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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:
# k, {2 u  h+ j% f约束条件是在上面的Table里面直接输入最大最小值吧。. R/ Q, j6 _8 ]
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).
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9 q1 R; j% U4 M9 D% K3 G9 ~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).# @. d) ^& A! r" S2 o4 B. W
下面的Equation栏里面应该写入目标函数吧。7 G2 Q- W0 J3 t* d( e7 h! k
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
* K6 J. O) J2 f不等式都是在条件里面如
" V1 L7 D' w% i( w! Q: |# G8 \if (DelTankSize >= 6000 && DeliveryTimes < 60)1 v: [5 `: D1 A; `* R
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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