Yuan Jiawei Yuan Jiawei
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Yuan Jiawei Yuan Jiaweiさんの最近のアクティビティ-
Yuan Jiawei Yuan Jiaweiさんがコメントを作成しました:
My Big-M constraints are defined as follows: model.AddConstr(f <= mu + rho * pi+100000 * (1-Sigma[i, j, z]), "c10");model.AddConstr(f<= 100000 * sigma, "c11"); model.AddConstr(f >= mu + rho * pi ...
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Yuan Jiawei Yuan Jiaweiさんが投稿を作成しました:
Why is using Indicator Constraints in Gurobi significantly slower than the Big-M method
回答済みIn my model, I use Gurobi's AddGenConstrIndicator to enforce the following logical constraints: However, I noticed that when using Indicator Constraints, the solver takes significantly longer to f...
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Yuan Jiawei Yuan Jiaweiさんがコメントを作成しました:
Hi, Matthias, the following is my problem: GRBVar[,,,] SeatNum = new GRBVar[TotalStaNum, TotalStaNum, TotalTypeNum, TotalSerNum]; for (int i = 0; i < TotalStaNum - 1; i++) { for (int j =...
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Yuan Jiawei Yuan Jiaweiさんが投稿を作成しました:
Opposite Signs in Gurobi Dual Variables Output
回答済みWhen I call Gurobi to output the dual variables, the outputted dual variables are exactly the opposite of the actual dual variables. Could you explain the reason for this, or provide the standard f...
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Yuan Jiawei Yuan Jiaweiさんが投稿を作成しました:
Gurobi.GRBException:“Element 0 of a double array is Nan.”
ユーザーの入力を待っています。Hi, I have a problem when I try to solve a nonlinear mixed integer problem in Gurobi and its nonlinearity is due to the existence of Napierian Logarithm. But this Gurobi.GRBException:“Element 0 o...
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Yuan Jiawei Yuan Jiaweiさんがコメントを作成しました:
Thank you very much, best wishes to you.
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Yuan Jiawei Yuan Jiaweiさんが投稿を作成しました:
some problem about adding SOS constraint
回答済みHi there, Firstly, a binary variable 'DownDepInterval[k, i, r]' is defined and I need to add the following constraints for (int k = 0; k < DownSerNum; k++){ for (int i = 0; i < TotalStaNum - 1; i+...
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Yuan Jiawei Yuan Jiaweiさんがコメントを作成しました:
Think you very much, best wishes to you.
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Yuan Jiawei Yuan Jiaweiさんが投稿を作成しました:
How to use a solution from a heuristic algorithm as the initial solution of Gurobi
回答済みRecently, I know that , if Guribi has a good initial solution, the speed of solving will be accelerated and the result may be better. Therefore, I want to use Genetic algorithm to obtain a be...