Results 1 to 10 of about 1,170 (90)

Darboux transformation for classical acoustic spectral problem [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 49, Page 3123-3142, 2003., 2002
We study discrete isospectral symmetries for the classical acoustic spectral problem in spatial dimensions one and two, by developing a Darboux (Moutard) transformation formalism for this problem. The procedure follows the steps, similar to those for the
Rudnev, M., Yurov, A. V., Yurova, A. A.
core   +6 more sources

Bifurcation of Gap Solitons in Coupled Mode Equations in $d$ Dimensions [PDF]

open access: yes, 2021
We consider a system of first order coupled mode equations in $\mathbb{R}^d$ describing the envelopes of wavepackets in nonlinear periodic media. Under the assumptions of a spectral gap and a generic assumption on the dispersion relation at the spectral ...
Dohnal, Tomas, Wahlers, Lisa
core   +2 more sources

Perfectly Matched Layer Method for Acoustic Scattering Problem by a Locally Perturbed Line with Impedance Boundary Condition

open access: yesAdvances in Applied Mathematics and Mechanics, 2020
In this paper, we study the two-dimensional Helmholtz scattering problem by a locally perturbed line with impedance boundary condition. Different from the problem with Dirichlet boundary condition, the Green function of the Helmholtz equation with ...
X. Li
semanticscholar   +1 more source

Regular solutions for Landau-Lifschitz equation in a bounded domain

open access: yesDifferential and Integral Equations, 2001
Domain. Gilles Carbou, Pierre Fabrie Mathématiques Appliquées de Bordeaux, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence cedex, France.
G. Carbou, P. Fabrie
semanticscholar   +1 more source

Analytical approximation of time-fractional telegraph equation with Riesz space-fractional derivative

open access: yes, 2020
In this study, fractional reduced differential transform method (FRDTM) is developed to derive a semianalytical solution of fractional partial differential equations which involves Riesz space fractional derivatives.
S. Mohammadian, Y. Mahmoudi, F. D. Saei
semanticscholar   +1 more source

Analytical results for 2-D non-rectilinear waveguides based on the Green's function [PDF]

open access: yes, 2007
We consider the problem of wave propagation for a 2-D rectilinear optical waveguide which presents some perturbation. We construct a mathematical framework to study such a problem and prove the existence of a solution for the case of small imperfections.
Ciraolo, Giulio, Magnanini, Rolando
core   +1 more source

Non relativistic strings may be approximated by relativistic strings [PDF]

open access: yes, 2005
We show that bounded families of global classical relativistic strings that can be written as graphs are relatively compact in C0 topology, but their accumulation points include many non relativistic strings. We also provide an alternative formulation of
Brenier, Yann
core   +4 more sources

Asymptotic behaviour of the inductance coefficient for thin conductors [PDF]

open access: yes, 2002
We study the asymptotic behaviour of the inductance coefficient for a thin toroidal inductor whose thickness depends on a small parameter $\eps>0$.
Amirat, Youcef, Touzani, Rachid
core   +3 more sources

Computational Optimal Design of Random Rough Surfaces in Thin-Film Solar Cells

open access: yesCommunications in Computational Physics, 2019
Random rough textures can increase the absorbing efficiency of solar cells by trapping the optical light and increasing the optical path of photons. In this paper, we are concerned with optimal design of random rough surfaces in thin-film solar cells. We
G. Bao, Yanzhao Cao, Junshan Lin, H. Wyk
semanticscholar   +1 more source

On the weak solutions of the forward problem in EEG

open access: yesJournal of Applied Mathematics, Volume 2003, Issue 12, Page 647-656, 2003., 2003
The process underlying the generation of the EEG signals can be described as a set of current sources within the brain. The potential distribution produced by these sources can be measured on the scalp and inside the brain by means of an EEG recorder.
M. I. Troparevsky, D. Rubio
wiley   +1 more source

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