Suyue Xu
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Suyue Xuさんの最近のアクティビティ-
Suyue Xuさんがコメントを作成しました:
Hi Riley Thank you for your suggestion!I tried to run the NoRel heuristic for 1200s,and it turns out shifting to phase 2 quickly.Here is the log: Set parameter UsernameSet parameter CrossoverBasis ...
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Suyue Xuさんがコメントを作成しました:
as the big-M method is introduced to solve the C&CG subpoblem,I'm wondering if the value of constant M could make any difference.So I changed the constant value from 10^6 to 10^4,here is the log : ...
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Suyue Xuさんが投稿を作成しました:
BestBd of MILP hardly moves
回答済みHello everyone I'm dealing with a MILP model functioning as the subproblem of column and constraint generation algorithms(C&CG).However gurobi struggles to push the BestBd of the model.I've tried t...
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Suyue Xuさんが投稿を作成しました:
wrong solution due to numeric issues
ユーザーの入力を待っています。Hi gurobi support team I find a wrong solution due to numeric issues with the warning:'Warning: 1 variables dropped from basis'.Here is the log: Set parameter UsernameSet parameter TimeLimit to val...
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Suyue Xuさんがコメントを作成しました:
Thank you for your advice!
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Suyue Xuさんがコメントを作成しました:
Hi Riley I've tried to experiment with MIPFocus and Cuts to set them to 3,and try different branch direction,but all these measures make no difference.What do you mean by "improving the lower bound...
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Suyue Xuさんが投稿を作成しました:
gurobi struggles to narrow the gap of MIP
回答済みHi gurobi support team I'm now solving a MIP problem with quardratic objectives and linear constraints(along with PWL constraints).The result shows that gurobi quickly narrwo the gap to less than ...
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Suyue Xuさんがコメントを作成しました:
Hi Jaromil Unfortunately the MILP model can find a solution in less than 10 min,but i'm still not satisfied with the efficiency.After I revised problems you mentioned above, it seems that the heuri...
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Suyue Xuさんがコメントを作成しました:
Thank you, Jaromil I will try to clean up very small coefficients and pay attention to the numeric issues.Thank you for your kindly comment again!
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Suyue Xuさんがコメントを作成しました:
Thank you for your comment! It seems that the model has numerical issues, as the binary variables could oscilate during the branch-and-bound.Here is the possible problem syntax(written in MATLAB wi...