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！！！ 3 ~ y- l8 v5 b" r) V+ c% c, E我把程序贴在这， ( h. O2 h4 n, T- h1 V0 e$Title A Investment Problem0 E( B4 V3 }, f4 ]# J* m6 Z( N
$ontext! n- y# f! G% _) K
this problem finds a optimized investment that meets / T) c2 F( k l# grequirements in the city * [0 r# l C) T2 c+ e( F- \$offtext / M8 W# h% b6 d( dSets u" _- W% F$ x1 l& G i power plants /plant-1, plant-2, plant-3, plant-4/ / |/ R1 _6 u3 h j operating mode /mode-1, mode-2, mode-3/;4 f5 p! h; c& n2 K" d& o
Parameters' T+ J9 }/ I: g, Q
c(i) the unit installed capacity of power plant i in cases - ]$ \5 v4 x& k: i3 q/ r5 C% y /plant-1 10; ]6 |* {) T$ p! \8 j
plant-2 7 ; c) ?' o# i6 D1 t4 r plant-3 16$ L; @$ a L( |. E
plant-4 6/8 a- |, F# I/ Y1 o( e
d(j) the electricity demand for power plant i in cases * `7 V2 y" M/ c+ @ /mode-1 3 6 c& q6 x/ ?) s3 R$ _' a3 ^; _ mode-2 3 2 y) _& i. t' N8 f9 K, c; X mode-3 2/; # A X, r9 a5 v. X) E6 U( vTable f(i,j) the unit operating cost of each power plant $ Z& D* {" u6 B' G G! p' O mode-1 mode-2 mode-3 5 G' ?' }" ^8 s, D plant-1 0.4 0.24 0.04 l: @& I0 c4 S; I& s! _ s
plant-2 0.45 0.27 0.045 0 h% O& S6 a% E9 S& W plant-3 0.32 0.192 0.032, |5 |; A7 Z: V
plant-4 0.55 0.33 0.055;2 K3 }( l9 r# x' r3 x
Scalar m the minimum total installed capacity of the four power plant /12/6 d$ n( E* y9 {$ `
b the minimum tatal investment budget of the four power plant /120/; ' l. s( l+ O4 V. O1 ~; hVariables 5 ^9 ~3 h- U5 a7 n3 v6 O x(i) the installed capacity of the i power plant in cases 9 {& U6 N4 A: l y(i,j) the operating lever of the i power plant under the j operating mode% G q& i6 ` Q
z the total cost of the four power plant;4 o3 c- I1 b% j& Y7 x
Positive Variable x;( l4 h# i8 P/ v; R" \
Equations- u$ O* {, I- K
cost define objective function 3 p; \; v9 D4 R capacity1(i) observe total capacity linmit at plant i# s0 u; t P( `5 a$ ?+ Q$ F2 i
budget(i) observe total investment budget limit at plant i $ \5 i% A+ l/ T8 S) z capacity2(i) observe installed capacity for each power plant9 y5 P1 J2 W3 G+ T; e8 j
demand(i) satisfy the electricity demand under each operating mode;7 Q: F6 z- }7 @# [ l
cost.. z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));/ D, ?0 c; X3 F; q& Z7 L6 _' J
capacity1(i).. sum(i,x(i)) =g= m;' \; [0 ?% k3 P7 |+ v9 [
budget(i).. sum(i,c(i)*x(i)) =l= b; 0 [: f( p& D; F. a: xcapacity2(j).. sum(j,y(i,j)) =l= x(i); " f& u" k6 o. i u9 d, ademand(i).. sum(i,y(i,j)) =g= d(j); - A; t( z3 f# N' n1 A. r- hModel investment /all/;- W, g7 [ U6 K3 E& L
Solve investment using lp minimizing z; 4 L* `8 L) C1 l& F9 SDisplay y.l, y.m;2 z, X9 \+ ?& e3 @7 n2 N0 @
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运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！