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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:
' I9 I# S" Q+ T" _! h1 T约束条件是在上面的Table里面直接输入最大最小值吧。. O1 j0 B8 f) ?# V6 J4 T
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).& p/ ?, M- q, a6 ~  k
下面的Equation栏里面应该写入目标函数吧。0 ?2 m' O; W4 _0 i0 z+ t" x
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
7 R) q" y+ ~8 _不等式都是在条件里面如
/ V$ n; b  z) U6 k9 L/ rif (DelTankSize >= 6000 && DeliveryTimes < 60)0 ~5 w( W* c6 h
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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