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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！！！' w1 e$ U! t3 c- u* V! I0 [# q' u
我把程序贴在这，
/ K; b1 A! c  K5 p9 k7 m; J$Title A Investment Problem
* q4 P( P9 g& q5 ~$ Q# ]1 W$ q7 t! W$ontext# a. \% q+ Z! X( Y
this problem finds a optimized investment that meets" ^8 ?8 B- {* e7 p7 J5 X5 X
requirements in the city& s  }1 y' v2 I& E7 ^' C5 K
$offtext
( J, r3 Z/ ?; s6 {; ]" nSets( W& T. _9 w- |: F! j
    i  power plants  /plant-1, plant-2, plant-3, plant-4/2 H7 [" \1 t$ y5 B/ n8 \
    j  operating mode  /mode-1, mode-2, mode-3/;
7 M' c6 t: w4 R; r: QParameters* Y' N) P0 u# W4 f7 S" ]% v
    c(i)  the unit installed capacity of power plant i in cases4 F) @- U; a! F- y6 J- F8 T4 q5 g8 x
       /plant-1  107 L" J1 W; z3 P7 P
        plant-2  7
- B6 p1 _7 G- ^        plant-3  167 Y6 x  p; Y4 d6 Y: D$ b) D4 B
        plant-4  6/2 I2 @3 \7 B! N( h& k
    d(j)  the electricity demand for power plant i in cases
; Q: W) G1 T, S       /mode-1  3
# Y% h4 X7 O7 D) @        mode-2  3' S. I- ]8 r1 g
        mode-3  2/;: V4 k1 x* k0 Y5 Y2 I$ j
Table f(i,j) the unit operating cost of each power plant# C. i5 m7 N* i* H
                 mode-1   mode-2   mode-3
4 C$ C' s, k; k* d" w- D5 P        plant-1   0.4      0.24     0.04" I& U% H- [0 y# n! A
        plant-2   0.45     0.27     0.045' Z# @+ w/ c, X0 s
        plant-3   0.32     0.192    0.032- Y8 S: f; ?; ]6 g7 Q6 ^
        plant-4   0.55     0.33     0.055;
" w9 H6 o# f5 P$ D6 j& m6 _Scalar m the minimum total installed capacity of the four power plant /12/
0 ?6 C% i: ]. s" r# y$ ~- \, \       b the minimum tatal investment budget of the four power plant /120/;1 C* X6 d, X# X( P' \
Variables  |( M" E1 \4 r& ?! L8 ~! E
       x(i) the installed capacity of the i power plant in cases
% P) A  r8 j6 m- V3 @& B       y(i,j) the operating lever of the i power plant under the j operating mode
0 m. P7 }8 e2 q0 K! x% }9 i  u' O       z the total cost of the four power plant;
- s# T0 P4 U/ k; KPositive Variable x;
' N3 i& e' n0 OEquations( K- L) N( I1 r" j( b0 u# w: y) Q2 m
       cost           define objective function$ \- t2 {, A0 m/ ~
       capacity1(i)   observe total capacity linmit at plant i/ O2 _3 A( o- {) }
       budget(i)      observe total investment budget limit at plant i& k9 d: o; q. d
       capacity2(i)   observe installed capacity for each power plant% n! p  r3 ?4 }  f) s4 t
       demand(i)      satisfy the electricity demand under each operating mode;
( b0 w; t1 e5 t' {3 ~& B6 i7 e! `cost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
. u6 I  ?5 g  _8 ?2 e" ]capacity1(i)..    sum(i,x(i)) =g= m;
' V% E- x7 e$ A# V" g# @5 H: ]0 cbudget(i)..       sum(i,c(i)*x(i)) =l= b;; d+ H1 b6 u) t, n0 V
capacity2(j)..    sum(j,y(i,j)) =l= x(i);  e/ P0 y1 q1 @( U' e
demand(i)..       sum(i,y(i,j)) =g= d(j);
1 Q0 O! ?7 i+ N4 D- Z  hModel investment /all/;
7 Y4 x$ J' O* o- ^+ G; V9 SSolve investment using lp minimizing z;
! L; U; ]3 }5 y2 e2 b5 A7 mDisplay y.l, y.m;! b% w  j, g% \4 R5 v
1 R) k! o- Y: \9 M3 B! B" j
运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！



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