lingo求问
lingo如何限制条件使@SUM等于0或者2：我是这么写的：@for(sender(i):（@sum(receiver(j):x(i,j))-2 )* @sum(receiver(j):x(i,j)))；
但编译错误了..求大侠指导
你这个是一个互补约束，要乘起来大于等于零吧，你没有右端的项 madio 发表于 2014-8-22 10:15 static/image/common/back.gif
你这个是一个互补约束，要乘起来大于等于零吧，你没有右端的项
再请教一下：
sets:
!sender：始发点;
sender/1..6/;
!receiver：接受地点;
receiver/1..6/;
!time:消耗时间;
link(sender,receiver):time,x;
endsets
!目标函数;
min=@sum(link:time*x)/27;
!约束条件;
@for(link:@bin(x));
@for(receiver(j):@sum(sender(i):x(i,j))=1);
@for(sender(i):@sum(receiver(j):x(i,j))=2#or#@sum(receiver(j):x(i,j))=0);
data:
time=
5 64 36 77 35 32
40 8 18 99 56 32
60 144 4.5 66 21 8
80 112 12 5.5 56 24
90 128 30 22 7 4
80 144 12 66 7 4;
!probability:5/27 8/27 3/27 5.5/27 3.5/27 2/27;
enddata
应该怎么改呢？运行错误显示是说等式关系太多。
sets:
!sender：始发点;
sender/1..6/;
!receiver：接受地点;
receiver/1..6/;
!time:消耗时间;
link(sender,receiver):time,x;
endsets
!目标函数;
min=@sum(link:time*x)/27;
!约束条件;
@for(link:@bin(x));
@for(receiver(j):@sum(sender(i):x(i,j))=1);
@for(sender(i):(@sum(receiver(j):x(i,j))-2)*@sum(receiver(j):x(i,j))=0);
data:
time=
5 64 36 77 35 32
40 8 18 99 56 32
60 144 4.5 66 21 8
80 112 12 5.5 56 24
90 128 30 22 7 4
80 144 12 66 7 4;
!probability:5/27 8/27 3/27 5.5/27 3.5/27 2/27;
enddata
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