Assia Kamal-idrissi

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Recent activity by Assia Kamal-idrissi Recent activity Votes
  • Hi Elisabeth, Thank you for this explanation. By setting Threads to 0, it takes more than 8812s to get the optimal result. However, the optimal result can be retrieved in the following line with 19...

  • Hi Riley, Thank you for your reply. If understand from the response below that more Threads make Gurobi spends more time. The machine has 112 Threads. Would you please tell me how many threads I ha...

  • When I kept default value of the parameters Heuristics, Cuts, PreSparsify and NodefileStart. there is a heuristic solution to start:   Set parameter Presolve to value 0 Set parameter Threads to val...

  • Hi, Thank you for your reply. The model fingerprint is 0xf11e235e as showed in my first post. While 0xbf1c0f3c is the model with minimizing distance rather than time. Here is the ongoing solving wi...

  • Hi Riley, Thank you for these insightful explanations. Now, I understand why the nonzero variables increases. For the paper, I working on minimizing time rather than distance (Time = Distance * Spe...

  • Hi Riley, Thank you. I've just finished to upload the zip to Google Drive. Here is the link: https://drive.google.com/file/d/1sN2f3QfLpuFkjwrBT9knYejXJRosgxp2/view?usp=sharing Thank you. Assia

  • Hi Riley, Thank you. I really appreciated it. Here is the link: https://drive.google.com/file/d/1GJnfCC3Sef7PIyrapso3DjOcEhvq0wWl/view?usp=sharing For data: https://drive.google.com/file/d/1ggRah3n...

  • Hi, Thank you, it is related to my post. I changed other parameters such as MIPGaP and PreSparsify. Still the presolve spend time without enhancing the solution. The model is small regarding others...

  • Hi, I tried various parameters including disabling Presolve but the model takes more than 1000 s. What I can not understand in the log is that whay the number of nonzeros increase.   Thank you for ...

  • Hi, I tried this parameters but still got the same issue. I'm working with 1400 GB of memory and I reduce the number of threads with Presolve set to 2. I'm comparing with the paper below where they...