A.Omidi

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Latest activity by A.Omidi
  • A.Omidi commented,

    Dear Jaromil, Many thanks for your explanation. I have just updated it.    Regards Abbas

  • A.Omidi commented,

    Dear Eli, Many thanks for your detailed explanation. I can do that for modifying my model and it works fine. :) Would you say please, how you can use LaTex in your comments? I tried it but, it seem...

  • A.Omidi created a post,

    Linearizing factorial function

    Answered

    Dear community team, I'm trying to write a constraint in the following form: $$(a_j * (s_j!)) / L \leq 1-\gamma$$ Where \(\texttt{a}\) and \(\texttt{gamma}\) are constants and \(\texttt{s}\) and \(...

  • A.Omidi created a post,

    Using Gurobi heuristic parameter to achieve a feasible solution

    Answered

    Dear support team, I'm working on an optimization problem (MIP) which in the medium/large scale takes too much time to solve optimality. Then I tried to use Gurobi heuristic parameter to invoke a f...

  • A.Omidi created a post,

    MIP-Heuristic as a MIP-start

    Answered

    Dear support team,   I'm trying to solve a scheduling problem using Gurobi 9. The model is solved and the optimal solution is found. Now, I would like to use a heuristic (which an instance could be...

  • A.Omidi created a post,

    Gurobi NEOS issue

    Answered

    Dear support team,   I'm trying to solve a large scale optimization problem using Gurobi solver (V.9) on my local machine. As I have not accessed to an academic licence for Gurobi, I will need to u...

  • A.Omidi commented,

    Many thanks for your detailed explanations. Regards

  • A.Omidi created a post,

    Special knapsack problem

    Answered

    Dear community team, I have tried to solve a special knapsack problem which contains an inequality with binary parameters. AFAIK, cover cuts families can be applied to solve the standard knapsack ...

  • A.Omidi commented,

    Dear Eli, Thanks so much for your detailed explanation. I can do that.   Regards

  • A.Omidi commented,

    Hi,  With thanks for your useful comment, I try to use you mentioned parameters. I'm using Gurobi Java API. The parameters are set as follows: model.set(GRB.IntParam.PreCrush, 1);model.set(GRB.IntP...