lingo建模语言与实例4

longde

目标与约束段
集合段（SETS    ENDSETS）
  f5 {" [4 n# {  b数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
' |; u( ~- O( |8 S( L/ H6 t' PMODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
/ q  @7 y5 q, b2 P    link(demand,supply):c;
1 T" D1 O# ]6 E2 G5 q1 g$ i/ [4 Cendsets
2 C' G) y8 f8 R, N2 K( tdata:
& U: r$ F. B9 i; F7 |% {1 r6 u( z  La=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
/ P1 t! O! H2 ud=3,5,4,7,6,11; e=20,20;
& Q; o3 t9 u2 e4 p1 x+ d2 fenddata
( d; r  L' V% Binit:
0 k6 s/ ?* P% bx,y=5,1,2,7;
endinit
min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
@for(demand(i)sum(supply(j):c(i,j))=d(i););
1 @- D# k+ h. g# J4 D$ X% j@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END
' P2 F/ U# C! d: W6 X2 V
2 k6 _& O, Z8 m, @1 S