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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:
2 I  p. ]! o2 j1 Z3 P+ k约束条件是在上面的Table里面直接输入最大最小值吧。9 H, L( o+ x2 R3 H+ z9 n8 O5 U/ C
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).
# a, ~: V% Z* }
: N9 E; N, H/ }# O1 @; [8 n4 F; rMaximum 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).6 \$ Y# E# T8 O: ?* Q
下面的Equation栏里面应该写入目标函数吧。
' j) c8 G; C# n& i2 K8 y6 rMaxProfit (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   A/ B2 h+ A8 p# b3 Z
不等式都是在条件里面如" E1 h& I# |1 K! p1 z4 r
if (DelTankSize >= 6000 && DeliveryTimes < 60)
! S8 `' n8 W5 |  z7 e9 E; c" x* VReject = 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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