标题: 关于GAMS的问题，小弟询问咯？？请大侠释义………… [打印本页] 作者: 随墨枫飞 时间: 2013-5-30 13:16 标题: 关于GAMS的问题，小弟询问咯？？请大侠释义………… 非常感谢亲！！请各位一定帮帮忙！！学期作业啊！！！' b" e: c; b9 x7 B
我把程序贴在这，# t$ n) k. l- C3 I: v3 \
$Title A Investment Problem1 V' ?% ^& W6 c m5 S* ]
$ontext0 H" l6 e( a. m
this problem finds a optimized investment that meets% w( b2 z/ R5 o3 {1 W- ?
requirements in the city+ g1 w2 U' s+ W
$offtext4 t g8 i- Z9 w
Sets, m* v" ]( t, Z& n
i power plants /plant-1, plant-2, plant-3, plant-4/ 7 ~0 O: N6 g9 o; K; c, n j operating mode /mode-1, mode-2, mode-3/;4 z* A; i' U3 @; F: v
Parameters , I' C/ P! W# | c(i) the unit installed capacity of power plant i in cases ) h2 w" f8 m6 m /plant-1 10( t; u I q3 n5 G6 p$ m6 a* L
plant-2 7 - L1 V2 G* }, R7 ? plant-3 16 L- t. U# i$ E
plant-4 6// D7 F J) Q9 {% l5 g! c6 C
d(j) the electricity demand for power plant i in cases+ d+ |4 D5 z N8 e
/mode-1 3 # }# K+ r8 Z3 g2 U- M) U mode-2 3 " `; @: [# T' S2 B mode-3 2/;2 U' L$ {! v/ J3 V8 p
Table f(i,j) the unit operating cost of each power plant . K- ~+ H( l: ^! s& X4 J: S mode-1 mode-2 mode-3& L1 X* ]/ K% n, U( e P
plant-1 0.4 0.24 0.04& ~* G( p' N+ C& L. p6 x! r0 Z
plant-2 0.45 0.27 0.0458 _3 v: @$ ~! I+ j$ G. O
plant-3 0.32 0.192 0.032% ]# A: r1 B, {4 c3 P5 g3 p6 x
plant-4 0.55 0.33 0.055;/ r: P( Z3 w2 o& Z
Scalar m the minimum total installed capacity of the four power plant /12/+ `" R: V" P" y* j7 d, d; E% d
b the minimum tatal investment budget of the four power plant /120/; # S! k u# u% x/ F+ P* }Variables/ c+ m0 |: `7 ?' u; B9 O
x(i) the installed capacity of the i power plant in cases 0 E4 M/ [$ a M! z y(i,j) the operating lever of the i power plant under the j operating mode1 j7 h+ F5 v& t: X
z the total cost of the four power plant;& [$ S4 E; r/ {6 j9 U |% F
Positive Variable x;$ f! k/ d2 M1 z. f
Equations- w" v5 \/ B3 S' h
cost define objective function " g6 X2 _$ I9 u4 f; Q5 _# E% n capacity1(i) observe total capacity linmit at plant i 9 L" F! V; Y5 w4 N budget(i) observe total investment budget limit at plant i8 s! n) B3 m; z
capacity2(i) observe installed capacity for each power plant9 K1 r( p# O0 F( U% z! Z- M# i
demand(i) satisfy the electricity demand under each operating mode; * n% Y! `) O! A0 O, ucost.. z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j)); I5 Q2 m; Z) ^
capacity1(i).. sum(i,x(i)) =g= m; - b* y4 B6 Z7 I$ r& A% Rbudget(i).. sum(i,c(i)*x(i)) =l= b; |; l3 v% f/ k& { p: I y% T8 H. ^
capacity2(j).. sum(j,y(i,j)) =l= x(i);, K- I/ h! \" e! e: F2 f1 v, X6 r+ h6 f6 }
demand(i).. sum(i,y(i,j)) =g= d(j);1 r& T5 M" ?# z2 f. L; R/ |2 w
Model investment /all/; ( V: i" U/ w! uSolve investment using lp minimizing z; - O3 E3 l/ s4 k d' ODisplay y.l, y.m; & D1 N9 V0 P) U * b" \2 W/ L% f9 `5 O* r运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！