Lingo建模语言与实例4

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目标与约束段
0 w: S# e- X  w# u, {集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
9 M5 w+ ^  [) V% A. r8 t5 W( I  _初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
7 [4 I& o9 T3 |- t3 e% w5 BTitle Location Problem;
sets:
; N) ~2 d9 ~4 D( c' J1 P: m    demand/1..6/:a,b,d;
# W0 s! U& d% ]$ Y  |' @    supply/1..2/:x,y,e;
    link(demand,supply):c;
9 D9 d  k6 K5 K; wendsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
+ g  E' Q& U9 J. v  Zb=1.25,0.75,4.75,5,6.5,7.75;
0 Z8 H9 b, i7 E( c, sd=3,5,4,7,6,11; e=20,20;
" {/ j4 Y( y! aenddata
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));
3 {$ U0 D, R- N) U3 ?3 R6 S@for(demand(i)sum(supply(j):c(i,j))=d(i););
, {. }* @6 S" c- c/ N' e0 T5 _; P@for(supply(i)sum(demand(j):c(j,i))<=e(i););
1 u4 e( x5 \! n# S# fEND
$ P# i9 R8 V" S# S8 I

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