Search found 15 matches

by Bingo LI
1 week ago
Forum: Modeling
Topic: assign parameters in sequence
Replies: 4
Views: 82

Re: assign parameters in sequence

Hi Renger,
It solves my problem perfectly.
Thank you.
Li
by Bingo LI
1 week ago
Forum: Modeling
Topic: assign parameters in sequence
Replies: 4
Views: 82

Re: assign parameters in sequence

Thanks for your answer.
However, a vector (P_1(ii)) is needed as there are other variables in my programm.
The purpose of this programm is that I want to eliminate P_1(1) when ii=2.
Could it be done?
by Bingo LI
1 week ago
Forum: Modeling
Topic: assign parameters in sequence
Replies: 4
Views: 82

assign parameters in sequence

Hello all, I'm working on assigning a parameter in sequence. In my purpose, the sequence of the parameters is: i=1 P_1= 13 i=2 P_1= 24 i=3 P_1= 15. However. the result in my programm is i=1 P_1= 13 i=2 P_1=1 13 2 24 i=3 P_1=1 13 2 24 3 15. The code is attached. Could someone help me with this proble...
by Bingo LI
2 months ago
Forum: Archive Google Group
Topic: unable to understand nature of obtained results
Replies: 2
Views: 393

Re: unable to understand nature of obtained results

Hi Archiver,
I'm facing a similar problem, did you find a solution to this issue ?

Regards
Li
by Bingo LI
2 months ago
Forum: Modeling
Topic: Need help to programm j≠i
Replies: 2
Views: 184

Re: Need help to programm j≠i

Hi Fred,
Thank you for your prompt reply. It solves my problem perfectly.
Just as you said, I misinterpret the GAMS syntax 'j ≠i ' as 'j<>i '.
Again, thank you!

Best,
Li
by Bingo LI
2 months ago
Forum: Modeling
Topic: Need help to programm j≠i
Replies: 2
Views: 184

Need help to programm j≠i

Hello all, I want to programm a formulation: sum(t, sum(j∈N & j≠i, P(i,j,t))). The code is as follows: set i / 1,2,3 / t / 1*24 /; alias(i,j); sum((t,j)$(t,j<>i), p(i,j,t)) However, the programm repor some errors: 148 Dimension different - The symbol is referenced with more/less indices as declared ...
by Bingo LI
2 months ago
Forum: Solvers
Topic: Can someone help me with GAMS Error 148
Replies: 4
Views: 396

Re: Can someone help me with GAMS Error 148

It works
Thank you very much!!

Best,
Li
by Bingo LI
3 months ago
Forum: Solvers
Topic: Can someone help me with GAMS Error 148
Replies: 4
Views: 396

Re: Can someone help me with GAMS Error 148

Hi Renger, Thanks for your answer. In my purpose, I exactly want to minimize each ETA (ETA(1), ETA(2), ETA(3)) because I want to utilize some distributed algorithm. And p_pvf(i,t) is a variable in my future formulation. Could you give me some advice to write it under the rule "write one objective fu...
by Bingo LI
3 months ago
Forum: Solvers
Topic: Can someone help me with GAMS Error 148
Replies: 4
Views: 396

Can someone help me with GAMS Error 148

Hello all,
I have difficulties in solving my problem. Can someone help me with GAMS Error 148

Error Messages
148 Dimension different - The symbol is referenced with more/less
indices as declared
257 Solve statement not checked because of previous errors

Thank you,
Li
by Bingo LI
3 months ago
Forum: Solvers
Topic: the solver found integer solution
Replies: 11
Views: 596

Re: the solver found integer solution

Hi Fred,
Thanks for your reply.
I have no idea to deal with my programm now. I just want to solve it with the status "1 optimal" through adding some constrains. In this case, could you tell me how to modify it?

LI