lingo问题
model:
sets:
weizhi/a b/:cap,m,n;
ven/ v1 v2 v3 v4 v5 v6 /:dem,x,y;
links(weizhi,ven):yunshu;
endsets
min=@sum(links(i,j):yunshu(i,j)*@sqrt((x(j)-m(i))^2+(y(j)-n(i))^2);
@for(ven(j):@sum(weizhi(i):yunshu(i,j))>=dem(j));
@for(weizhi(i):@sum(ven(j):yunshu(i,j))