lingo建模语言与实例4

longde

目标与约束段
& c& x: |' e) z8 e+ ?; _集合段（SETS    ENDSETS）
1 Z& g/ a0 V) b数据段（DATA   ENDDATA）
) Q/ D7 L* f- `/ k! @) F4 y+ C初始段（INIT  ENDINIT）
5 q. i3 U0 X) m% b1 U& m- F& x) h0 ]（计算段 (CALC ENDCALC)）
. m: m+ u+ m6 c9 x$ JMODEL:
Title Location Problem;
sets:
# i, R" D$ e$ o* C3 f    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
/ j6 q( J& j- s% b# y- k8 W    link(demand,supply):c;
' @) T: p# _' H3 }% W2 rendsets
data:
. ^+ |/ E/ ~9 L# ^, Ya=1.25,8.75,0.5,5.75,3,7.25;
3 {. A  \4 P1 a- a/ O& fb=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
9 O! W& K7 p' m1 Menddata
init:
: d8 g' l) V3 D; ^; ix,y=5,1,2,7;
! n" z2 M% q5 T# V- iendinit
* t, m3 E* N) y4 A2 Kmin=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
; Q% o8 O, Y9 ^* ?@for(demand(i)sum(supply(j):c(i,j))=d(i););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
& p' s. @9 |9 H7 q! @8 ?; bEND