lingo中model is ill defined问题答:model:sets:cross/1..92/:a,b;police/1..20/:x,y;link(police,cross):f,d;endsets data:v=60;enddata min=@max(link(i,j):f(i,j)*d(i,j)/v);for(link(i,j):d(i,j)=@sqrt((x(i)-a(j))^2+(y(i)-b(j))^2)*0.1);for(cross(j):@sum(police(i):f(i,j)...