Lingo建模语言与实例4

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目标与约束段
" ]' ~$ K- ^' m; y1 e# `  }集合段（SETS    ENDSETS）
3 P# `& F# r+ b3 y& \: E数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
- V# M" o" o, `- d* n8 }: m+ M/ S2 u（计算段 (CALC ENDCALC)）
MODEL:
7 q" V( N+ a8 z2 |0 Z# D, E1 BTitle Location Problem;
sets:
9 p" J! g" {0 \    demand/1..6/:a,b,d;
9 e% Y( Y8 |6 F4 ~    supply/1..2/:x,y,e;
4 o9 {/ L9 J! V! k' d: {) q: e, P    link(demand,supply):c;
" w' x: D6 a0 J) \- H" x/ B' Lendsets
data:
4 S" y1 I1 n! x! w- y' P* r3 O& y0 X; la=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
enddata
$ u5 [6 w! |# |% U' `- jinit:
5 ~! b) Y* u+ u( c( }( Q7 sx,y=5,1,2,7;
" ?. K+ w. ]' F. l" F0 dendinit
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););
: g; Q/ U2 w' C* c3 b@for(supply(i)sum(demand(j):c(j,i))<=e(i););
' {; P  e4 i9 ]: K* XEND
3 g7 P( w; Y  k- J7 ^

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好