lingo建模语言与实例4

longde

目标与约束段
# N7 b/ [1 l! w' p) M% X集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
, `9 x4 s, s# }* @, p, u3 Z4 S（计算段 (CALC ENDCALC)）
. u$ j+ M% M6 r9 PMODEL:
Title Location Problem;
. X$ S8 j3 ~6 n4 _4 a$ |sets:
    demand/1..6/:a,b,d;
( p; C# r6 v7 y4 T( K    supply/1..2/:x,y,e;
    link(demand,supply):c;
endsets
, c$ ~; A" n% r6 r' ndata:
7 o9 j' |7 z% K! ca=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;
' T1 L% G' Y) W4 r+ m# o' \. l1 T0 menddata
init:
x,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););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
8 }' g) _5 Q, s$ ]. c- SEND
) F& T4 k1 k& n- S7 ^( m! t