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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:
6 z) |4 M9 |$ g约束条件是在上面的Table里面直接输入最大最小值吧。
# Z( E7 o" n- T! {% UMinimum 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)., |! m5 Y/ \  r9 u
( A6 U' c% ~. n4 |! `6 j9 R
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).4 H* M$ P3 [5 e
下面的Equation栏里面应该写入目标函数吧。
: Z! F( [3 O' GMaxProfit (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 f( Z' C+ O  s5 D
不等式都是在条件里面如
1 d; B9 N# R0 H( _' F5 B4 eif (DelTankSize >= 6000 && DeliveryTimes < 60)8 z8 ^3 U7 L0 E. c# j' U: o4 ]5 M
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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