).
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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).
! f0 I' j$ X+ d+ b下面的Equation栏里面应该写入目标函数吧。
+ P( e  |& ?; O. RMaxProfit (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 6 D5 J5 x6 K6 ]% V+ l: ?- I0 q
不等式都是在条件里面如
! G) g" Z2 t1 d3 D4 n2 X5 O5 S9 A) lif (DelTankSize >= 6000 && DeliveryTimes < 60)4 c" t+ X+ R, X- D7 b* L$ G5 P
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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