Results 11 to 20 of about 11,514,111 (239)

A note on the polynomial approximation of vertex singularities in the boundary element method in three dimensions [PDF]

open access: yes, 2008
We study polynomial approximations of vertex singularities of the type $r^\lambda |\log r|^\beta$ on three-dimensional surfaces. The analysis focuses on the case when $\lambda > -\frac 12$.
Bespalov, A
core   +7 more sources

Numerical solution of two dimensional harmonic boundary problems containing singularities by conformal transformation methods [PDF]

open access: yes, 1971
Numerical solutions to a class of two dimensional harmonic mixed boundary value problems defined on rectangular domains and containing singularities are obtained using conformal transformation methods.
Whiteman, J R, Papamichael, N
core   +6 more sources

The numerical solution of elliptic and parabolic partial differential equations with boundary singularities [PDF]

open access: yes, 1976
A general numerical method is described for the solution of linear elliptic and parabolic partial differential equations in the presence of boundary singularities.
Furzeland, RM, Crank, J
core   +6 more sources

Polarization singularities in isotropic random vector waves [PDF]

open access: yes, 2001
Following Nye & Hajnal, we explore the geometry of complex vector waves by regarding them as a field of polarization ellipses. Singularities of this field are the C lines and L lines, where the polarization is purely circular and purely linear ...
Dennis, MR   +5 more
core   +1 more source

Tjurina and Milnor numbers of matrix singularities [PDF]

open access: yes, 2005
To gain understanding of the deformations of determinants and Pfaffians resulting from deformations of matrices, the deformation theory of composites f ◦ F with isolated singularities is studied, where f : Y −→C is a function with (possibly non-isolated)
Mond, D. (David), Goryunov, Victor V.
core   +1 more source

(Revised) The numerical solution of elliptic and parabolic partial differential equations with boundary singularities [PDF]

open access: yes, 1977
A general numerical method is described for the solution of linear elliptic and parabolic partial differential equations in the presence of boundary singularities.
Furzeland, RM, Crank, J
core   +5 more sources

Wavelets and partial differential equations for image denoising

open access: yesELCVIA Electronic Letters on Computer Vision and Image Analysis, 2007
In this paper a wavelet based model for image de-noising is presented. Wavelet coefficients are modelled as waves that grow while dilating along scales.
Vittoria Bruni   +2 more
doaj   +1 more source

The Effect of Images on Surface Potential and Resistance Calculation of Grounding Systems

open access: yesAdvances in Electrical and Computer Engineering, 2015
In the grounding systems with a two layers soil, the calculation of the surface potential using the image method is sometimes impossible due to singularities, avoiding researchers to use the method for electrodes in the bottom layer.
MARTINS, A., MARIANO, S., CALADO, M.
doaj   +1 more source

Ergosphere and shadow of a rotating regular black hole

open access: yesNuclear Physics B, 2020
The spacetime singularities in classical general relativity predicted by the celebrated singularity theorems are formed at the end of gravitational collapse.
Sushant G. Ghosh   +2 more
doaj   +1 more source

A Fast and Efficient Topological Coding Algorithm for Compound Images

open access: yesEURASIP Journal on Advances in Signal Processing, 2003
We present a fast and efficient coding algorithm for compound images. Unlike popular mixture raster content (MRC) based approaches, we propose to attack compound image coding problem from the perspective of modeling location uncertainty of image ...
Xin Li
doaj   +1 more source

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