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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:
4 d3 |3 I! D5 s. p约束条件是在上面的Table里面直接输入最大最小值吧。
6 Y4 w* M8 X/ t0 o1 z; {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).
4 {: C) |6 w4 C4 N' ~3 z' ?0 J3 G2 I6 }! I# N# f) R* S
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).
; q' ^3 c3 R/ ~下面的Equation栏里面应该写入目标函数吧。3 j/ `; p2 i, _% I8 c! L
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
0 L' F  }2 T& j: N7 p5 ~不等式都是在条件里面如4 i+ X2 {2 N0 a! `) |
if (DelTankSize >= 6000 && DeliveryTimes < 60): _$ s8 M, E  C: U
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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