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Contribution à la modélisation et à la prise en compte informatique de niveaux de descriptions multiples.
Application aux écosystèmes aquatiques
Penicillo haere, nam scalas aufero

Abstract : Most sciences use simulation in their usual cycle of self-construction. The focus of our work is improving the handling of multiple scales in computer simulations. We have therefore to understand how different sciences build themselves, and how this epistemology relates to simulation.
The present work therefore starts with a chapter summing up various epistemological tendencies and endeavors to link them to our present goal. The second chapter more specifically presents what is meant by multiple scales or level of description in different scientific work, with an emphasis on what is closer to our future main application, hydrodynamics in ecosystems model.
Chapter 3 presents the early application that in fact prompted the present work, a system meant to improve intelligibility in a written communication system during emergency situations, by using the shape and the dynamics of the discourse itself to help summing up the semantics.
Follows afterwards a summing up of what ecology delves into, the importance of fluxes in modern ecosystems model, and the main approaches of fluid flow modeling in current hydrodynamics. This leads to the relative novelty of our work, which is an application to handling different scales in a fluid flow simulation, with a view to integration in a more complex ecosystems simulation. We use a standard model called vortex based upon which we apply two different schemes to detect structures or organizations in the midst of the simulation. One of these leads to the replacement of the basic particles that self-organized to a new simulation entity that represents this organization or structure. The metaphorical social life of these entities can lead to the creation of still new scales of description, in a iterative theoretical upper open-ended way.
We conclude with the integration of an article (in English) that emphasizes how this work will lead to a more developed ecosystems simulation, and what the ties are.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00394623
Contributor : Pierrick Tranouez <>
Submitted on : Friday, June 12, 2009 - 11:20:15 AM
Last modification on : Tuesday, February 5, 2019 - 11:44:22 AM
Long-term archiving on: : Friday, June 11, 2010 - 12:39:16 AM

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  • HAL Id : tel-00394623, version 1

Citation

Pierrick Tranouez. Contribution à la modélisation et à la prise en compte informatique de niveaux de descriptions multiples.
Application aux écosystèmes aquatiques
Penicillo haere, nam scalas aufero. Modélisation et simulation. Université du Havre, 2005. Français. ⟨tel-00394623⟩

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