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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:; c3 X/ i" V4 L" `" K. {
约束条件是在上面的Table里面直接输入最大最小值吧。
% T4 [0 a4 S( D; OMinimum 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).! R' O! \% h/ @$ J: h& i" \' R
% E2 [( Y! Y6 f( n7 w, R4 t
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).  B( Y7 [. ~; r7 g
下面的Equation栏里面应该写入目标函数吧。% Y" A! [1 @* \1 i
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 ( C- b  I( W( o; q* K) B
不等式都是在条件里面如# s3 _2 G1 c& ]) N+ p$ D
if (DelTankSize >= 6000 && DeliveryTimes < 60). M3 F3 n4 t) v2 _+ N
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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