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Solving inverse problems for the location of internal interfaces in geophysics with PGD

le 15 mai 2014
13H30

Pedro Diez de l'Universitat Politècnica de Catalunya, Espagne, interviendra le jeudi 15 mai lors d'une conférence à l'ENS Cachan.

Inverse problems to identify the geometry of internal interfaces are very common in geophysics.

For instance, aiming at identifying geological structures from surface thermal measurements. Facing this problem requires having the possibility of testing a very large number of geometric configurations combined with a variety of different material parameters (thermal diffusivity).

The number of problems explodes with number of free parameters, suggesting the use of reduced order models. We explore the use of PGD in this context, introducing the separable approximations in both the geometric and the material parameters.

The PGD approach results extremely efficient in this context, producing a computational vademecum that transforms the inverse problem into a simple functional exploration.
Type :
Séminaires - conférences
Lieu(x) :
Campus de Cachan
Amphi e-média
Bâtiment Léonard De Vinci de - ENS Cachan
61, avenue du Président Wilson 94230 Cachan
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