Results 51 to 60 of about 1,000 (136)

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

open access: yesResults 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   +5 more
doaj   +1 more source

On better approximation order for the max-product Meyer-König and Zeller operator

open access: yesDemonstratio Mathematica
Bede et al. (B. Bede, L. Coroianu, and S. G. Gal, Approximation and shape preserving properties of the nonlinear Meyer-König and Zeller operator of max-product kind, Numer. Funct. Anal. Optim. 31 (2010), no.
Çit Sezin, Doğru Ogün
doaj   +1 more source

Enhanced double random phase encryption of quantum images

open access: yesResults 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   +3 more
doaj   +1 more source

The Lower Estimate for Bernstein Operator [PDF]

open access: yes, 2013
MSC 2010: 41A10, 41A15, 41A25, 41A36For functions belonging to the classes C2[0; 1] and C3[0; 1], we establish the lower estimate with an explicit constant in approximation by Bernstein polynomials in terms of the second order Ditzian-Totik modulus of ...
Gal, Sorin G., Tachev, Gancho T.
core  

Local and global results for modified Sz\'{a}sz - Mirakjan operators

open access: yes, 2016
In this paper, we study a natural modification of Sz\'{a}sz - Mirakjan operators. It is shown by discussing many important established results for Sz\'{a}sz - Mirakjan operators.
null null   +2 more
core   +1 more source

Enhancing the accuracy and efficiency of two uniformly convergent numerical solvers for singularly perturbed parabolic convection–diffusion–reaction problems with two small parameters

open access: yesDemonstratio Mathematica
This study is devoted to designing two hybrid computational algorithms to find approximate solutions for a class of singularly perturbed parabolic convection–diffusion–reaction problems with two small parameters.
Ansari Khursheed J.   +2 more
doaj   +1 more source

Recent improvements in Hurricane Imaging Radiometer’s brightness temperature image reconstruction

open access: yesResults in Physics, 2017
NASA MSFCs airborne Hurricane Imaging Radiometer (HIRAD) uses interferometric aperture synthesis to produce high resolution wide swath images of scene brightness temperature (Tb) distribution at four discrete C-band microwave frequencies (4.0, 5.0, 6.0 ...
Sayak K. Biswas, Daniel J. Cecil
doaj   +1 more source

The Breadth-one $D$-invariant Polynomial Subspace [PDF]

open access: yes, 2014
We demonstrate the equivalence of two classes of $D$-invariant polynomial subspaces introduced in [8] and [9], i.e., these two classes of subspaces are different representations of the breadth-one $D$-invariant subspace.
Jiang, Xue, Zhang, Shugong
core  

Fiber-optic filter fluorometer for emission detection of Protoporphyrin IX and its direct precursors – A preliminary study for improved Photodynamic Therapy applications

open access: yesResults in Physics, 2018
In this work we present first results of a laboratory manufactured filter-fluorometer to study differences in intensity and position of the main peaks of three porphyrins that appear during the Heme-Synthesis. Porphyrins play a major role in Photodynamic
Rainer Landes   +5 more
doaj   +1 more source

Approximation by strongly incomplete polynomials on compact sets

open access: yesConcrete 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   +1 more
doaj   +1 more source

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