Results 61 to 70 of about 178 (168)

Coupling efficiency of a partially coherent collimating laser from turbulent biological tissue to fiber

Results in Physics, 2019
We propose a model of the fiber coupling efficiency for a partially coherent collimating laser beam propagating through turbulent biological tissue to fiber.
Qiyong Liang, Beibei Hu, Yixin Zhang, Yun Zhu, Shibao Deng, Lin Yu   +5 more
doaj   +1 more source

Superdense unbounded divergence of a class of interpolatory product quadrature formulas: Dedicated to Professor Gheorghe Coman on the occasion of his 80th anniversary [PDF]

, 2016
. The aim of this paper is to highlight the superdense unbounded divergence of a class of product quadrature formulas of interpolatory type on Jacobi nodes, associated to the Banach space of all real continuous functions defined on [-1; 1], and to a ...
MITREA, Alexandru I.
core  

Weighted Weierstrass' theorem with first derivatives [PDF]

, 2007
32 pages, no figures.-- MSC2000 codes: 41A10, 46E35, 46G10.MR#: MR2338656 (2008g:41004)Zbl#: Zbl pre05173014We characterize the set of functions which can be approximated by continuous functions with the norm $\ \ {L infty(w)}$ for every weight w.
Tourís, Eva, Rodríguez, José M., Quintana, Yamilet, Portilla, Ana   +3 more
core   +1 more source

Enhanced double random phase encryption of quantum images

Results in Physics, 2019
We improve the double random phase encryption (DRPE) algorithm to make the outcome of DRPE algorithm as uniformly mixed as possible via applying scrambling transform.
Shiping Du, Daowen Qiu, Paulo Mateus, Jozef Gruska   +3 more
doaj   +1 more source

Weighted Approximation by the Goodman–Sharma-Type Operators [PDF]

, 2012
P. E. Parvanov - The uniform weighted approximation errors of the Goodman–Sharma operators are characterized for functions.Равномерната теглова апроксимация с модифицирани по Гудман–Шарма опера-тори от тип на Бернщайн, Баскаков и Майер–Кьоних–Целер е ...
Първанов, Първан
core  

Approximation by strongly incomplete polynomials on compact sets

Concrete Operators
This note presents a question regarding the relationship between approximation by strongly incomplete polynomials on compact subsets K of C $\mathbb{C}$ and the logarithmic capacity of K.
Charpentier Stéphane, Maronikolakis Konstantinos   +1 more
doaj   +1 more source

Equivalence Between K-functionals Based on Continuous Linear Transforms [PDF]

, 2007
2000 Mathematics Subject Classification: 46B70, 41A10, 41A25, 41A27, 41A35, 41A36, 42A10.The paper presents a method of relating two K-functionals by means of a continuous linear transform of the function.
Draganov, Borislav, Ivanov, Kamen
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Generalized weighted Sobolev spaces and applications to Sobolev orthogonal polynomials, II [PDF]

, 2002
32 pages, no figures.-- MSC1987 codes: 41A10, 46E35, 46G10.-- Part I of this paper published in: Acta Appl. Math. 80(3): 273-308 (2004), available at: http://e-archivo.uc3m.es/handle/10016/6482MR#: MR1928169 (2003h:42034)Zbl#: Zbl 1095.42014^aWe present ...
José M. Rodríguez, Pestana, Domingo, Elena Romera, Romera, Elena, Venancio Alvarez, Rodríguez, José M., Álvarez, Venancio, Domingo Pestana   +7 more
core   +1 more source

A new kind of Durrmeyer-Stancu-type operators

Demonstratio Mathematica
The objective of this study is to examine a class of positive linear operators, defined in terms of the bψ,kλ,μ{b}_{\psi ,k}^{\lambda ,\mu } basis and to analyze their approximation properties. Direct estimates for the (λ,μ)\left(\lambda ,\mu )-Durrmeyer-
Cai Qing-Bo, Güngör Şule Yüksel, Çekim Bayram   +2 more
doaj   +1 more source

(λ, ψ)-Bernstein-Kantorovich operators

Demonstratio Mathematica
In this article, we introduce a new family of (λ,ψ)\left(\lambda ,\psi )-Bernstein-Kantorovich operators which depends on a parameter λ\lambda , derived from the basis functions of Bézier curves and an integrable function ψ\psi .
Aktuğlu Hüseyin, Kara Mustafa, Baytunç Erdem, Fidan Saner   +3 more
doaj   +1 more source