求Lingo高手帮忙混合整数规划,设施规划问题求解!

model:sets:supply/1。。4/;demand/1。。4/:d;production/1。。3/:a;link1(supply,demand):cost1,x;link2(production,supply):cost2,y;endsetsdata:a=0 10 20;d=11 18 12 10;cost1=11 12 13 1415 16 17 1819 20 21 2223 24 25 26;cost2=0 0 0 0600 550 560 610 1000 920 930 1020;enddatamin=@sum(link1:cost1*x)+@sum(link2:cost2*y);@for(demand(j):@sum(supply(i):x(i,j))=d(j));@for(supply(i):@sum(production(k):y(k,i)*a(k))>=@sum(demand(j):x(i,j)));@for(supply(i):@sum(production(k):y(k,i))=1);@for(link2:@bin(y));end