lingo建模语言与实例4

longde

目标与约束段
集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
  M* X2 p% V3 Z初始段（INIT  ENDINIT）
  i; Y% H. ~8 I( F（计算段 (CALC ENDCALC)）
MODEL:
Title Location Problem;
sets:
8 g1 n5 t* S2 ^* n+ T    demand/1..6/:a,b,d;
, E, B& N3 F! ^    supply/1..2/:x,y,e;
8 @( V* b& Y) P- ~& Z+ `    link(demand,supply):c;
1 ]- L+ R( R  u/ b6 W* s+ V4 D5 Aendsets
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;
* n9 |0 g* U* _! ^* Z6 ^, ?1 \d=3,5,4,7,6,11; e=20,20;
2 m- m6 ?9 V( u3 [* Z2 Oenddata
( \% U- q$ c8 G6 [; L0 oinit:
0 {, v. d  |! C; G2 vx,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));
! E6 x( g, _$ u# X4 c+ }- h2 H1 j@for(demand(i)sum(supply(j):c(i,j))=d(i););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
8 n+ X% B6 S/ A: n/ O1 ~$ jEND
) V3 V, ]0 e! @* D& Q* w: B! c
1 w  }' I" b* t2 p% w8 A