lingo建模语言与实例4

longde

目标与约束段
* I0 R2 J1 f5 R) q8 z% m$ ]集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
" Z2 a( ^" F* ~& \8 s6 ~* l  i- M    supply/1..2/:x,y,e;
    link(demand,supply):c;
endsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
3 }) U" h- s# a& X" r- ?b=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
$ m! F' \  T1 F: g3 o" nenddata
( I& g6 T+ {, Einit:
0 u. t4 P6 Z# R8 `x,y=5,1,2,7;
endinit
- w/ }; g6 {! m( A4 g9 k, mmin=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
0 w8 B/ h: @  f- `3 P@for(demand(i)sum(supply(j):c(i,j))=d(i););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END