Publications associées à Formulation implicite ou explicite d'un problème de dynamique

CPGD: Cadzow Plug-and-Play Gradient Descent for Generalised FRI

Martin Vetterli, Paul Hurley, Matthieu Martin Jean-André Simeoni, Adrien Georges Jean Besson

Finite rate of innovation (FRI) is a powerful reconstruction framework enabling the recovery of sparse Dirac streams from uniform low-pass filtered samples. An extension of this framework, called generalised FRI (genFRI), has been recently proposed for han ...

2020

Forward-Backward Splitting for Optimal Transport Based Problems

Pascal Frossard, Guillermo Ortiz Jimenez, Mireille El Gheche, Hermina Petric Maretic, Effrosyni Simou

Optimal transport aims to estimate a transportation plan that minimizes a displacement cost. This is realized by optimizing the scalar product between the sought plan and the given cost, over the space of doubly stochastic matrices. When the entropy regula ...

2020

MATHICSE technical Report : Stabilized explicit multirate methods for stiff differential equations

Assyr Abdulle, Giacomo Rosilho De Souza

Stabilized Runge–Kutta (aka Chebyshev) methods are especially efficient for the numerical solution of large systems of stiff differential equations because they are fully explicit; hence, they are inherently parallel and easily accommodate nonlinearity. Fo ...

MATHICSE2020

Lattice formulation of axion inflation. Application to preheating

Daniel Garcia Figueroa, José Roberto Canivete Cuissa

We present a lattice formulation of an interaction phi/Lambda F (F) over tilde between an axion and some U(1) gauge sector with the following properties: it reproduces the continuum theory up to O(dx(mu)(2)) corrections, it preserves exact gauge invariance ...

IOP PUBLISHING LTD2019

Synthetic electronic video containing a hidden image

Sabine Süsstrunk, Roger Hersch, Mahmut Sami Arpa

We present a method for hiding images in synthetic videos and reveal them by temporal averaging. We developed a visual masking method that hides the input image both spatially and temporally. Our masking approach consists of temporal and spatial pixel by p ...

2019

Biomembrane modeling with isogeometric analysis

Alfio Quarteroni, Andrea Bartezzaghi

We consider the numerical approximation of lipid biomembranes at equilibrium described by the Canham-Helfrich model, according to which the bending energy is minimized under area and volume constraints. Energy minimization is performed via L-2-gradient flo ...

ELSEVIER SCIENCE SA2019

Waves at a fluid-solid interface: Explicit versus implicit formulation of boundary conditions using a discontinuous Galerkin method

Jan Sickmann Hesthaven, Khemraj Shukla

An accurate solution of the wave equation at a fluid-solid interface requires a correct implementation of the boundary condition. Boundary conditions at acousto-elastic interface require continuity of the normal component of particle velocity and traction, ...

2019

Numerical Homogenization And Model Order Reduction For Multiscale Inverse Problems

Assyr Abdulle, Andrea Di Blasio

A new numerical method based on numerical homogenization and model order reduction is introduced for the solution of multiscale inverse problems. We consider a class of elliptic problems with highly oscillatory tensors that varies on a microscopic scale. W ...

SIAM PUBLICATIONS2019

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Formulation implicite ou explicite d'un problème de dynamique

CPGD: Cadzow Plug-and-Play Gradient Descent for Generalised FRI

Forward-Backward Splitting for Optimal Transport Based Problems

An adaptive algorithm for the transport equation with time dependent velocity

MATHICSE technical Report : Stabilized explicit multirate methods for stiff differential equations

Lattice formulation of axion inflation. Application to preheating

Synthetic electronic video containing a hidden image

Efficient geometric integrators for nonadiabatic quantum dynamics. I. The adiabatic representation

Biomembrane modeling with isogeometric analysis

Waves at a fluid-solid interface: Explicit versus implicit formulation of boundary conditions using a discontinuous Galerkin method

Numerical Homogenization And Model Order Reduction For Multiscale Inverse Problems

Graph Chatbot

Chattez avec Graph Search

Forward-Backward Splitting for Optimal Transport Based Problems

Waves at a fluid-solid interface: Explicit versus implicit formulation of boundary conditions using a discontinuous Galerkin method

An adaptive algorithm for the transport equation with time dependent velocity

Lattice formulation of axion inflation. Application to preheating

Efficient geometric integrators for nonadiabatic quantum dynamics. I. The adiabatic representation

CPGD: Cadzow Plug-and-Play Gradient Descent for Generalised FRI

Synthetic electronic video containing a hidden image

MATHICSE technical Report : Stabilized explicit multirate methods for stiff differential equations

Biomembrane modeling with isogeometric analysis

Numerical Homogenization And Model Order Reduction For Multiscale Inverse Problems