Nico T

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Recent activity by Nico T Recent activity Votes

  • Problems implementing the power function

    Awaiting user input

    Hello, I am currently trying to model the following context in Gurobi. \(App_{pd}=0.5+0.5(1-S_{pd}^{-p})\)   The code of the constraints looks something like this.    help = Model.addVars(P, D, lb=...

    Nico T 2 followers 1 comment 0 votes

  • Implementation of sub-problem aggregation makes the problem unfeasible

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    I am facing a weird problem. I am currently implementing a column generation heuristic with aggregated sub-problems (for those that are identical). I use this model decomposition and this aggregati...

    Nico T Edited 2 followers 1 comment 0 votes

  • How to implement a linear approximation?

    Answered

    Hello, I have the following question. I would like to implement a non-linear relationship in my model as a linear approximation. I want to approximate this function linearly. \(c_{i} = \exp^{-0.5\t...

    Nico T Edited 5 followers 11 comments 0 votes

  • Separate access to the dual values of various constraints

    Answered

    Hello, I have the following model. from gurobipy import *model = Model()I = [1,2,3]J = [1,2,3]D = [1,2,3]# Variablesx = model.addVars(I, J, D, vtype=GRB.BINARY, name="x")y = model.addVars(J, D, vt...

    Nico T 2 followers 4 comments 0 votes