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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:) y2 D& L! E6 d% S0 z
约束条件是在上面的Table里面直接输入最大最小值吧。/ T) t* Y; T( Z9 \& r% f6 j; h- G% F
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).. O" S/ p# r2 N0 l# s3 F4 q( }) Q
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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)., T7 n, h% |/ J5 t
下面的Equation栏里面应该写入目标函数吧。+ _/ i; U/ @/ i$ o
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
( u: J4 D# r7 d: Y; o不等式都是在条件里面如
9 h$ B$ B) r8 S' uif (DelTankSize >= 6000 && DeliveryTimes < 60)# i  t! z4 }6 J
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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