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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:
/ h4 _+ G& o* v, X9 v1 `约束条件是在上面的Table里面直接输入最大最小值吧。
& \. Y9 a# ]7 I- I& V# [( 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).- y( b% n- _5 S4 f
8 g6 Q; l$ {8 u& Z" P
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).
9 ]+ x; f* h- U# O- i+ S/ z" I下面的Equation栏里面应该写入目标函数吧。5 m! H/ ~/ U* ^4 |" s9 H8 y
MaxProfit (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 + n8 r  N  k: e
不等式都是在条件里面如  h2 z+ K- M3 c
if (DelTankSize >= 6000 && DeliveryTimes < 60)
* p0 p- S# S1 r' W8 O; T. YReject = 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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