Dear Muhammet,
Thank you so much for your detailed explanation.
I will check that and get back to you if I have any issues.
Best regards
Abbas
Search found 39 matches
- 5 months ago
- Forum: API
- Topic: GAMSPy issues
- Replies: 2
- Views: 6642
GAMSPy issues
Dear support team, First, thank you so much for developing and supporting such a nice tool that works as easily as GAMS Studio. I am trying to implement and run a tiny example, a simple transportation model, to see how this new feature works. Let's say, I have frequently used Google Colab. 1) When I...
- 1 year ago
- Forum: Modeling
- Topic: Converting an assignment into the schedule
- Replies: 0
- Views: 3000
Converting an assignment into the schedule
Dear support team, I am working on an assignment problem in which the output would be of assigning tasks to the resources w.r.t minimizing the number of resources. Suppose the following output: m1 m2 m3 m4 item1 1.000 item2 1.000 item3 1.000 item4 1.000 item5 1.000 item6 1.000 item7 1.000 item8 1.00...
- 2 years ago
- Forum: Modeling
- Topic: Is it possible to use a decision variable as an outer loop (combination)
- Replies: 2
- Views: 1621
Re: Is it possible to use a decision variable as an outer loop (combination)
Dear Dr. Bussieck,
Many thanks for your answer. The second paragraph you mentioned is exactly what we were looking for. Now, it is clear to us.
Best regards
Abbas
Many thanks for your answer. The second paragraph you mentioned is exactly what we were looking for. Now, it is clear to us.
Best regards
Abbas
- 2 years ago
- Forum: Modeling
- Topic: Is it possible to use a decision variable as an outer loop (combination)
- Replies: 2
- Views: 1621
Is it possible to use a decision variable as an outer loop (combination)
Hi, There are some situations in which one needs to use a decision variable as an index in a specific constraint. Applying such a case, somewhat, is straightforward by introducing the auxiliary binary variables and adding appropriate constraints. Now, someone needs to use a decision variable as an i...
- 2 years ago
- Forum: Modeling
- Topic: Lagrangian relaxation issue
- Replies: 1
- Views: 2482
Re: Lagrangian relaxation issue
Dear community team,
If you need more details about the question I can elaborate more on this. Actually, I do not expect an exact answer and any useful insight would be appreciated.
Best regards
Abbas
If you need more details about the question I can elaborate more on this. Actually, I do not expect an exact answer and any useful insight would be appreciated.
Best regards
Abbas
- 2 years ago
- Forum: Modeling
- Topic: Lagrangian relaxation issue
- Replies: 1
- Views: 2482
Lagrangian relaxation issue
LR_(GAP-2)_1.gms Dear community team, I am trying to solve a scheduling problem by using the Lagrangian relaxation method. As I am pretty new in this field have tried to start with a generalized assignment problem to understand how this method can work on the MILP's. Also, I have read https://my.ec...
- 2 years ago
- Forum: Modeling
- Topic: Issue about fix and dive heuristic
- Replies: 0
- Views: 4764
Issue about fix and dive heuristic
Hi, I am trying to solve a scheduling problem (MILP) by using GAMS/Cplex. As the problem is not being solved in a reasonable time for the large-scale instance, I would like to use a simple heuristic namely fix and dive to achieve a feasible solution. What I have tried to do is, solving the original ...
- 3 years ago
- Forum: Modeling
- Topic: Issue on executing an option file
- Replies: 0
- Views: 2037
Issue on executing an option file
Dear community team, I am trying to solve an NLP problem by using Baron solver via the Neos interface in the GAMS v.34. The option file contains two local parameters of the Baron solver and is as follows: option nlp= Baron; $onecho > baron.opt numloc 0 dolocal 0 $offecho model.optfile=1; When I have...
- 3 years ago
- Forum: Modeling
- Topic: Defining the planning horizon in the RCPSP
- Replies: 0
- Views: 2187
Defining the planning horizon in the RCPSP
Dear support team, I am trying to write an optimization model related to the resource-constrained project schedule based on Pritsker et al. formulation. The model is as follows: test.jpg When I have defined the objective function as shown in the model, the final solution is incorrect but, when I wri...