Publications de Michaël Clément Louis Ghislain Thémans

City Automated Transport System (CATS): The Legacy of an Innovative European Project

Vincent Kaufmann, Philippe Vollichard, Michel Bierlaire, Michaël Clément Louis Ghislain Thémans, Sonia Lavadinho, Raphaël Gindrat, Susana Da Silva Rodrigues Limão, Stéphanie Vincent, Derek Pierre Christie, Arnaud de La Fortelle

CATS is a collaborative European project promoting driverless vehicles that ended in December 2014. This contribution explains how the project evolved, including the handling of unexpected events and concentrating on lessons learned. The constructor and ve ...

2015

Forecasting the demand for electric vehicles: accounting for attitudes and perceptions

Michel Bierlaire, Michaël Clément Louis Ghislain Thémans, Aurélie Glerum, Lidija Stankovikj

In the context of the arrival of electric vehicles on the car market, new mathematical models are needed to understand and predict the impact on the market shares. This research provides a comprehensive methodology to forecast the demand of a technology wh ...

Informs2014

A heuristic for nonlinear global optimization

Nicolas Zufferey, Michel Bierlaire, Michaël Clément Louis Ghislain Thémans

We propose a new heuristic for nonlinear global optimization combining a variable neighborhood search framework with a modified trust-region algorithm as local search. The proposed method presents the capability to prematurely interrupt the local search if ...

2010

Dealing with singularities in nonlinear unconstrained optimization

Michel Bierlaire, Michaël Clément Louis Ghislain Thémans

We propose a new trust region based optimization algorithm for solving unconstrained nonlinear problems whose second derivatives matrix is singular at a local solution. We give a theoretical characterization of the singularity in this context and we propos ...

2009

A heuristic for nonlinear global optimization

Nicolas Zufferey, Michel Bierlaire, Michaël Clément Louis Ghislain Thémans

We propose a new heuristic for nonlinear global optimization combining a variable neighbourhood search framework with a modified trust-region algorithm as local search. The proposed method presents the capability to prematurely interrupt the local search i ...

2008

A heuristic for nonlinear global optimization

Nicolas Zufferey, Michel Bierlaire, Michaël Clément Louis Ghislain Thémans

We propose a new heuristic for nonlinear global optimization combining a variable neighborhood search framework with a modified trust-region algorithm as local search. The proposed method presents the capability to prematurely interrupt the local search if ...

2008

Numerical methods and models relevant to transportation applications

Michaël Clément Louis Ghislain Thémans

In this thesis, we focus on standard classes of problems in numerical optimization: unconstrained nonlinear optimization as well as systems of nonlinear equations. More precisely, we consider two types of unconstrained nonlinear optimization problems. On t ...

EPFL2007

A multi-iterate method to solve systems of nonlinear equations

Frank Crittin, Michel Bierlaire, Michaël Clément Louis Ghislain Thémans

We propose an extension of secant methods for nonlinear equations using a population of previous iterates. Contrarily to classical secant methods, where exact interpolation is used, we prefer a least squares approach to calibrate the linear model. We propo ...

2007

Analysis of driver's response to real-time information in Switzerland

Michel Bierlaire, Michaël Clément Louis Ghislain Thémans

2006