Monday 16th June 2025 – Inria : Buyang Li (Hong Kong Polytechnic University)
Title: TBD Abstract TBD
Category: Séminaire 2024/2025
Monday 2nd June 2025 – LJLL : Theron Guo (Massachussetts Institute of Technology)
Title: TBD Abstract TBD
Monday 19th May 2025 – Visio : Stefan Volkwein (Universität Konstanz)
Title: Adjoint-Based Calibration of Nonlinear Stochastic Differential Equation Abstract To study the nonlinear properties of complex natural phenomena, the evolution of the quantity of interest can be often represented by systems of coupled nonlinear stochastic differential equations (SDEs). These SDEs typically contain several parameters which have to be chosen carefully…
Monday 7th April 2025 – LJLL : Virginie Ehrlacher (Ecole Nationale des Ponts et Chaussées)
Title: Global space-time low-complexity numerical methods for the time-dependent Schrödinger equation Abstract The aim of this talk is to present novel global space-time methods for the approximation of the time-dependent Schrödinger equation on low-complexity manifolds. The backbone of the approach is the use of a least-square formulation of the time-dependent…
Monday 17th March 2025 – INRIA : Fabien Vergnet (Sorbonne Université)
Title: An immersed boundary method based on the resolution of an optimal control problem Abstract The numerical resolution of partial differential equations in domains with an intricate, a priori unknown or deforming over time geometry, generally induce difficulties related to mesh generation. Indeed, solving such problems requires, classically, the generation…
Monday 3rd March 2025 – LJLL : Claire Boyer (Université Paris-Saclay)
Title: A primer on physics-informed machine learning Abstract Physics-informed machine learning combines the expressiveness of data-based approaches with the interpretability of physical models. In this context, we consider a general regression problem where the empirical risk is regularized by a partial differential equation that quantifies the physical inconsistency. Practitioners often…
Monday 3rd February 2025 – LJLL : Maha Daoud (ENSTA Paris)
Title: A class of parabolic fractional reaction-diffusion systems with control of total mass: Theory and numerics Abstract: In this talk based on [1, 2], we present some new results about global-in-time existence of strong solutions to a class of fractional parabolic reaction–diffusion systems posed in a bounded open subset of…
Monday 20th January 2025 – Visio : Tabea Tscherpel (TU Darmstadt)
Title: Energy consistent time discretisation of port-Hamiltonian systems Abstract Various ordinary and partial differential equations arising from physics can be written as port-Hamiltonian systems. Their Hamiltonian function represents an energy that is conserved or dissipated along solutions. Numerical schemes are energy consistent, if the Hamiltonian is preserved or dissipated also…
Monday 6th January 2025 – LJLL : Joyce Ghantous (Inria Bordeaux)
Title: Curved meshes for a diffusion problem with a surface Laplacian Abstract We study a diffusion problem with boundary conditions that involve a surface Laplacian. We present the numerical analysis of a high-order finite element discretization. A smooth domain is considered for the definition of this boundary operator. The discrtized…
Thursday 19th December 2024 – LJLL : Zhao Junming (Harbin Institute of Technology, China)
Title: Photon tunneling heat transfer in particulate system: physical characteristics and homogenization theory Abstract Radiative transfer equation (RTE) is the commonly accepted continuum scale governing equation for radiative heat transfer in particulate system. However, its applicability is questionable for non-random, densely and regularly packed particulate systems, due to dependent scattering…
Monday 2nd June 2025 – LJLL : Theron Guo (Massachussetts Institute of Technology)
Title: TBD Abstract TBD
Monday 19th May 2025 – Visio : Stefan Volkwein (Universität Konstanz)
Title: Adjoint-Based Calibration of Nonlinear Stochastic Differential Equation Abstract To study the nonlinear properties of complex natural phenomena, the evolution of the quantity of interest can be often represented by systems of coupled nonlinear stochastic differential equations (SDEs). These SDEs typically contain several parameters which have to be chosen carefully…
Monday 7th April 2025 – LJLL : Virginie Ehrlacher (Ecole Nationale des Ponts et Chaussées)
Title: Global space-time low-complexity numerical methods for the time-dependent Schrödinger equation Abstract The aim of this talk is to present novel global space-time methods for the approximation of the time-dependent Schrödinger equation on low-complexity manifolds. The backbone of the approach is the use of a least-square formulation of the time-dependent…
Monday 17th March 2025 – INRIA : Fabien Vergnet (Sorbonne Université)
Title: An immersed boundary method based on the resolution of an optimal control problem Abstract The numerical resolution of partial differential equations in domains with an intricate, a priori unknown or deforming over time geometry, generally induce difficulties related to mesh generation. Indeed, solving such problems requires, classically, the generation…
Monday 3rd March 2025 – LJLL : Claire Boyer (Université Paris-Saclay)
Title: A primer on physics-informed machine learning Abstract Physics-informed machine learning combines the expressiveness of data-based approaches with the interpretability of physical models. In this context, we consider a general regression problem where the empirical risk is regularized by a partial differential equation that quantifies the physical inconsistency. Practitioners often…
Monday 3rd February 2025 – LJLL : Maha Daoud (ENSTA Paris)
Title: A class of parabolic fractional reaction-diffusion systems with control of total mass: Theory and numerics Abstract: In this talk based on [1, 2], we present some new results about global-in-time existence of strong solutions to a class of fractional parabolic reaction–diffusion systems posed in a bounded open subset of…
Monday 20th January 2025 – Visio : Tabea Tscherpel (TU Darmstadt)
Title: Energy consistent time discretisation of port-Hamiltonian systems Abstract Various ordinary and partial differential equations arising from physics can be written as port-Hamiltonian systems. Their Hamiltonian function represents an energy that is conserved or dissipated along solutions. Numerical schemes are energy consistent, if the Hamiltonian is preserved or dissipated also…
Monday 6th January 2025 – LJLL : Joyce Ghantous (Inria Bordeaux)
Title: Curved meshes for a diffusion problem with a surface Laplacian Abstract We study a diffusion problem with boundary conditions that involve a surface Laplacian. We present the numerical analysis of a high-order finite element discretization. A smooth domain is considered for the definition of this boundary operator. The discrtized…
Thursday 19th December 2024 – LJLL : Zhao Junming (Harbin Institute of Technology, China)
Title: Photon tunneling heat transfer in particulate system: physical characteristics and homogenization theory Abstract Radiative transfer equation (RTE) is the commonly accepted continuum scale governing equation for radiative heat transfer in particulate system. However, its applicability is questionable for non-random, densely and regularly packed particulate systems, due to dependent scattering…
