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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:  L' Y9 V# z$ }( j% e: c7 J
约束条件是在上面的Table里面直接输入最大最小值吧。2 ^6 t" c$ B! {
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).
. W: r9 I2 F6 M9 n, c! O, i* I# [+ x2 N0 l0 T$ r: k& u
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).
, {( w8 J' G, ?4 F6 \* O下面的Equation栏里面应该写入目标函数吧。
& d# w! {, |/ x0 G7 T3 h5 g' sMaxProfit (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
" l) G# p% g6 @不等式都是在条件里面如
& {- n: F1 z# S0 n: G4 h( ~$ t5 o- |# jif (DelTankSize >= 6000 && DeliveryTimes < 60)
' z* G; ?0 Q7 j9 D+ WReject = 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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