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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:
# ?" y7 J% b. @. ^* I5 I约束条件是在上面的Table里面直接输入最大最小值吧。3 P! Q3 t8 r/ k) N6 a9 a- W
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).
' F: ]& W. w+ c2 E3 c
9 M- @+ I# Z/ n/ m/ c  {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).% ?( t4 I1 H; f: Q7 Z6 U
下面的Equation栏里面应该写入目标函数吧。( m9 r  g; A" 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
! @$ P* Z+ l0 F  ^不等式都是在条件里面如
, Q! i* j% x; M3 A0 mif (DelTankSize >= 6000 && DeliveryTimes < 60)
" Q0 {1 d2 U# p1 L) U  yReject = 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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