设为首页收藏本站

最大的系统仿真与系统优化公益交流社区

 找回密码
 注册

QQ登录

只需一步,快速开始

查看: 3007|回复: 2

[交流] 关于优化工具中约束条件的表达

[复制链接]
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:
/ [$ G6 P5 U- b& v% p1 ]1 |约束条件是在上面的Table里面直接输入最大最小值吧。" t: u. e0 _; }2 z
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).7 D0 O; J. m( w; u$ U. Q+ T
6 B) ?5 b, k, ^, R$ S" h2 e  d- o
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).( K0 Y- H$ b3 D) E0 }8 @
下面的Equation栏里面应该写入目标函数吧。
. {4 w0 W4 p" @. a2 qMaxProfit (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 ; Z# @9 C3 B; q3 J3 }
不等式都是在条件里面如% P' U# V9 y: j
if (DelTankSize >= 6000 && DeliveryTimes < 60)1 k7 f" H! Q# u9 P
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。
您需要登录后才可以回帖 登录 | 注册

本版积分规则

QQ|Archiver|手机版|SimulWay 道于仿真   

GMT+8, 2024-11-22 09:20 , Processed in 0.014155 second(s), 14 queries .

Powered by Discuz! X3.4 Licensed

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表