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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:; l! n. Y( \  ~6 S8 M- s) J
约束条件是在上面的Table里面直接输入最大最小值吧。% Q# w& T+ X# Y' `: E
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).# W: Y% G: _. r' ]0 U

' I/ `* W4 ?- T& H/ NMaximum 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).
- T  C7 M. w2 o# q0 G8 M; o下面的Equation栏里面应该写入目标函数吧。# X! V( v! I$ s1 U3 Z' L7 _
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
$ M* |1 V& i3 w4 Y不等式都是在条件里面如; @: g/ u' u; N" _% E% C( [1 L7 H
if (DelTankSize >= 6000 && DeliveryTimes < 60)1 g: a/ W, u% F0 L% L+ C) B6 C
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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