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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:- E, W; \7 a2 U, J6 G
约束条件是在上面的Table里面直接输入最大最小值吧。
  J7 [* n) R7 N; Z# j6 L* h' OMinimum 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).
, v% T' v0 y8 {- a1 w- I
/ S& L( }+ O' K  a* O; E( mMaximum 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).
: d. P( k: p" @3 s! A- }0 |2 z下面的Equation栏里面应该写入目标函数吧。
( v1 L, T1 Q/ _: pMaxProfit (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 5 C. O; j- F' o& B
不等式都是在条件里面如
' C/ J2 a; d8 J: {& _+ H8 S6 f+ lif (DelTankSize >= 6000 && DeliveryTimes < 60)
- X2 p2 V6 h# R8 z5 f8 bReject = 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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