[程序分享] GAMS软件下载（免费）及其中、英文使用说明 [推广有奖]

211楼

美腻流年(真实交易用户) 发表于 2016-12-7 22:20:12

非常好用，十分感谢

212楼

ydc129(真实交易用户) 发表于 2016-12-12 01:08:09

谢谢分享

213楼

个鹅鹅鹅(未真实交易用户) 发表于 2016-12-17 12:36:37

bmwskylan 发表于 2010-5-11 10:58
呵呵，刚才正在编辑修改中所以你无法解压。你现在可以重新下载一下，或者需要哪个文件我电子邮件给你发过去 ...

您好，我正在写论文，可以把GAMS软件发一份给我吗，我的邮箱960733052@qq.com,谢谢

214楼

Rinana(未真实交易用户) 发表于 2017-5-3 21:59:25

Sets
i state /1,2/;
Parameters
u(i) price in state i in cases
/ 1 28
2 40/
d(i) demand at time i in cases
/ 1 80
2 90/;
Variables
p1(i) procurement quantities in cases
p2(i) procurement quantities in cases
p3(i) procurement quantities in cases
s1(i) 0or1
s2(i) 0or1
s3(i) 0or1
z total cost
q(i) procurement from maket;
Positive Variable p1(i);
Positive Variable p2(i);
Positive Variable p3(i);
Positive Variable q(i);
binary Variable s1(i);
binary Variable s2(i);
binary Variable s3(i);
s1.l(i)=1;
s2.l(i)=3;
s3.l(i)=3;
Equations
cost define objective function
demand(i) satisfy demand at time i
constraint1(i) satisfy 0 or 1
constraint2(i) satisfy 0 or 1
constraint3(i) satisfy 0 or 1
constraint4(i) satisfy 0 or 1
constraint5(i) satisfy 0 or 1
constraint6(i) satisfy 0 or 1;
cost .. z=e=sum(i,32*s1(i)*p1(i)+37*s2(i)*p2(i)+45*s3(i)*p3(i)+u(i)*q(i));
demand(i).. s1(i)*p1(i)+s2(i)*p2(i)+s3(i)*p3(i)+q(i)=e=d(i);
constraint1(i).. 15*s1(i)=l=p1(i);
constraint2(i).. 35*s1(i)=g=p1(i);
constraint3(i).. 10*s2(i)=l=p2(i);
constraint4(i).. 25*s2(i)=g=p2(i);
constraint5(i).. 15*s3(i)=l=p3(i);
constraint6(i).. 30*s3(i)=g=p3(i);
option minlp=**b;
Model tr /all/;
Solve tr using minlp minimizing z;
Display s1.l,s2.l,s3.l,p1.l,p2.l,p3.l,q.l;
如上求解最优解，发现0-1变量中只有s2(i)能求出最优解，其余0-1变量都是0，求大神这是为什么？

2.jpg (2.86 MB)