lingo物流选址问题

model:

sets:

A/1..8/:d;

B/1..4/:n,k;!n为货源量，k为1-0函数;

links(A,B):cost,num;

endsets

data:

cost=

12 4 20 6

10 2 25 10

4 3 16 14

5 6 9 2

12 18 7 3

4 14 4 9

30 20 2 11

12 24 6 22 ;

d=100 50 120 80 200 70 60 100;

enddata

min=@sum(links:cost*num);

@for(A(i):d(i)=@sum(links(i,j):num(i,j)));

@for(B(j):k(j)*n(j)>=@sum(links(i,j):num(i,j)));

@sum(B(j):k(j))=2;

@for(B(j):@bin(k(j)));

end