28 datasets found

In a large class of modern applications, we have to estimate the initial (or final) state of an infinite-dimensional system (typically a system governed by a Partial...

The main objective of this thesis is to use asymptotic models for the resolution of inverse electromagnetic scattering problems. We consider in particular the case of...

The objective of this work is to propose reliable, efficient and fast methods for minimizing convex criteria, that are found in inverse problems for imagery. We focus...

This work concerns the representation and approximation of functions on a sphere with applications to source localization inverse problems in geodesy and medical...

This thesis is about inverse problems in acoustic scattering for inhomogeneous media with far-field measurements. In the first part of our work, we are interested in...

The thesis focuses on precision aspects of 3D reconstruction with a particular emphasis on camera distortion correction. The causes of imprecisions in stereoscopy can...

In order to satisfy the need for handheld infrared spectrometers, the ONERA developed a new concept called MICROSPOC. This device is an infrared focal plane array with...

Many questions of glaciological interest can be recognized as inverse problems. In this thesis, l illustrate this point through three examples: * Reconstruction of...

Modelling cardiac electrophysiology for arrhythmias in silico has been an important research topic for the last decades. In order to translate this important progress...

Nous nous intéressons ici aux problèmes inverses mal posés ainsi qu'à leur résolution dans un cadre bayésien. Dans un premier temps, nous décrirons la démarche que...

Various fields of experimental science are constantly requiring smaller resolution for optical microscopy. In this thesis are presented several works for improving...

We consider the stability in the inverse problem consisting in the determination of an electric potential $q$, appearing in a Dirichlet initial-boundary value problem...

The recent impressive growth of Internet in the last two decades lead to an increased need of techniques to measure its structure and its performance. Network...

In the last decade, microwave and millimeter-wave systems have gained importance in civil and security applications. Due to an increasing maturity and availability of...

This research focuses on high contrast multispectral imaging in the view of directly detecting and characterizing Exoplanets. In this framework, the development of...

Study of growth-fragmentation equations and application in biology

Synthetic Aperture Radar (SAR) imaging is a well-known technique in the domain of remote sensing, aerospace surveillance, geography and mapping. To obtain images of...

Performances of remote-sensing satellite instruments have been increasing fast thanks to developing technologies but also thanks to the better understanding and...

This thesis mainly concerns the resolution of dynamic inverse problems involvingnonlinear dynamical systems. A set of techniques based on the use of trains of...

The main topic of this thesis concerns the polynomial approximation of aleatory functions by means of the random discrete L2 projection, and its application to inverse...