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Michel Bierlaire

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Publications associées (228)

Metropolis-Hastings sampling of paths

Michel Bierlaire, Gunnar Flötteröd

We consider the previously unsolved problem of sampling paths according to a given distribution from a general network. The problem is difficult because of the combinatorial number of alternatives, which prohibits a complete enumeration of all paths and he ...

2011

Metropolis-Hastings sampling of paths

Michel Bierlaire, Gunnar Flötteröd

2011

Dynamic facial expression recognition with a discrete choice model

Michel Bierlaire, Thomas Robin, Javier Cruz Mota

A generation of new models has been proposed to handle some complex human behaviors. These models account for the data ambiguity, and there- fore extend the application field of the discrete choice modeling. The facial expression recognition (FER) is highl ...

2011

Uncertainty Feature Optimization: an implicit paradigm for problems with noisy data

Michel Bierlaire, Niklaus Eggenberg, Matteo Salani

Optimization problems with noisy data solved using stochastic programming or robust optimization approaches require the explicit characterization of an uncertainty set U that models the nature of the noise. Such approaches depend on the modeling of the unc ...

2011

Disaggregate Models with Aggregate Data: Two UrbanSim Applications

Michel Bierlaire

2010

Modelling human perception of static facial expressions

Jean-Philippe Thiran, Michel Bierlaire, Matteo Sorci, Gianluca Antonini, Thomas Robin, Javier Cruz Mota

A recent internet based survey of over 35'000 samples has shown that when different human observers are asked to assign labels to static human facial expressions, different individuals categorize differently the same image. This fact results in a lack of a ...

2010

An analysis of the implicit choice set generation using the Constrained Multinomial Logit model

Michel Bierlaire, Ricardo Daniel Hurtubia González, Gunnar Flötteröd

Discrete choice models are defined conditional to the analyst's knowledge of the actual choice set. The common practice for many years has been to assume that individual-based choice sets can be deterministically generated on the basis of the choice contex ...

National Academy of Sciences2010

Cascade of Descriptors to Detect and Track Objects Across Any Network of Cameras

Murat Kunt, Michel Bierlaire, Pierre Vandergheynst, Alexandre Massoud Alahi

Most of the multi-camera systems assume a well structured environment to detect and match objects across cameras. Cameras need to be fixed and calibrated. In this work, a novel system is presented to detect and match any objects in a network of uncalibrate ...

Elsevier2010

Constraint-specific recovery networks for solving airline recovery problems

Michel Bierlaire, Niklaus Eggenberg, Matteo Salani

In this paper, we consider the recovery of an airline schedule after an unforeseen event called disruption, making the planned schedule infeasible. We present a modeling framework that allows the consideration of operational constraints within a Column Gen ...

2010

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

Development of Prototype UrbanSim Models

Michel Bierlaire

UrbanSim is an integrated transportation land-use model that has been under development since the late 1990s. It has received a significant amount of attention in the integrated modeling community. It is well known for its disaggregated approach. A number ...

2010

Specification, estimation and validation of a pedestrian walking behavior model

Michel Bierlaire, Gianluca Antonini, Thomas Robin, Javier Cruz Mota

We propose and validate a model for pedestrian walking behavior, based on discrete choice modeling. Two main types of behavior are identified: unconstrained and constrained. By unconstrained, we refer to behavior patterns which are independent from other i ...

2009

Selected papers from the Triennial symposium on transportation analysis (TRISTAN), Phuket, Thailand, June 1115, 2007, Special Issue of Transportation Research Part C

Michel Bierlaire, Matteo Salani

2009

Geometric Video Approximation Using Weighted Matching Pursuit

Michel Bierlaire, Pierre Vandergheynst, Oscar Divorra Escoda, Gianluca Monaci

In recent years, many works on geometric image representation have appeared in the literature. Geometric video representation has not received such an important attention so far, and only some initial works in the area have been presented. Works on geometr ...

2009

Sampling of Alternatives for Route Choice Modeling

Michel Bierlaire, Emma Frejinger

This paper presents a new paradigm for choice set generation in the context of route choice model estimation. We assume that the choice sets contain all paths connecting each origin-destination pair. Although this is behaviorally questionable, we make this ...

2009

An analytic finite capacity queueing network model capturing the propagation of congestion and blocking

Michel Bierlaire, Carolina Osorio Pizano

Analytic queueing network models often assume infinite capacity queues due to the difficulty of grasping the between-queue correlation. This correlation can help to explain the propagation of congestion. We present an analytic queueing network model which ...

2009

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

BOOSTERS: a derivative-free algorithm based on radial basis functions

Rodrigue Oeuvray, Michel Bierlaire

Derivative-free optimization involves the methods used to minimize an expensive objective functionwhen its derivatives are not available. We present here a trust-region algorithmbased on Radial Basis Functions (RBFs). The main originality of our approach i ...

2009

Discrete choice models with multiplicative error terms

Michel Bierlaire

The conditional indirect utility of many random utility maximization (RUM) discrete choice models is specified as a sum of an index V depending on observables and an independent random term. In general, the universe of RUM consistent models is much larger, ...

2009

Development of prototype UrbanSim models

Michel Bierlaire, Ricardo Daniel Hurtubia González

2008

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