Jean-francois Giovannelli - Academia.edu (original) (raw)
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Papers by Jean-francois Giovannelli
... Un choix classique pour la distribution a priori de l?inverse variance d?un bruit gaussien es... more ... Un choix classique pour la distribution a priori de l?inverse variance d?un bruit gaussien est la distribution de Jeffrey. ... Nous choisissons ici pour cette loi instrumentale l?a priori de ?c. La distribution (3) sera not?e par la suite P(?c). L?algorithme se d?roule ainsi : square4 G?n ...
The 8th European Conference on Antennas and Propagation (EuCAP 2014), 2014
Les photo-détecteurs utilisés en astronomie infrarougeà très bas niveau de flux présentent généra... more Les photo-détecteurs utilisés en astronomie infrarougeà très bas niveau de flux présentent généralement une rémanence lors d'un changement d'illumination. Ce phénomène transitoire est non linéaire et dissymétrique selon que le flux entrant croît ou décroît. Pour le détecteur ISOPHOT C-100 embarqué sur le satellite ISO, nous avons montré qu'un modèle semi-empirique permet de décrire avec une bonne précision (de l'ordre de quelques pour-cent) ces transitoires. Une méthode d'inversion permet de corriger ces transitoires. Les limitations de l'approche sont détaillées.
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
... L2S (CNRS-Supélec-UPS) Supélec-Plateau de Moulon 91192, Gif-sur-Yvette Cedex, France Email ..... more ... L2S (CNRS-Supélec-UPS) Supélec-Plateau de Moulon 91192, Gif-sur-Yvette Cedex, France Email ... [9] G. Roberts, A. Gelman, and W. Gilks, Weak convergence and optimal scaling of random walk metropolis algorithms, The Annals of Applied Probability, vol. 7, no. 1, pp. ...
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2007
There is a need to precisely measure concentration of proteins in biological substance for early ... more There is a need to precisely measure concentration of proteins in biological substance for early diagnosis of disease or knowledge of fundamental biological processes. Many apparatus have been proposed, and now data processing methods have to be investigated. This paper focuses on data processing of proteomic experiments combining nano liquid chromatography and mass spectrometry. Experimental fluctuations of this process raise an interest for robust methods. Consequently, we propose a model of this acquisition system and a probabilistic Bayesian method to estimate the proteins' concentrations and system parameters.
Proceedings of IEEE Ultrasonics Symposium ULTSYM-94, 1994
We address the problem of tracking slowly varying mean frequency and spectral width from a series... more We address the problem of tracking slowly varying mean frequency and spectral width from a series of data vectors yp (p=1, 2, ... P). When the yp are small-sized, usual methods (periodogram, correlation lags...) suffer from strong variability. Moreover, the discrete nature of observed signals results in ambiguity in spectral domain. First in a Gaussian setting both for the shape
IEEE Access, 2014
ABSTRACT The cells in an organism emit different amounts of proteins according to their clinical ... more ABSTRACT The cells in an organism emit different amounts of proteins according to their clinical state (healthy/pathological, for instance). The resulting proteomic profile can be used for early detection, diagnosis, and therapy planning. In this paper, we study the classification of a proteomic sample from the point of view of an inverse problem with a joint Bayesian solution, called inversion-classification. We propose a hierarchical physical forward model and present encouraging results from both simulation and clinical data.
... Un choix classique pour la distribution a priori de l?inverse variance d?un bruit gaussien es... more ... Un choix classique pour la distribution a priori de l?inverse variance d?un bruit gaussien est la distribution de Jeffrey. ... Nous choisissons ici pour cette loi instrumentale l?a priori de ?c. La distribution (3) sera not?e par la suite P(?c). L?algorithme se d?roule ainsi : square4 G?n ...
The 8th European Conference on Antennas and Propagation (EuCAP 2014), 2014
Les photo-détecteurs utilisés en astronomie infrarougeà très bas niveau de flux présentent généra... more Les photo-détecteurs utilisés en astronomie infrarougeà très bas niveau de flux présentent généralement une rémanence lors d'un changement d'illumination. Ce phénomène transitoire est non linéaire et dissymétrique selon que le flux entrant croît ou décroît. Pour le détecteur ISOPHOT C-100 embarqué sur le satellite ISO, nous avons montré qu'un modèle semi-empirique permet de décrire avec une bonne précision (de l'ordre de quelques pour-cent) ces transitoires. Une méthode d'inversion permet de corriger ces transitoires. Les limitations de l'approche sont détaillées.
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
... L2S (CNRS-Supélec-UPS) Supélec-Plateau de Moulon 91192, Gif-sur-Yvette Cedex, France Email ..... more ... L2S (CNRS-Supélec-UPS) Supélec-Plateau de Moulon 91192, Gif-sur-Yvette Cedex, France Email ... [9] G. Roberts, A. Gelman, and W. Gilks, Weak convergence and optimal scaling of random walk metropolis algorithms, The Annals of Applied Probability, vol. 7, no. 1, pp. ...
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2007
There is a need to precisely measure concentration of proteins in biological substance for early ... more There is a need to precisely measure concentration of proteins in biological substance for early diagnosis of disease or knowledge of fundamental biological processes. Many apparatus have been proposed, and now data processing methods have to be investigated. This paper focuses on data processing of proteomic experiments combining nano liquid chromatography and mass spectrometry. Experimental fluctuations of this process raise an interest for robust methods. Consequently, we propose a model of this acquisition system and a probabilistic Bayesian method to estimate the proteins' concentrations and system parameters.
Proceedings of IEEE Ultrasonics Symposium ULTSYM-94, 1994
We address the problem of tracking slowly varying mean frequency and spectral width from a series... more We address the problem of tracking slowly varying mean frequency and spectral width from a series of data vectors yp (p=1, 2, ... P). When the yp are small-sized, usual methods (periodogram, correlation lags...) suffer from strong variability. Moreover, the discrete nature of observed signals results in ambiguity in spectral domain. First in a Gaussian setting both for the shape
IEEE Access, 2014
ABSTRACT The cells in an organism emit different amounts of proteins according to their clinical ... more ABSTRACT The cells in an organism emit different amounts of proteins according to their clinical state (healthy/pathological, for instance). The resulting proteomic profile can be used for early detection, diagnosis, and therapy planning. In this paper, we study the classification of a proteomic sample from the point of view of an inverse problem with a joint Bayesian solution, called inversion-classification. We propose a hierarchical physical forward model and present encouraging results from both simulation and clinical data.