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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:/ @0 }: S& F' y* G
约束条件是在上面的Table里面直接输入最大最小值吧。/ S  I4 \6 n7 F
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).
' ^0 g5 g7 N1 J9 L7 k& X下面的Equation栏里面应该写入目标函数吧。& U- n' t* f& A( J, n- [+ V
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 - g6 K0 D( x2 I$ O  t
不等式都是在条件里面如
) E0 [: R# V3 Aif (DelTankSize >= 6000 && DeliveryTimes < 60)% d( Z* s3 ~3 [( t+ |
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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