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检索条件"机构=Scientific Computing and Numerical Analysis"
125 条 记 录,以下是81-90 订阅
排序:
Divergence-free tangential finite element methods for incompressible flows on surfaces
arXiv
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arXiv 2019年
作者: Lederer, Philip L. Lehrenfeld, Christoph Schöberl, Joachim Institute for Analysis and Scientific Computing TU Wien Austria Institute for Numerical and Applied Mathematics University of Göttingen Germany
In this work we consider the numerical solution of incompressible flows on two-dimensional manifolds. Whereas the compatibility demands of the velocity and the pressure spaces are known from the flat case one further ... 详细信息
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Stable recovery of entangled weights: Towards robust identification of deep neural networks from minimal samples
arXiv
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arXiv 2021年
作者: Fiedler, Christian Fornasier, Massimo Klock, Timo Rauchensteiner, Michael Intelligent Control Systems Group Max Planck Institute for Intelligent Systems Heisenbergstr. 3 Stuttgart70569 Germany Institute for Data Science in Mechanical Engineering RWTH-Aachen University Dennewartstraße 27 Aachen50868 Germany Department of Mathematics Bolzmannstraße 3 85748 Garching Germany Department of Numerical Analysis and Scientific Computing Simula Research Laboratory Oslo Norway Department of Mathematics University of San Diego California San Diego United States
In this paper we approach the problem of unique and stable identifiability of generic deep artificial neural networks with pyramidal shape and smooth activation functions from a finite number of input-output samples. ... 详细信息
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A polynomial-degree-robust a posteriori error estimator for nédélec discretizations of magnetostatic problems
arXiv
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arXiv 2020年
作者: Gedicke, Joscha Geevers, Sjoerd Perugia, Ilaria Schöberl, Joachim Institute for Numerical Simulation University of Bonn Endenicher Allee 19b Bonn53115 Germany Faculty of Mathematics University of Vienna Oskar-Morgenstern-Platz 1 Vienna1090 Austria Institute for Analysis and Scientific Computing Vienna University of Technology Wiedner Hauptstrasse 8-10 Vienna1040 Austria
We present an equilibration-based a posteriori error estimator for Nédélec element discretizations of the magnetostatic problem. The estimator is obtained by adding a gradient correction to the estimator for... 详细信息
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Twofold saddle-point formulation of biot poroelasticity with stress-dependent diffusion
arXiv
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arXiv 2021年
作者: Gómez-Vargas, Bryan Mardal, Kent-André Ruiz-Baier, Ricardo Vinje, Vegard Sección de Matemática Sede de Occidente Universidad de Costa Rica San Ramón Ala juela Costa Rica Department of Mathematics Division of Mechanics University of Oslo Norway Simula Research Laboratory Lysaker1325 Norway School of Mathematics Monash University 9 Rainforest Walk MelbourneVIC3800 Australia Institute of Computer Science and Mathematical Modelling Sechenov University Moscow Russia Universidad Adventista de Chile Casilla 7-D Chillán Chile Department for Numerical Analysis and Scientific Computing Simula Research Laboratory Lysaker Norway
We introduce a stress/total-pressure formulation for poroelasticity that includes the coupling with steady nonlinear diffusion modified by stress. The nonlinear problem is written in mixed-primal form, coupling a pert... 详细信息
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Feasibility of Acousto-Electric Tomography
arXiv
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arXiv 2019年
作者: Jensen, Bjørn Kirkeby, Adrian Knudsen, Kim Faculty of Information Technology University of Jyväskylä Finland Department of Numerical Analysis and Scientific Computing Simula Research Laboratory Oslo Norway Department of Applied Mathematics and Computer Science Technical University of Denmark Kgs Lyngby Denmark
In acousto-electric tomography the goal is to reconstruct the electric conductivity in a domain from electrostatic boundary measurements of corresponding currents and voltages, while the domain is penetrated by a time... 详细信息
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Parametric sequential method for MRI-based wall shear stress quantification
arXiv
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arXiv 2020年
作者: Shokina, Nina Teschner, Gabriel Bauer, Andreas Tropea, Cameron Egger, Herbert Hennig, Jürgen Krafft, Axel J. Department of Radiology Medical Physics Medical Center University of Freiburg Faculty of Medicine University of Freiburg Freiburg79106 Germany Institute for Numerical Analysis and Scientific Computing Department of Mathematics Technische Universität Darmstadt Darmstadt64293 Germany Institute for Fluid Mechanics and Aerodynamics Department of Mechanical Engineering Technische Universität Darmstadt Darmstadt-Griesheim64347 Germany Department of Radiology Medical Physics Medical Center University of Freiburg Faculty of Medicine University of Freiburg Freiburg79106 Germany
Wall shear stress (WSS) has been suggested as a potential biomarker in various cardiovascular diseases and it can be estimated from phase-contrast Magnetic Resonance Imaging (PC-MRI) velocity measurements. We present ... 详细信息
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Automatic Variationally Stable analysis for Finite Element Computations: Transient Convection-Diffusion Problems
arXiv
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arXiv 2020年
作者: Valseth, Eirik Behnoudfar, Pouria Dawson, Clint Romkes, Albert Oden Institute for Computational Engineering and Sciences University of Texas at Austin AustinTX78712 United States The Department of Data Science The Norwegian University of Life Science Drøbakveien 31 Ås1433 Norway Department of Scientific Computing and Numerical Analysis Simula Research Laboratory Kristian Augusts gate 23 Oslo0164 Norway PerthWA6152 Australia Department of Mechanical Engineering South Dakota School of Mines & Technology Rapid CitySD57701 United States
We present an application of stable finite element (FE) approximations of convection-diffusion initial boundary value problems (IBVPs) using a weighted least squares FE method, the automatic variationally stable finit... 详细信息
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Finite element simulation of ionic electrodiffusion in cellular geometries
arXiv
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arXiv 2019年
作者: Ellingsrud, A.J. Solbrå, A. Einevoll, G.T. Halnes, G. Rognes, M.E. Department for Scientific Computing and Numerical Analysis Simula Research Laboratory Norway Centre for Integrative Neuroplasticity University of Oslo Oslo Norway Department of Physics University of Oslo Oslo Norway Faculty of Science and Technology Norwegian University of Life Sciences Ås Norway
Mathematical models for excitable cells are commonly based on cable theory, which considers a homogenized domain and spatially constant ionic concentrations. Although such models provide valuable insight, the effect o... 详细信息
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Hybrid discontinuous Galerkin methods with relaxed H(DIV)-conformity for incompressible flows. Part II
arXiv
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arXiv 2018年
作者: Lederer, Philip L. Lehrenfeld, Christoph Schöberl, Joachim Institute for Analysis and Scientific Computing TU Wien Austria Institute for Numerical and Applied Mathematics University of Göttingen Germany
The present work is the second part of a pair of papers, considering Hybrid Discontinuous Galerkin methods with relaxed H(div)-conformity. The first part mainly dealt with presenting a robust analysis with respect to ... 详细信息
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Efficient white noise sampling and coupling for multilevel Monte Carlo with non-nested meshes
arXiv
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arXiv 2018年
作者: Croci, Matteo Giles, Michael B. Rognes, Marie E. Farrell, Patrick E. Mathematical Institute University of Oxford Oxford United Kingdom Department for Numerical Analysis and Scientific Computing Simula Research Laboratory P.O. Box 134 Lysaker1325 Norway
When solving stochastic partial differential equations (SPDEs) driven by additive spatial white noise, the efficient sampling of white noise realizations can be challenging. Here, we present a new sampling technique t... 详细信息
来源: 评论