Alexia Payan
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Alexia Payanさんの最近のアクティビティ-
Alexia Payanさんが投稿を作成しました:
MIP gap
回答済みHello All, I have a multi-objective hierarchical optimization problem with about 450,000 variables (integer) and 355,000 constraints. After about 11 hours, the MIP gap for the first objective is 10...
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Alexia Payanさんがコメントを作成しました:
Hello Matthias, Thank you for your help. I am aware of the RelTol parameter for a hierarchical optimization but my rationale is as follows: When optimizing the first objective, I am adding a penal...
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Alexia Payanさんが投稿を作成しました:
Hierarchical optimization and RelTol
回答済みHello, I am trying to maximize the revenues from building various products while minimizing the number of machines used to make those products (i.e. increase the utilization of these machines). The...
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Alexia Payanさんがコメントを作成しました:
Hello Silke, I have a question regarding the use of the max_ function. I noticed that using it slows down the optimization somewhat. Is this because it is technically not a linear constraint? Have ...
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Alexia Payanさんが投稿を作成しました:
Very slow hierarchical objective optimization
回答済みI a considering a hierarchical objective optimization. The first objective already takes a long time to "solve" to a given gap, say 3%. When adding the second objective, the runtime is increased b...
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Alexia Payanさんがコメントを作成しました:
Hello Juan, Thank you for your reply. Regarding both the "cutoff" case and the "infeasible" case, can I still trust the "optimal" solution that is being provided by the optimizer? Also, does this ...
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Alexia Payanさんが投稿を作成しました:
Cutoff and optimal solution
回答済みHello All, I get the following output from my model solve: What does the current node "cutoff" objective mean? I still get an optimal solution printout after this happens with a gap of 11.1% corre...
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Alexia Payanさんがコメントを作成しました:
Hello Jaromil, Thank you for your reply. This prints the relaxed solution for the current node being explored but this does not necessarily corresponds to the Best Bound solution. What I am looking...
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Alexia Payanさんが投稿を作成しました:
Printing best bound solution for MIP problem
回答済みHello All, Is it possible to print the LP solution corresponding to the best bound objective value at a given time during the optimization, for example when an integer solution to the MIP is found?...