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！！！ 1 G# c& K! J* b6 c2 O( I我把程序贴在这， # f; P, N# r4 q& E( D$Title A Investment Problem 3 G$ h/ u1 a4 p, O4 i; Q$ontext8 f- y8 R+ o( r s+ W- F$ Z8 W
this problem finds a optimized investment that meets, v5 [ _* A0 ~- Y2 W" S
requirements in the city 2 }4 H' H4 q9 Q, i0 U: w6 U$offtext , c5 i ?7 R x( ?Sets : n: e. p) N( K& X& ^ i power plants /plant-1, plant-2, plant-3, plant-4/ - a6 s% l. ~5 |4 C j operating mode /mode-1, mode-2, mode-3/; ! S* Z8 v- O, H# U' O$ U+ }4 B) Q, aParameters+ K2 S% s1 B/ q; t: ^
c(i) the unit installed capacity of power plant i in cases3 p0 v7 ~* E6 z! o
/plant-1 10 4 c+ G, i+ m6 _* c& [" F plant-2 7 6 z3 d. P* J, U plant-3 16- a; _ | u" v) V
plant-4 6/1 L* e2 Z; r! j8 x
d(j) the electricity demand for power plant i in cases # m1 }& J$ G( ]3 T+ i+ E+ ` /mode-1 3% q, f' k1 W# g+ x' ~7 q2 I
mode-2 3 2 Y1 W1 w2 ^: R/ L mode-3 2/; . {5 \+ h5 b- P9 cTable f(i,j) the unit operating cost of each power plant & n- t4 O' g: X$ }, I mode-1 mode-2 mode-3 # [8 S5 g. a1 Y9 V8 t6 x& \. B5 l' c plant-1 0.4 0.24 0.04 7 Q' d* m! `# n plant-2 0.45 0.27 0.045 , `. l# h& `( y7 y( T. S plant-3 0.32 0.192 0.032& r- d7 R5 }/ M
plant-4 0.55 0.33 0.055;- ^, o4 z; p( X! w
Scalar m the minimum total installed capacity of the four power plant /12/3 _. S V/ p- r" D) O# K3 ^
b the minimum tatal investment budget of the four power plant /120/;- [1 r5 B- z, A& x, {9 G
Variables5 l) p g1 z7 v" g
x(i) the installed capacity of the i power plant in cases" j1 E: o# f5 L' d5 ^
y(i,j) the operating lever of the i power plant under the j operating mode ; C+ I. }" X* u3 B+ J4 ]5 h z the total cost of the four power plant; 8 G3 a+ _+ r' k1 ^Positive Variable x; $ [8 [% x- f2 i, Z- ]' m* ]Equations' ~0 E8 X. n5 ?+ W! [
cost define objective function 0 [. Y" j8 A: L" e! x0 a5 L( M6 O capacity1(i) observe total capacity linmit at plant i - h6 R! s4 ~; G- @% o budget(i) observe total investment budget limit at plant i6 p; E0 }+ {1 o8 n
capacity2(i) observe installed capacity for each power plant" S/ O: W% x- S+ F
demand(i) satisfy the electricity demand under each operating mode; j s2 f5 }, Z* p0 D' X6 {3 fcost.. z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j)); . X2 i7 @' D, |" t: Y8 Y! Ycapacity1(i).. sum(i,x(i)) =g= m;/ H7 k9 Q0 ?( `8 D6 G
budget(i).. sum(i,c(i)*x(i)) =l= b;$ K5 W* y/ U& j: V
capacity2(j).. sum(j,y(i,j)) =l= x(i);3 E, ], I8 b* T: L& d
demand(i).. sum(i,y(i,j)) =g= d(j);- A1 B# B; ?" V
Model investment /all/;3 u& I" g) a& i
Solve investment using lp minimizing z;; h* [6 M5 d. U& x' O( V$ [ P( \
Display y.l, y.m;1 }0 s5 y) e A9 K
0 h5 x* O T3 P U
运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！