Results 31 to 40 of about 37,043 (186)
A note on multigrid preconditioning for fractional PDE-constrained optimization problems
Results in Applied Mathematics, 2021 In this note we present a multigrid preconditioning method for solving quadratic optimization problems constrained by a fractional diffusion equation.
Harbir Antil +2 more
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Overlapping Domain Decomposition Method with Cascadic Multigrid for Image Restoration
Mathematics, 2023 In the process of image restoration, it is usually necessary to solve large-scale inverse problems, where the computational cost is very high for large or high-resolution images.
Zhaoteng Chu, Chenliang Li
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Mathematical Modelling and Analysis, 2014 This paper presents a full multigrid (FMG) technique, which combines a multigrid method, an active set algorithm and a nested iteration technique, to solve a linear complementarity problem (LCP) modeling elastic normal contact problems.
Jing Zhao +2 more
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SIAM Journal on Scientific Computing, 1993 Some similarities between multiresolution (wavelet) analysis [see \textit{B. Glowinski}, \textit{W. Lawton}, \textit{M. Ravachol} and \textit{E. Tedenbaum}. Wavelet solution of linear and nonlinear elliptic, parabolic and hyperbolic problems in one space dimension, in computing methods in applied sciences and enginneering, Society for Industrial and ...
Briggs, William L., Henson, Van Emden
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A Geometric Multigrid Method for 3D Magnetotelluric Forward Modeling Using Finite-Element Method
Remote Sensing, 2023 The traditional three-dimensional (3D) magnetotelluric (MT) forward modeling using Krylov subspace algorithms has the problem of low modeling efficiency.
Xianyang Huang +8 more
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h-multigrid agglomeration based solution strategies for discontinuous Galerkin discretizations of incompressible flow problems [PDF]
, 2017 In this work we exploit agglomeration based $h$-multigrid preconditioners to speed-up the iterative solution of discontinuous Galerkin discretizations of the Stokes and Navier-Stokes equations.
Bassi, Francesco +2 more
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Acta Scientiarum: Technology, 2022 In this work, we applied different extrapolation techniques in association with the multigrid method to discover which one is the most effective in reducing the iteration error and the processing time (CPU time), as well as in improving the convergence ...
Bruno Benato Rutyna +4 more
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Neural multigrid for gauge theories and other disordered systems [PDF]
, 1992 We present evidence that multigrid works for wave equations in disordered systems, e.g. in the presence of gauge fields, no matter how strong the disorder, but one needs to introduce a "neural computations" point of view into large scale simulations ...
Baeker, M. +3 more
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Journal of Thermal Science and Technology, 2015 The computational efficiency of different composite schemes for the convection terms of the convection-diffusion equations is systematically studied in this paper.
Jingfa LI +4 more
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Examples and Counterexamples, 2021 In this work, we consider the design of a geometric multigrid method with multiplicative Schwarz smoothers for the eddy-current problem and the time-harmonic Maxwell equations.
Sebastian Kinnewig +2 more
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