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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:5 y3 C" \+ e' Z( F- e' }# e* A
约束条件是在上面的Table里面直接输入最大最小值吧。* B' i4 o0 A- \8 l1 c
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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/ L& F9 X( t' A0 `% G7 t6 fMaximum 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).$ f( Z  [# o& V9 a+ a* C7 {
下面的Equation栏里面应该写入目标函数吧。$ `. t+ A4 P  X. `6 M
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' E0 k& ?( u8 A7 z+ S不等式都是在条件里面如- P4 c; w" h# R
if (DelTankSize >= 6000 && DeliveryTimes < 60)
$ r( S! _" U1 OReject = 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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