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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:
9 D5 O/ E+ S  E6 R! k5 H约束条件是在上面的Table里面直接输入最大最小值吧。
2 \) A; a( i9 R! R; 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).* s$ t, W6 L( v0 I( S: ]2 I6 y

/ y( g6 W+ a2 x7 UMaximum 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).5 f: `+ T5 L$ z  a: g
下面的Equation栏里面应该写入目标函数吧。
0 D6 C' h" _' L" B% i( kMaxProfit (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
* B0 d0 ]( e1 y1 F5 ?. \5 Z不等式都是在条件里面如9 L5 c# `0 e! {) B
if (DelTankSize >= 6000 && DeliveryTimes < 60)" ~2 c8 v  A% z: X
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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