no code implementations • 17 Jun 2023 • Utsav Sadana, Abhilash Chenreddy, Erick Delage, Alexandre Forel, Emma Frejinger, Thibaut Vidal
Recently there has been a surge of interest in operations research (OR) and the machine learning (ML) community in combining prediction algorithms and optimization techniques to solve decision-making problems in the face of uncertainty.
1 code implementation • 5 May 2023 • Erik Nygren, Christian Eichenberger, Emma Frejinger
Instead, we propose defining a core problem that restricts a rescheduling problem in response to a disturbance to only trains that need to be rescheduled, hence restricting the scope in both time and space.
no code implementations • 25 Oct 2022 • Sobhan Mohammadpour, Emma Frejinger
We propose a method for maximum likelihood estimation of path choice model parameters and arc travel time using data of different levels of granularity.
no code implementations • 2 May 2022 • Eric Larsen, Emma Frejinger, Bernard Gendron, Andrea Lodi
Our extensive empirical analysis is grounded in standardized families of problems derived from stochastic server location (SSLP) and stochastic multi knapsack (SMKP) problems available in the literature.
no code implementations • 7 Feb 2022 • Charly Robinson La Rocca, Emma Frejinger, Jean-François Cordeau
Current state-of-the-art solvers for mixed-integer programming (MIP) problems are designed to perform well on a wide range of problems.
no code implementations • 19 May 2021 • Greta Laage, Emma Frejinger, Gilles Savard
In practice, demand is predicted by a time series forecasting model and the periodic demand is the average of those forecasts.
no code implementations • 29 Jan 2021 • Justin Dumouchelle, Emma Frejinger, Andrea Lodi
Routinely solving such operational problems when deploying reinforcement learning algorithms may be too time consuming.
no code implementations • 13 Jan 2021 • Greta Laage, Emma Frejinger, Andrea Lodi, Guillaume Rabusseau
This is a challenging problem as it corresponds to the difference between the generated value and the value that would have been generated keeping the system as before.
1 code implementation • 17 Dec 2019 • Yoshua Bengio, Emma Frejinger, Andrea Lodi, Rahul Patel, Sriram Sankaranarayanan
We propose a novel approach using supervised learning to obtain near-optimal primal solutions for two-stage stochastic integer programming (2SIP) problems with constraints in the first and second stages.
no code implementations • 18 Oct 2019 • Emma Frejinger, Eric Larsen
This paper is devoted to the prediction of solutions to a stochastic discrete optimization problem.
no code implementations • 2 May 2019 • Maëlle Zimmermann, Emma Frejinger
The problem at the heart of this tutorial consists in modeling the path choice behavior of network users.
no code implementations • 22 Jan 2019 • Eric Larsen, Sébastien Lachapelle, Yoshua Bengio, Emma Frejinger, Simon Lacoste-Julien, Andrea Lodi
We formulate the problem as a two-stage optimal prediction stochastic program whose solution we predict with a supervised machine learning algorithm.
no code implementations • 31 Jul 2018 • Eric Larsen, Sébastien Lachapelle, Yoshua Bengio, Emma Frejinger, Simon Lacoste-Julien, Andrea Lodi
We aim to predict at a high speed the expected TDOS associated with the second stage problem, conditionally on the first stage variables.