Results 311 to 320 of about 4,035,775 (371)

Entropy solutions for nonlinear anisotropic elliptic equations with variable exponents and degenerate coercivity

Complex Variables and Elliptic Equations, 2020
This article is devoted to the study of a class of nonlinear anisotropic elliptic equations with degenerate coercivity, lower order term and datum in appropriate anisotropic variable exponent Sobolev space.
Hocine Ayadi, F. Mokhtari
semanticscholar   +1 more source

Speckle reducing anisotropic diffusion

IEEE Transactions on Image Processing, 2002
Yongjian Yu, S. Acton
semanticscholar   +3 more sources

Anisotropic fractional diffusion equation

Physica A: Statistical Mechanics and its Applications, 2005
Abstract We analyze an anisotropic fractional diffusion equation that extends some known diffusion equations by considering a diffusion coefficient with spatial and time dependence, the presence of external forces and time fractional derivatives.
G.A. Mendes, E.K. Lenzi, R.S. Mendes, L.R. da Silva   +3 more
openaire   +1 more source

The anisotropic migrator's equation

SEG Technical Program Expanded Abstracts 1989, 1989
Consider a scalar travel t,ime field, constructed by assigning to each point in space, the time at which a wave front passes. The gradient of this scalar field is called the s[ownesa. It has the units of reciprocal velocity and the direction of most rapid increase in the travel time field. Phase velocity is defined as the reciprocal of slowness.
N. F. Uren, G. H. F. Gardner, J. A. McDonald   +2 more
openaire   +1 more source

Parallel Multigrid for Anisotropic Elliptic Equations

Journal of Parallel and Distributed Computing, 2001
Interesting investigations for anisotropy by the cofficients of partial differential equations and by mesh anisotropy, for multigrid with a) alternating plane smoothers combined with standard coarsening and b) plane smoothers with semicoarsening algorithm.
Prieto, M., Santiago, R., Espadas, D., Llorente, I. M., Tirado, F.   +4 more
openaire   +2 more sources

Symmetry results for critical anisotropic p-Laplacian equations in convex cones

Geometric and Functional Analysis, 2019
Given n≥2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$n \ge 2$$\end ...
Giulio Ciraolo, A. Figalli, A. Roncoroni
semanticscholar   +1 more source

Equations of an Elastic Anisotropic Layer

Journal of Applied Mechanics and Technical Physics, 2004
Differential equations of an elastic orthotropic layer are constructed on the basis of expansion of the solutions of the elasticity theory in Legendre polynomials. The order of the system of differential equations is independent of the form of the boundary conditions on the layer surfaces, which allows a correct formulation of conditions on contact ...
Volchkov, Yu. M., Dergileva, L. A.
openaire   +2 more sources

Anisotropic constitutive equations and schur's lemma

International Journal of Engineering Science, 1978
Abstract The symmetry properties of a material impose restrictions on the form of the constitutive expressions employed to describe the response of the material. We employ the methods of group representation theory and Schur's lemma to obtain the general form of the constitutive expression which is consistent with the restrictions imposed by material
Smith, G. F., Kiral, E.
openaire   +1 more source

Eikonal Equation for Anisotropic Media

Journal of Mathematical Sciences, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Hopf Lemma and regularity results for quasilinear anisotropic elliptic equations

Calculus of Variations and Partial Differential Equations, 2018
We consider a class of quasi-linear anisotropic elliptic equations, possibly degenerate or singular, which are of interest in several applications such as computer vision and continuum mechanics.
D. Castorina, G. Riey, B. Sciunzi
semanticscholar   +1 more source