Results 11 to 20 of about 2,288,990 (250)
Equations for nonlinear diffusion [PDF]
Lietuvos Matematikos Rinkinys, 2010 The diffusion is the result of Brownian movement and occurs with a finite velocity. We presented the nonlinear diffusion equation, with diffusion coefficient directly proportional to the impurities concentration.
Arvydas Juozapas Janavičius
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Hybrid Lattice Boltzmann Model for Nonlinear Diffusion and Image Denoising
Mathematics, 2023 In the present paper, a novel approach for image denoising based on the numerical solution to the nonlinear diffusion equation is proposed. The Perona–Malik-type equation is solved by employing a hybrid lattice Boltzmann model with five discrete ...
Oleg Ilyin
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SRP‐AKAZE: an improved accelerated KAZE algorithm based on sparse random projection
IET Computer Vision, 2020 The AKAZE algorithm is a typical image registration algorithm that has the advantage of high computational efficiency based on non‐linear diffusion.
Dan Li +3 more
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Nonlinear Horizontal Diffusion for GCMs [PDF]
, 2007 The mixing-length-based parameterization of horizontal diffusion, which was originally proposed by Smagorinsky, is revisited. The complete tendencies of horizontal momentum diffusion, the associated frictional heating, and horizontal diffusion of ...
Becker, Erich, Burkhardt, Ulrike
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Artifact Suppressed Nonlinear Diffusion Filtering for Low-Dose CT Image Processing
IEEE Access, 2019 Computed tomography (CT) images with a low-dose protocol generally have severe mottle noise and streak artifacts. In this paper, we propose a novel diffusion method named “artifact suppressed nonlinear diffusion filtering (ASNDF),” to ...
Yi Liu +4 more
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Finite element approximation of a nonlinear cross-diffusion population model [PDF]
, 2003 We consider a fully discrete finite element approximation of the nonlinear cross-diffusion population model: Find u i, the population of the ith species, i = 1 and 2, such that ∂ui ∂t −Δ [ ci ui + ai u2i + ui uj] − bi ∇.
John W. Barrett +6 more
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Globally optimal parameter estimates for nonlinear diffusions [PDF]
, 2010 This paper studies an approximation method for the log-likelihood function of a nonlinear diffusion process using the bridge of the diffusion. The main result (Theorem 1) shows that this approximation converges uniformly to the unknown likelihood ...
Mijatović, Aleksandar +3 more
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Surface diffusion: defining a new critical effective radius for holes in thin films [PDF]
, 2022 We explore a specific small geometry containing a single thin bounded grain on a substrate with a hole at its center. By employing a mathematical model based on surface diffusion, no flux boundary conditions, and prescribed contact angles, we study the ...
Novick-Cohen, Amy, Zigelman, Anna
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A local projection stabilization finite element method with nonlinear crosswind diffusion for convection-diffusion-reaction equations [PDF]
, 2013 An extension of the local projection stabilization (LPS) finite element method for convection-diffusion-reaction equations is presented and analyzed, both in the steadystate and the transient setting.
Volker, John +2 more
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Mathematics, 2022 This work provides an analytical approach to characterize and determine solutions to a porous medium system of equations with views in applications to invasive-invaded biological dynamics.
José Luis Díaz Palencia +3 more
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