ZOLESIO , Jean-Paul

We model the coupled system formed by an incompressible, irrotational fluid and a nonlinear elastic body. We work with large displacement, small deformation elasticity (or St Venant elasticity), which makes the problem very interesting from the physical point of view. The elastic body is three-dimensional $\Omega \in \mathbb{R}^3$, and thus it...

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Accurate electromagnetic modeling is often too time-consuming. Solving electromagnetic scattering and radiation problems with moment methods or finite-element methods over a large frequency band requires the computer code to be run for every frequency sample. This is too expensive. So we propose a fast auto-adaptive method to optimize the...

Electromagnetic modeling provides high accuracy but is often too time-consuming. Solving electromagnetic scattering and radiation problems with moment methods or finite element methods over a large frequency band requires the computer code to be run for every frequency sample. This is too expensive. So we propose a fast, accurate methodology...

Electromagnetic modeling provides high accuracy but is often too time-consuming. Solving electromagnetic scattering and radiation problems with moment methods or finite element methods over a large frequency band requires the computer code to be run for every frequency sample. This is too expensive. So we propose a fast, accurate methology for...

Solving electromagnetic scattering and radiation problems with moment methods or finite element methods over a large frequency band gives accurate results, but it is often too time-consuming. So we propose a fast auto-adaptive method to optimize the computational electromagnetics solver applied in the case of various radiating and dielectric...

Solving electromagnetic scattering and radation problems, by finite element method or moment method, in spectral domain over a frequency band, is time consuming as it is necessary to run the computer model for every frequency band sample. Our aim is to determine the values of th current flow at the antenna surface over the frequency band using...

The controlled evolution of level sets provides a successful framework to solve time-harmonic inverse scattering problems for objects whose contrast with the environment is known but whose shape is unknown. New solution tools extend this framework to the retrieval of objects whose both shape and contrast are unknown

International audience

International audience

A shape-gradient optimization based on contour deformations by means of Level Set method is used for reconstructing 2-D and 3-D perfectly conducting objects electromagnetic imaging. A frequency hopping technique is applied during the inverse scattering procedure for first locating the objects and reconstruct them roughly, then with higher...