Search Results for author: Thomas Guyet

Found 19 papers, 4 papers with code

Clustering of timed sequences -- Application to the analysis of care pathways

no code implementations23 Apr 2024 Thomas Guyet, Pierre Pinson, Enoal Gesny

These methods are then applied in clustering algorithms to propose original and sound clustering algorithms for timed sequences.

SWoTTeD: An Extension of Tensor Decomposition to Temporal Phenotyping

1 code implementation2 Oct 2023 Hana Sebia, Thomas Guyet, Etienne Audureau

Tensor decomposition has recently been gaining attention in the machine learning community for the analysis of individual traces, such as Electronic Health Records (EHR).

Tensor Decomposition

A survey on the semantics of sequential patterns with negation

no code implementations20 Sep 2023 Thomas Guyet

A sequential pattern with negation, or negative sequential pattern, takes the form of a sequential pattern for which the negation symbol may be used in front of some of the pattern's itemsets.

Negation

Temporal Disaggregation of the Cumulative Grass Growth

no code implementations21 Dec 2022 Thomas Guyet, Laurent Spillemaecker, Simon Malinowski, Anne-Isabelle Graux

To address this problem, our method applies time series forecasting using climate information and grass growth from previous time steps.

Time Series Time Series Forecasting

Experimental study of time series forecasting methods for groundwater level prediction

1 code implementation28 Sep 2022 Michael Franklin Mbouopda, Thomas Guyet, Nicolas Labroche, Abel Henriot

Each time series is made of daily measurements of groundwater levels and two exogenous variables, rainfall and evapotranspiration.

Management Time Series +1

Semantics of negative sequential patterns

no code implementations17 Feb 2020 Thomas Guyet, Philippe Besnard

In the field of pattern mining, a negative sequential pattern is specified by means of a sequence consisting of events to occur and of other events, called negative events, to be absent.

Day-ahead time series forecasting: application to capacity planning

no code implementations6 Nov 2018 Colin Leverger, Vincent Lemaire, Simon Malinowski, Thomas Guyet, Laurence Rozé

In the context of capacity planning, forecasting the evolution of informatics servers usage enables companies to better manage their computational resources.

Clustering Time Series +1

NegPSpan: efficient extraction of negative sequential patterns with embedding constraints

no code implementations4 Apr 2018 Thomas Guyet, René Quiniou

Such patterns inform about which events are frequently observed in sequences, i. e. what does really happen.

Efficiency Analysis of ASP Encodings for Sequential Pattern Mining Tasks

no code implementations14 Nov 2017 Thomas Guyet, Yves Moinard, René Quiniou, Torsten Schaub

We propose encodings of the classical sequential pattern mining tasks within two representations of embeddings (fill-gaps vs skip-gaps) and for various kinds of patterns: frequent, constrained and condensed.

Sequential Pattern Mining

Mining relevant interval rules

no code implementations11 Sep 2017 Thomas Guyet, René Quiniou, Véronique Masson

This article extends the method of Garriga et al. for mining relevant rules to numerical attributes by extracting interval-based pattern rules.

Discriminant chronicles mining: Application to care pathways analytics

no code implementations11 Sep 2017 Yann Dauxais, Thomas Guyet, David Gross-Amblard, André Happe

Pharmaco-epidemiology (PE) is the study of uses and effects of drugs in well defined populations.

Epidemiology

Declarative Sequential Pattern Mining of Care Pathways

no code implementations26 Jul 2017 Thomas Guyet, André Happe, Yann Dauxais

Sequential pattern mining algorithms are widely used to explore care pathways database, but they generate a deluge of patterns, mostly redundant or useless.

Sequential Pattern Mining

Dense Bag-of-Temporal-SIFT-Words for Time Series Classification

no code implementations8 Jan 2016 Adeline Bailly, Simon Malinowski, Romain Tavenard, Thomas Guyet, Laetitia Chapel

In this paper, we design a time series classification scheme that builds on the SIFT framework adapted to time series to feed a Bag-of-Words.

Classification General Classification +4

Using Answer Set Programming for pattern mining

no code implementations27 Sep 2014 Thomas Guyet, Yves Moinard, René Quiniou

Serial pattern mining consists in extracting the frequent sequential patterns from a unique sequence of itemsets.

Sequential Pattern Mining

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