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  • Videos (159)
    Approche macroscopique de la diffusion dans le modèle des miroirs
    22:45
    published on May 22, 2016

    Approche macroscopique de la diffusion dans le modèle des miroirs

    By Yann Chiffaudel

    IHES

    Dans la littérature mathématique, le mot diffusion fait référence à plusieurs définitions différentes. Je m'intéresse à la diffusion dite "macroscopique" caractérisée par l'existence d'une densité de particules évoluant selon la loi de Fick. Je porterai mon attention sur le modèle des ...

    Appears in collection : Les probabilités de demain 2016

    Missing fields : cross

    Score: 11.077534
    Strongly coupled data assimilation with a toy model
    25:24
    published on December 19, 2019

    Strongly coupled data assimilation with a toy model

    By Avneet Singh

    IHP

    Appears in collection : Big data, data assimilation, and uncertainty quantification

    Missing fields : cross diffusion

    Score: 10.826576
    Model assessment, selection and averaging
    published on October 31, 2018

    Model assessment, selection and averaging

    By Aki Vehtari

    CIRM

    The tutorial covers cross-validation, and projection predictive approaches for model assessment, selection and inference after model selection and Bayesian stacking for model averaging. The talk is accompanied with R notebooks using rstanarm, bayesplot, loo, and projpred packages.

    Appears in collection : Jean-Morlet chair: Masterclass in Bayesian statistics / Chaire Jean-Morlet : École de statistique bayésienne

    Missing fields : diffusion

    Score: 10.809397
    Introduction on inverse problems : Three approaches (part 2/2)
    published on November 9, 2020

    Introduction on inverse problems : Three approaches (part 2/2)

    By Michel Cristofol

    CIMPA

    The goal of this course is to give a short survey on the domain of Inverse Problems. After a general introduction I will focus on the parabolic operators and I will present around the same toy problem different technics: - the Dirichlet to Neumann methodology (see [1]), - the Carleman ...

    Appears in collection : Michel Cristofol: Introduction on inverse problems

    Missing fields : cross diffusion

    Score: 10.390461
    Nonlinear free energy diminishing schemes for convection-diffusion equations: convergence and long time behaviour
    published on May 28, 2019

    Nonlinear free energy diminishing schemes for convection-diffusion equations: convergence and long time behaviour

    By Claire Chainais-Hillairet

    CIRM

    The aim of the talk is to introduce a nonlinear Discrete Duality Finite Volume scheme to approximate the solutions of drift-diffusion equations. The scheme is built to preserve at the discrete level even on severely distorted meshes the energy / energy dissipation relation. This relation is of ...

    Appears in collection : POEMs - POlytopal Element Methods in Mathematics and Engineering

    Missing fields : cross

    Score: 10.18723
    ​Diffusion limit for a slow-fast standard map
    published on November 8, 2018

    Diffusion limit for a slow-fast standard map

    By Jacopo De Simoi

    CIRM

    ​Consider the map $(x, z) \mapsto (x + \epsilon^{-\alpha} \sin (2\pi x) + \epsilon^{-(1+\alpha)}z, z + \epsilon \sin(2\pi x))$, which is conjugate to the Chirikov standard map with a large parameter. For suitable $\alpha$, we obtain a central limit theorem for the slow variable $z$ for a ...

    Appears in collection : Probabilistic limit theorems for dynamical systems / Théorèmes limites probabilistes pour les systèmes dynamiques

    Missing fields : cross

    Score: 10.161671
    Internal diffusion-limited aggregation with random starting points
    40:47
    published on June 8, 2017

    Internal diffusion-limited aggregation with random starting points

    By Gady Kozma

    CIRM

    We consider a model for a growing subset of a euclidean lattice (an "aggregate") where at each step one choose a random point from the existing aggregate, starts a random walk from that point, and adds the point of exit to the aggregate. We show that the limiting shape is a ball. Joint work with ...

    Appears in collection : Random walks with memory / Marches aléatoires à mémoire

    Missing fields : cross

    Score: 10.161671
    De Newton à Boltzmann et Einstein : validation des modèles cinétiques et de diffusion [d'après T. Bodineau, I. Gallagher, L. Saint-Raymond, B. Texier]
    01:15:53
    published on March 31, 2014

    De Newton à Boltzmann et Einstein : validation des modèles cinétiques et de diffusion [d'après T. Bodineau, I. Gallagher, L. Saint-Raymond, B. Texier]

    By François Golse

    IHP

    De Newton à Boltzmann et Einstein : validation des modèles cinétiques et de diffusion [d'après T. Bodineau, I. Gallagher, L. Saint-Raymond, B. Texier] ...

    Appears in collection : Bourbaki - 29 mars 2014

    Missing fields : cross

    Score: 9.976665
  • Collections (8)
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