lingo建模语言与实例4

longde

目标与约束段
/ q; C% L- }8 _" `' M' T集合段（SETS    ENDSETS）
0 a( P# h$ y9 x9 a& U/ |数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
6 ~4 w' g' L. ?1 H" K( J（计算段 (CALC ENDCALC)）
$ e% u! P: x; J8 G" m1 F) FMODEL:
Title Location Problem;
sets:
9 i( z5 P+ l$ C# ?: B% z4 A    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
    link(demand,supply):c;
2 T- |. L' m3 t  O0 F' p  wendsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
enddata
init:
' ?) f; c; A  j7 bx,y=5,1,2,7;
4 `! o) a8 [2 q; q4 \endinit
min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
0 K3 a6 T( Y0 l9 \, K& L7 P- u@for(demand(i)sum(supply(j):c(i,j))=d(i););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
4 s$ `: c" I+ sEND