Ha Pham
French Institute for Research in Computer Science and Automation
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Publication
Featured researches published by Ha Pham.
Journal of Computational Physics | 2018
Hélène Barucq; Florian Faucher; Ha Pham
Abstract We investigate numerically the inverse problem of locating small circular obstacles in a homogeneous medium from multi-frequency back-scattered data limited to four angles of incidence. The main novelty of our paper is working with the position of the obstacles as parameter space in the frame work of full-waveform inversion (FWI) procedure. The computational cost of FWI is lowered by using a method based on single-layer potential. Reconstruction results are shown up to twenty-four obstacles, from initial guesses allowed to be far from the target. In experiments with six obstacles, we supplement the reconstruction with an analysis of the performance of the nonlinear conjugate gradient and quasi-Newton methods, in used with various line search algorithms.
Wave Motion | 2018
Hélène Barucq; Juliette Chabassier; Ha Pham; Sébastien Tordeux
Archive | 2017
Ha Pham; Hélène Barucq; Florian Faucher
Archive | 2016
Hélène Barucq; Juliette Chabassier; Ha Pham; Sébastien Tordeux
Journal of Mathematical Analysis and Applications | 2018
Izar Azpiroz; Hélène Barucq; Rabia Djellouli; Ha Pham
journées jeunes chercheur-e-s sur la résolution de problèmes d’ondes harmoniques de grande taille | 2017
Ha Pham; Hélène Barucq; Juliette Chabassier; Sébastien Tordeux
WAVES 2017 - 13th International Conference on Mathematical and Numerical Aspects of Wave Propagation | 2017
Hélène Barucq; Ha Pham; Juliette Chabassier; Sébastien Tordeux
Archive | 2017
Hélène Barucq; Henri Calandra; Ha Pham; Sébastien Tordeux
Archive | 2016
Hélène Barucq; Elodie Estecahandy; Izar Azpiroz Iragorri; Julien Diaz; Kevin Lagnoux; Florian Faucher; Ha Pham
Archive | 2016
Hélène Barucq; Juliette Chabassier; Ha Pham; Sébastien Tordeux; Aralar Erdozain; David Pardo; Victor Péron; Ignacio Muga; Lionel Boillot; Henri Calandra; Julien Diaz; Simon Ettouati; Marc Duruflé; Elvira Shishenina