Régis SABBADIN
De WikiZ.
Régis Sabbadin has been a research scientist in the Biometry and Artificial Intelligence laboratory in Toulouse, since 1999.
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Brief bio
Diplomas:
- Engineer degree in aeronautics from the ENSICA school in Toulouse in 1993
- PhD degree in Computer Science from the University of Toulouse, on An ordinal approach to decision under uncertainty: Axiomatization, logical representation and application to sequential decision-making in 1998.
- "Habilitation à diriger des Recherches" from the University of Toulouse, on Models and algorithms for sequential decision under uncertainty in 2009.
My research focuses on Artificial Intelligence methods for automated decision in sequential decision problems under uncertainty:
- In the past years, I have spent a lot of time working on qualitative approaches to decision making, mainly based on the qualitative Possibility theory.
- More recently, I have started to work on complex factored decision problems linked to agricultural and natural resource management problems, especially in epidemiology, agroforestry and wildlife preservation. The research issues are the control of spatio-temporal processes and the design of sampling methods for spatial processes. The methods developed for both research issues rely, more or less heavily, on the Markov Decion Processes framework.
Research themes
- Qualitative approaches to decision making
- Control of spatio-temporal processes
- Design of sampling methods for spatial processes
Selected recent publications
Around Markov decision processes
- Sabbadin (R.), Peyrard (N.) and Forsell (N.). A framework and a mean-field algorithm for the local control of spatial processes. International Journal of Approximate Reasoning, 2011.
- Sabbadin (R.). Decision-making Process - Concepts and Methods, chap. Planning under Uncertainty with Markov Decision Processes, pp. 541--577. ISTE-Wiley. Eds. D. Bouyssou, D. Dubois, M. Pirlot et H. Prade, 2009.
- Sabbadin (R.), Lang (J.) and Ravoanjanahry (N.). Purely epistemic Markov decision processes 22nd AAAI Conference on Artificial Intelligence (AAAI'07), pp. 1057--1062. Vancouver, Canada, 2007.
Qualitative decision under uncertainty
- Dubois (D.), Fargier (H.), Prade (H.) and Sabbadin (R.). Decision-making Process - Concepts and Methods, chap. A Survey of Qualitative Decision Rules Under Uncertainty, pp. 435--473. ISTE-Wiley. Eds. D. Bouyssou, D. Dubois, M. Pirlot et H. Prade, 2009.
- Garcia (L.) and Sabbadin (R.). Complexity results and algorithms for possibilistic influence diagrams. Artificial Intelligence, vol. 172, pp. 1018-1044, 2008.
- Fargier (H.) and Sabbadin (R.). Qualitative decision under uncertainty: back to expected utility. Artificial Intelligence, vol. 165, pp. 245--280, 2005.
Environment and natural resources management
- Forsell (N.), Wikström (P.), Garcia (F.), Sabbadin (R.), Blennow (K.) and Eriksson (L. O.). Management of the risk of wind damage in forestry: a graph-based Markov decision process approach. Annals of Operations Research (online, February 2009).
- Sabbadin (R.), Spring (D.) and Rabier (C.-E.). Dynamic reserve site selection under contagion risk of deforestation. Ecological Modelling, vol. 201, pp. 75--81, 2007.
- Peyrard (N.), Sabbadin (R.), Lô-Pelzer (E.) and Aubertot (J.~N.). A graph-based Markov decision process framework for optimising integrated management of diseases in agriculture. MODSIM'07 International Congress on Modelling and Simulation. pp. 2175-2181, Christchurch, New-Zealand, 2007.
Project participations
- Australian Research Council (ARC): Applying search theory for eradicating invasive species (2007-2009).
- French "ANR" project: Comment Exploiter Durablement les REsistances (CEDRE) (2005-2008).
- French "CCRDT" project, Région Midi-Pyrénées: Les forêts fragmentées dans les territoires et les exploitations agricoles de Midi-Pyrénées (2002-2004).
PhD and Master Students
- Mathieu BONNEAU (PhD), cosupervised with S. Gaba (INRA-SPE, Dijon) and N. Peyrard (INRA-MIA, Toulouse).Développement d'une méthode adaptative d'échantillonnage spatialisé pour caractériser la composition du stock semencier des espèces adventices à l'échelle de la mosaïque paysagère, (2009- ).
- Nicklas FORSELL (PhD) with F. Garcia (INRA-MIA, Toulouse), L.-O. Eriksson (SLU, Umea, Sweden) and P. Wikström (SLU, Umea, Sweden). MDP Approaches for Complex Forest Planning Under Uncertainty, (2005-2009).
- Nasolo RAVOANJANAHARY (PhD) with J. Lang (CNRS-UPS, Toulouse). Processus décisionnels épistémiques et élicitation interactive de préférences, (2004-2008).
- Mathieu BONNEAU (Master "Ingénierie Mathématique A Toulouse", option statistiques), cosupervised with N. Peyrard. Echantillonnage spatial optimal basé sur la méthode du krigeage , 2009.
- Usman FARROKH (Master "Informatique et Télécommunications, option intelligence artificielle), cosupervised with N. Peyrard. Echantillonnage spatial optimal pour la reconstruction de cartes d'occurrence, 2009.
- Benjamin BORGY (Master "Biostatistiques et Modélisation"), cosupevised with J.-N. Aubertot and N. Peyrard. Exploitation du cadre des PDM sur graphe pour l'aide à la conception de stratégies de gestion collectives de résistances variétales au phoma du colza, 2008.
- Lamine CONDE (Master "Probabilité et Statistique), cosupervised with N. Peyrard. Extension du cadre des PDMG pour l'optimisation de la structure de réseaux d'interactions dans les processus spatio-temporels, 2007.
- Nasolo RAVOANJANAHARY (DEA Intelligence Artificielle), cosupervised J. Lang). Planification Purement Epistémique, 2004.
- Malia MOUTERFI (DEA Systèmes Industriels). Processus Décisionnels de Markov et Graphes : application à un problème de gestion environnementale, 2004.
Teaching
I have been teaching regularly, between 20h and 50H per year since 2002. This teaching activity is linked to my research fields (operations research and decision under uncertainty). A significant part of this teaching activity has been directed to foreign students, and performed in english:
- NOVA PhD Course (SLU-Umea, Sweden). Markov Decision Processes, 20h (2008).
- Master 2 Biostatistique et Modélisation, (UPS, Toulouse). Processus Décisionnels de Markov, 15h/year (2005- ).
- Master 1 Agrofood Chain, (UPS - Agricampus, Toulouse). Operations Research, 6h/year (2005- ).
- Ecole Supérieure de Commerce de Rennes (Rennes). Operations Research, 40h/year (2002-2006).
What do I look like (on a rugby field)?
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