lingo建模语言与实例4

longde

目标与约束段
! d6 O9 V: L( p0 W- ?集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
. H/ m: H; B* [# o初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
- T. B1 x5 _7 ?5 }- ^& f7 kMODEL:
/ B' u8 w+ n6 A2 j2 ^Title Location Problem;
" u3 y& S* p( N. E1 y6 o, fsets:
! R& T6 u* P4 {. e: Q    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
    link(demand,supply):c;
/ p3 e/ l! V& A$ U7 J- nendsets
data:
" T2 ^8 q/ }- n! @a=1.25,8.75,0.5,5.75,3,7.25;
5 b; _( J) b1 A( q6 @" b- Vb=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
" s6 c6 K8 |) o: w' W0 F$ ^enddata
, h& }6 ?: G2 t6 U8 Einit:
% L" i2 m& R. i  C; qx,y=5,1,2,7;
" y6 o" l, G, Z8 Y6 Zendinit
" G2 Z7 e0 b# x& ]* Cmin=@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););
3 m; G; l7 g* \2 V6 O' m+ aEND
. R0 q$ ~3 g1 f1 P4 F3 N8 P
9 [0 g  B" }: E% L# h0 S6 T