Search Results for author: Allou Samé

Found 10 papers, 1 papers with code

A Regression Mixture Model to understand the effect of the Covid-19 pandemic on Public Transport Ridership

1 code implementation16 Feb 2024 Hugues Moreau, Étienne Côme, Allou Samé, Latifa Oukhellou

To understand its effects on rail public transport ridership, we propose a dedicated Regression Mixture Model able to perform both the clustering of public transport stations and the segmentation of time periods, while ignoring variations due to additional variables such as the official lockdowns or non-working days.

regression

A regression model with a hidden logistic process for signal parametrization

no code implementations25 Dec 2013 Faicel Chamroukhi, Allou Samé, Gérard Govaert, Patrice Aknin

A new approach for signal parametrization, which consists of a specific regression model incorporating a discrete hidden logistic process, is proposed.

regression

Modèle à processus latent et algorithme EM pour la régression non linéaire

no code implementations25 Dec 2013 Faicel Chamroukhi, Allou Samé, Gérard Govaert, Patrice Aknin

A non linear regression approach which consists of a specific regression model incorporating a latent process, allowing various polynomial regression models to be activated preferentially and smoothly, is introduced in this paper.

regression

Model-based clustering with Hidden Markov Model regression for time series with regime changes

no code implementations25 Dec 2013 Faicel Chamroukhi, Allou Samé, Patrice Aknin, Gérard Govaert

Comparisons with existing approaches for time series clustering, including the stand EM for Gaussian mixtures, $K$-means clustering, the standard mixture of regression models and mixture of Hidden Markov Models, demonstrate the effectiveness of the proposed approach.

Clustering regression +2

Model-based clustering and segmentation of time series with changes in regime

no code implementations25 Dec 2013 Allou Samé, Faicel Chamroukhi, Gérard Govaert, Patrice Aknin

The proposed approach can also be regarded as a clustering approach which operates by finding groups of time series having common changes in regime.

Clustering Time Series +1

Model-based functional mixture discriminant analysis with hidden process regression for curve classification

no code implementations25 Dec 2013 Faicel Chamroukhi, Hervé Glotin, Allou Samé

We propose a new model-based functional mixture discriminant analysis approach based on a specific hidden process regression model that governs the regime changes over time.

General Classification regression

A regression model with a hidden logistic process for feature extraction from time series

no code implementations25 Dec 2013 Faicel Chamroukhi, Allou Samé, Gérard Govaert, Patrice Aknin

The parameters of the hidden logistic process, in the inner loop of the EM algorithm, are estimated using a multi-class Iterative Reweighted Least-Squares (IRLS) algorithm.

regression Time Series +1

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