lingo建模语言与实例4

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目标与约束段
集合段（SETS    ENDSETS）
  S' y) c7 [8 r数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
) A6 c2 g3 w4 u4 w3 P% D（计算段 (CALC ENDCALC)）
* t( Q3 |$ Q/ H2 c& ?4 c8 \MODEL:
Title Location Problem;
" M' F  U. J3 z- F. w' }, Fsets:
    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
: _; `! M% L, r9 l1 x) @& [$ k    link(demand,supply):c;
+ b( M; |6 r5 F" l* Z3 }endsets
6 F1 K$ J5 k( I5 R0 |, B8 L% G2 fdata:
a=1.25,8.75,0.5,5.75,3,7.25;
0 v& U" }! y# hb=1.25,0.75,4.75,5,6.5,7.75;
- X9 {+ S( H  ~$ g" I) q; Id=3,5,4,7,6,11; e=20,20;
enddata
! c, P, J! E7 j( s5 R& Iinit:
3 q+ a6 }/ r/ L  x$ S! U/ @& Yx,y=5,1,2,7;
9 X9 o- h! t" Q$ P6 _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););
9 U3 M, K& u2 hEND
! F8 {% f; [  k" m) U