Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Stéphane Operto"'
Autor:
Jean-Xavier Dessa, Marie-Odile Beslier, Laure Schenini, Nicolas Chamot-Rooke, Nicolà Corradi, Matthias Delescluse, Jacques Déverchère, Christophe Larroque, Serge Sambolian, Albane Canva, Stéphane Operto, Alessandra Ribodetti, Hans Agurto-Detzel, Cédric Bulois, Caroline Chalumeau, Laure Combe
Publikováno v:
Geosciences, Vol 10, Iss 3, p 108 (2020)
The north Ligurian margin is a complex geological area in many ways. It has witnessed several phases of highly contrasting deformation styles, at both crustal scale and that of shallower cover tectonics, simultaneously or in quick succession, and wit
Externí odkaz:
https://doaj.org/article/fd9e4e27fa21489c9cf9bd0333773e6a
Publikováno v:
GEOPHYSICS. 88:R339-R354
Full-waveform inversion (FWI) is a nonlinear optimization problem that addresses the estimation of subsurface model parameters by matching the predicted to the observed seismograms. We formulate FWI as a constrained optimization problem in which the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::881efc606fa34fa80e4341fbc25d1e73
https://doi.org/10.1190/geo2022-0343.1
https://doi.org/10.1190/geo2022-0343.1
Publikováno v:
GEOPHYSICS. 87:R305-R324
Efficient frequency-domain full-waveform inversion (FWI) of long-offset node data can be performed with a few frequencies. The seismic response of these frequencies can be computed with compact finite-difference stencils on regular Cartesian grid wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95bf44ed1549aa399d5f507d9ce3510e
https://doi.org/10.1190/geo2021-0606.1
https://doi.org/10.1190/geo2021-0606.1
Publikováno v:
Geophysics
Geophysics, Society of Exploration Geophysicists, 2022, 87 (1), pp.R79-R91. ⟨10.1190/geo2021-0409.1⟩
Geophysics, Society of Exploration Geophysicists, 2022, 87 (1), pp.R79-R91. ⟨10.1190/geo2021-0409.1⟩
International audience; The augmented Lagrangian (AL) method provides a flexible and efficient framework for solving extended-space full-waveform inversion (FWI), a constrained nonlinear optimization problem whereby we seek model parameters and wavef
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bd1012cbee368046daecab83874a4a7
https://doi.org/10.1190/geo2021-0409.1
https://doi.org/10.1190/geo2021-0409.1
Autor:
Andrzej Górszczyk, Stéphane Operto
Publikováno v:
Geoscientific Model Development, Vol 14, Pp 1773-1799 (2021)
Detailed reconstruction of deep crustal targets by seismic methods remains a long-standing challenge. One key to address this challenge is the joint development of new seismic acquisition systems and leading-edge processing techniques. In marine envi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a2a9f812e2f3afa04a6c00122ec9749
https://doi.org/10.5194/gmd-14-1773-2021
https://doi.org/10.5194/gmd-14-1773-2021
Publikováno v:
Geophysics
Geophysics, Society of Exploration Geophysicists, 2021, 86 (2), pp.R237. ⟨10.1190/geo2020-0478.1⟩
Geophysics, Society of Exploration Geophysicists, 2021, 86 (2), pp.R237. ⟨10.1190/geo2020-0478.1⟩
Efficient frequency-domain full-waveform inversion (FD-FWI) of wide-aperture data is designed by limiting inversion to a few frequencies and by solving the Helmholtz equation with a direct solver to process multiple sources efficiently. Some variants
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::205d3bac537b7d29d0aa276db1bac08a
https://doi.org/10.1190/geo2020-0478.1
https://doi.org/10.1190/geo2020-0478.1
Publikováno v:
Photons Plus Ultrasound: Imaging and Sensing 2022.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a0f976e05b8176a35f68beae879fd63
https://doi.org/10.1117/12.2612977
https://doi.org/10.1117/12.2612977
Publikováno v:
Geophysical Journal International
Geophysical Journal International, Oxford University Press (OUP), 2021, 2020-11-18, 224 (3), pp.1956-1979. ⟨10.1093/gji/ggaa555⟩
Geophysical Journal International, 2021, 2020-11-18, 224 (3), pp.1956-1979. ⟨10.1093/gji/ggaa555⟩
Geophysical Journal International, Oxford University Press (OUP), 2021, 2020-11-18, 224 (3), pp.1956-1979. ⟨10.1093/gji/ggaa555⟩
Geophysical Journal International, 2021, 2020-11-18, 224 (3), pp.1956-1979. ⟨10.1093/gji/ggaa555⟩
SUMMARY We revisit the hypocentre–velocity problem, which is of interest in different fields as for example microseismics and seismology. We develop a formulation based on kinematic migration of two picked kinematic attributes in the 2-D case, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::411c0f82b19f933421b71d6778625679
https://doi.org/10.1093/gji/ggaa555
https://doi.org/10.1093/gji/ggaa555
Publikováno v:
Geophysics
Geophysics, Society of Exploration Geophysicists, 2020, 85 (4), pp.R381-R396. ⟨10.1190/geo2019-0596.1⟩
Geophysics, Society of Exploration Geophysicists, 2020, 85 (4), pp.R381-R396. ⟨10.1190/geo2019-0596.1⟩
Wavefield reconstruction inversion (WRI) extends the search space of Full Waveform Inversion (FWI) by allowing for wave equation errors during wavefield reconstruction to match the data from the first iteration. Then, the wavespeeds are updated from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bb46f765e11a8e5a1d6d2741b609c52
https://doi.org/10.1190/geo2019-0596.1
https://doi.org/10.1190/geo2019-0596.1
Autor:
Niall Bootland, Victorita Dolean, Pierre Jolivet, Frédéric Nataf, Stéphane Operto, Pierre-Henri Tournier
Publikováno v:
Domain Decomposition Methods in Science and Engineering XXVI ISBN: 9783030950248
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ccc7639e422f4ab9c81a2d29b35b787
https://doi.org/10.1007/978-3-030-95025-5_2
https://doi.org/10.1007/978-3-030-95025-5_2
