hal.structure.identifier | Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL] | |
hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres [LERMA] | |
dc.contributor.author | PALUD, Pierre | |
hal.structure.identifier | Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL] | |
dc.contributor.author | CHAINAIS, Pierre | |
hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres [LERMA] | |
dc.contributor.author | LE PETIT, Franck | |
hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres [LERMA] | |
dc.contributor.author | BRON, Emeric | |
hal.structure.identifier | Criteo AI Lab | |
dc.contributor.author | VONO, Maxime | |
hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
dc.contributor.author | EINIG, Lucas | |
hal.structure.identifier | Instituto de Física Fundamental [Madrid] [IFF] | |
dc.contributor.author | GARCIA SANTA-MARIA, Miriam | |
hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
dc.contributor.author | GAUDEL, Mathilde | |
hal.structure.identifier | Department of Space, Earth and Environment, Chalmers University of Technology | |
dc.contributor.author | ORKISZ, Jan | |
hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
dc.contributor.author | MAGALHAES, Victor De Souza | |
hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
dc.contributor.author | BARDEAU, Sébastien | |
hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA] | |
dc.contributor.author | GERIN, Maryvonne | |
hal.structure.identifier | Instituto de Física Fundamental [Madrid] [IFF] | |
dc.contributor.author | GOICOECHEA, Javier | |
hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
hal.structure.identifier | Université Sciences et Technologies - Bordeaux 1 [UB] | |
hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
dc.contributor.author | GRATIER, Pierre | |
hal.structure.identifier | Joint ALMA Observatory [JAO] | |
dc.contributor.author | GUZMAN, Viviana | |
hal.structure.identifier | Department of Space, Earth and Environment, Chalmers University of Technology | |
dc.contributor.author | KAINULAINEN, Jouni | |
hal.structure.identifier | Laboratoire de Radioastronomie | |
dc.contributor.author | LEVRIER, François | |
hal.structure.identifier | School of Physics and Astronomy [Cardiff] | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | PERETTO, Nicolas | |
hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
dc.contributor.author | PETY, Jérôme | |
hal.structure.identifier | PhyTI [PhyTI] | |
dc.contributor.author | ROUEFF, Antoine | |
hal.structure.identifier | Instituto de RadioAstronomía Milimétrica [IRAM] | |
dc.contributor.author | SIEVERS, Albrecht | |
dc.date.conference | 2022-08-29 | |
dc.description.abstractEn | This work considers a challenging radio-astronomyinverse problem of physical parameter inference from multispec-tral observations. The forward model underlying this problem isa computationally expensive numerical simulation. In addition,the observation model mixes different sources of noise yieldinga non-concave log-likelihood function. To overcome these issues,we introduce a likelihood approximation with controlled error.Given the absence of ground truth, parameter inference isconducted with a Markov chain Monte Carlo (MCMC) algorithmto provide credibility intervals along with point estimates. To thisaim, we propose a new sampler that addresses the numericalchallenges induced by the observation model, in particular thenon-log-concavity of the posterior distribution. The efficiency ofthe proposed method is demonstrated on synthetic yet realisticastrophysical data. We believe that the proposed approach isvery general and can be adapted to many similar difficult inverseproblems | |
dc.description.sponsorship | Inférence rapide et contrôle de l'incertitude: applications aux observations astrophysiques. - ANR-20-CHIA-0031 | |
dc.description.sponsorship | ULNE - ANR-16-IDEX-0004 | |
dc.language.iso | en | |
dc.subject.en | Inverse problem | |
dc.subject.en | Bayesian inference | |
dc.subject.en | Markov chain Monte Carlo algorithm | |
dc.subject.en | multiplicative noise | |
dc.title.en | Mixture of noises and sampling of non-log-concave posterior distributions | |
dc.type | Communication dans un congrès | |
dc.subject.hal | Informatique [cs]/Traitement du signal et de l'image | |
bordeaux.conference.title | 2022 30th European Signal Processing Conference (EUSIPCO) | |
bordeaux.country | RS | |
bordeaux.conference.city | Belgrade | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-03953035 | |
hal.version | 1 | |
hal.invited | non | |
hal.proceedings | non | |
hal.conference.end | 2022-09-02 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-03953035v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=PALUD,%20Pierre&CHAINAIS,%20Pierre&LE%20PETIT,%20Franck&BRON,%20Emeric&VONO,%20Maxime&rft.genre=unknown | |