Lp‐norm regularization approaches in variational data assimilation
Antoine Bernigaud
,
Serge Gratton
,
Flavia Lenti
,
Ehouarn Simon
,
Oumaima Sohab
et al.
Quarterly Journal of the Royal Meteorological Society , 2021, 147, pp.2067 - 2081.
⟨10.1002/qj.4010⟩
Journal articles
hal-03160275v1
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A note on inexact inner products in GMRES
Serge Gratton
,
Ehouarn Simon
,
David Titley-Peloquin
,
Philippe Toint
SIAM Journal on Matrix Analysis and Applications , 2022, 43 (3)
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hal-03637231v1
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Experiences in multiyear combined state-parameter estimation with an ecosystem model of the North Atlantic and Arctic Oceans using the Ensemble Kalman Filter.
Ehouarn Simon
,
Annette Samuelsen
,
Laurent Bertino
,
Sandrine Mouysset
Journal articles
hal-02960624v1
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Guaranteeing the convergence of the saddle formulation for weakly constrained 4D‐Var data assimilation
Serge Gratton
,
Selime Gürol
,
Ehouarn Simon
,
Philippe Toint
Quarterly Journal of the Royal Meteorological Society , 2018, 144 (717), pp.2592-2602.
⟨10.1002/qj.3355⟩
Journal articles
hal-02959392v1
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Neural Prediction Model for Transition Onset of a Boundary-Layer in Presence of 2D Surface Defects
Adrien Rouvière
,
Lucas Pascal
,
Fabien Méry
,
Ehouarn Simon
,
Serge Gratton
et al.
AIAA SCITECH 2022 Forum , Jan 2022, San Diego, CA (virtual), United States. pp.AIAA 2022-1073,
⟨10.2514/6.2022-1073⟩
Conference papers
hal-03510042v1
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Multigrid algorithms and local mesh refinement methods in the context of variational data assimilation
Laurent Debreu
,
Emilie Neveu
,
François Xavier Le Dimet
,
Ehouarn Simon
Eric Blayo; Marc Bocquet; Emmanuel Cosme; F. Cugliandolo Leticia.
Advanced Data Assimilation for Geosciences: Lecture Notes of the Les Houches School of Physics: Special Issue, June 2012 ,
Oxford University Press , pp.576, 2014, Lecture notes of "Les Houches" summer school 2012, 9780198723844.
⟨10.1093/acprof:oso/9780198723844.003.0017⟩
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hal-01095939v1
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An algorithm for the minimization of nonsmooth nonconvex functions using inexact evaluations and its worst-case complexity
Serge Gratton
,
Ehouarn Simon
,
Philippe Toint
Journal articles
hal-02943960v1
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Neural prediction model for transition onset of a boundary-layer in presence of 2D surface defects
Adrien Rouviere
,
Lucas Pascal
,
Fabien Méry
,
Ehouarn Simon
,
Serge Gratton
et al.
56th 3AF International Conference on Applied Aerodynamics (AERO 2022) , Association Aéronautique et Astronautique de France (3AF), Mar 2022, Toulouse, France. pp.1073,
⟨10.2514/6.2022-1073⟩
Conference papers
hal-03909124v1
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A note on preconditioning weighted linear least-squares, with consequences for weakly constrained variational data assimilation
Serge Gratton
,
Selime Gürol
,
Ehouarn Simon
,
Philippe Toint
Quarterly Journal of the Royal Meteorological Society , 2018, 144 (712), pp.934-940.
⟨10.1002/qj.3262⟩
Journal articles
hal-02959395v1
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A Deep Learning Approach for Estimation of the Nearshore Bathymetry
Rachid Benshila
,
Grégoire Thoumyre
,
Mahmoud Al Najar
,
Grégoire Abessolo
,
Rafael Almar
et al.
Journal articles
hal-02769859v1
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Online tuning of ocean biogeochemical model parameters using ensemble estimation techniques: Application to a one-dimensional model in the North Atlantic
M.E. Gharamti
,
A. Samuelsen
,
L. Bertino
,
Ehouarn Simon
,
A. Korosov
et al.
Journal articles
hal-02960626v1
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Issues in making the weakly-constrained 4DVar formulation computationally efficient
Serge Gratton
,
Selime Gurol
,
Ehouarn Simon
,
Philippe Toint
Griewank, Andreas; Reich, Sebastian; Roulstone, Ian; Stuart, Andrew.
Mathematical and Algorithmic Aspects of Data Assimilation in the Geosciences , 13 (4),
Mathematisches Forschungsinstitut Oberwolfach , pp.2705-2748, 2017, Oberwolfach Reports, ISSN: 1660-8933.
⟨10.4171/OWR/2016/47⟩
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hal-03176447v1
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Neural Prediction Model for Transition Onset of a Boundary-Layer in Presence of 2D Surface Defects
Adrien Rouvière
,
Lucas Pascal
,
Fabien Méry
,
Ehouarn Simon
,
Serge Gratton
et al.
22th ONERA-DLR Aerospace Symposium (ODAS 2022) , Jun 2022, Hamburg, Germany. pp.1-10
Conference papers
hal-03774047v1
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Minimizing convex quadratics with variable precision conjugate gradients
Serge Gratton
,
Ehouarn Simon
,
David Titley-Peloquin
,
Philippe Toint
Numerical Linear Algebra with Applications , 2021, 28 (e2337)
Journal articles
hal-02959082v1
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Multigrid solvers and multigrid preconditioners for the solution of variational data assimilation problems
Laurent Debreu
,
Emilie Neveu
,
Ehouarn Simon
,
François-Xavier Le Dimet
,
Arthur Vidard
et al.
Quarterly Journal of the Royal Meteorological Society , 2016, 142 (694), pp.515-528.
⟨10.1002/qj.2676⟩
Journal articles
hal-00874643v1
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Exploiting variable precision in GMRES
Serge Gratton
,
Ehouarn Simon
,
David Titley-Peloquin
,
Philippe Toint
2020
Preprints, Working Papers, ...
hal-02943241v1
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Les algorithmes et la puissance de calcul dans les techniques de prévision pour les géosciences en grande dimension vus sous l'angle de l'optimisation mathématique
Serge Gratton
,
Selime Gürol
,
Ehouarn Simon
,
Philippe Toint
Colloque Modélisation : succès et limites (2016) , Dec 2016, Paris, France. pp.37-47
Conference papers
hal-03636585v1
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Observation thinning in data assimilation computations
Serge Gratton
,
Monserrat Rincon-Camacho
,
Ehouarn Simon
,
Philippe Toint
Journal articles
hal-02960628v1
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