Results 41 to 50 of about 4,382,513 (303)

Eigendecomposition‐based convergence analysis of the Neumann series for laminated composites and discretization error estimation

open access: yesInternational Journal for Numerical Methods in Engineering, 2019
In computational homogenization for periodic composites, the Lippmann‐Schwinger integral equation constitutes a convenient formulation to devise numerical methods to compute local fields and their macroscopic responses.
C. Bellis, H. Moulinec, P. Suquet
semanticscholar   +1 more source

ICO, un indice de la consistance ordinale d’une série statistique [PDF]

open access: yesTutorials in Quantitative Methods for Psychology
Une série numérique générée à partir d’un processus séquentiel montre-t-elle une tendance identifiable (monotonicité partielle ou complète), un désordre excessif, ou une simple variance d’erreur?
Laurencelle, Louis
doaj   +1 more source

Discrete Fourier–Neumann series

open access: yesJournal of Approximation Theory, 2004
Let Jμ denote the Bessel function of order μ. The system A formula is presented. with n = 0, 1,..., α> - 1, and where ps denotes the sth positive zero of Jα (ax), is orthonormal in l2 (ℕ). In this paper, we study the mean convergence of the Fourier series with respect to this system. Also, we describe the space in which the span of the system is dense.
openaire   +3 more sources

A new biased estimation method based on Neumann series for solving ill-posed problems

open access: yesInternational Journal of Advanced Robotic Systems, 2019
The ill-posed least squares problems often arise in many engineering applications such as machine learning, intelligent navigation algorithms, surveying and mapping adjustment model, and linear regression model.
QW Yang
doaj   +1 more source

A Neumann series of Bessel functions representation for solutions of perturbed Bessel equations [PDF]

open access: yes, 2016
A new representation for a regular solution of the perturbed Bessel equation of the form Lu=-u″+l(l+1)x2+q(x)u=ω2u $ Lu=-u^{\prime \prime }+\left( \frac{l(l+1)}{x^{2}}+q(x)\right) u=\omega ^{2}u $ is obtained.
V. Kravchenko   +2 more
semanticscholar   +1 more source

WKB Approximation to the Power Wall [PDF]

open access: yes, 2013
We present a semiclassical analysis of the quantum propagator of a particle confined on one side by a steeply, monotonically rising potential. The models studied in detail have potentials proportional to $x^{\alpha}$ for $x>0$; the limit $\alpha\to\infty$
Bouas, J. D.   +3 more
core   +1 more source

A Jentzsch-Theorem for Kapteyn, Neumann and General Dirichlet Series [PDF]

open access: yesComputational Methods and Function Theory, 2022
AbstractComparing phase plots of truncated series solutions of Kepler’s equation by Lagrange’s power series with those by Bessel’s Kapteyn series strongly suggests that a Jentzsch-type theorem holds true not only for the former but also for the latter series: each point of the boundary of the domain of convergence in the complex plane is a cluster ...
openaire   +2 more sources

On the series solutions of integral equations in scattering

open access: yesComptes Rendus. Mathématique
We study the validity of the Neumann or Born series approach in solving the Helmholtz equation and coefficient identification in related inverse scattering problems.
Triki, Faouzi, Karamehmedović, Mirza
doaj   +1 more source

Isospectral domains with mixed boundary conditions

open access: yes, 2006
We construct a series of examples of planar isospectral domains with mixed Dirichlet-Neumann boundary conditions. This is a modification of a classical problem proposed by M. Kac.Comment: 9 figures.
Brooks R   +13 more
core   +2 more sources

Extension of Mathieu series and alternating Mathieu series involving the Neumann function $$Y_\nu $$

open access: yesPeriodica Mathematica Hungarica, 2022
AbstractThe main objective of this paper is to present a new extension of the familiar Mathieu series and the alternating Mathieu series S(r) and $${{\widetilde{S}}}(r)$$ S ~ ( r
Parmar, Rakesh K.   +2 more
openaire   +1 more source

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