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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:) f0 C( h& @# F0 B% C& l
约束条件是在上面的Table里面直接输入最大最小值吧。  D; w; t, N# F3 n' _9 O& [
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).  X# Z2 v: e$ {2 h

4 F( K* t# T3 p8 P- {) U$ sMaximum 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).
* T3 A. |$ P# R' ~( s# c下面的Equation栏里面应该写入目标函数吧。) o$ D) }6 a% G7 ]& T# w$ |; _" e+ J
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 8 w5 @' ~! ~7 i$ i6 H/ w. w. E8 o
不等式都是在条件里面如
0 F- F( q+ J/ y# O6 yif (DelTankSize >= 6000 && DeliveryTimes < 60)
/ _4 u. D! g4 V5 ?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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