Results 11 to 20 of about 512,361 (324)

The Lattice Geometry of Walsh-Function-Based Adaptive Optics

open access: yesPhotonics, 2022
We show that there is an intrinsic link between the use of Walsh aberration modes in adaptive optics (AO) and the mathematics of lattices. The discrete and binary nature of these modes means that there are infinite combinations of Walsh mode coefficients
Qi Hu   +4 more
doaj   +1 more source

Binary basic splines in MRA [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2021
$B$-splines were introduced by Carry and Schoenberg. Constructed on a uniform mesh and defined in terms of convolutions, such splines generate a Riesz MRA.
Chumachenko, Sergei A.
doaj   +1 more source

Cross talk in phase-coded holographic memories [PDF]

open access: yes, 1993
The cross talk between holograms multiplexed with Walsh-Hadamard phase codes is analyzed. Each hologram is stored with a reference beam that consists of N phase-coded plane waves. The signal-to-noise ratio (SNR) is calculated for a recording schedule for
Curtis, Kevin, Psaltis, Demetri
core   +1 more source

An upper bound on binomial coefficients in the de Moivre – Laplace form

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2022
We provide an upper bound on binomial coefficients that holds over the entire parameter range an whose form repeats the form of the de Moivre – Laplace approximation of the symmetric binomial distribution.
Sergey V. Agievich
doaj   +1 more source

Matrix Summability of Walsh–Fourier Series

open access: yesMathematics, 2022
The presented paper discusses the matrix summability of the Walsh–Fourier series. In particular, we discuss the convergence of matrix transforms in L1 space and in CW space in terms of modulus of continuity and matrix transform variation.
Ushangi Goginava, Károly Nagy
doaj   +1 more source

Efficient quantum circuits for diagonal unitaries without ancillas

open access: yesNew Journal of Physics, 2014
The accurate evaluation of diagonal unitary operators is often the most resource-intensive element of quantum algorithms such as real-space quantum simulation and Grover search.
Jonathan Welch   +3 more
doaj   +1 more source

Efficient quantum amplitude encoding of polynomial functions [PDF]

open access: yesQuantum
Loading functions into quantum computers represents an essential step in several quantum algorithms, such as quantum partial differential equation solvers.
Javier Gonzalez-Conde   +3 more
doaj   +1 more source

Spectral representation of stochastic integration operators [PDF]

open access: yesMATEC Web of Conferences, 2022
The spectral representation for stochastic integration operators with respect to the Wiener process is proposed in the form of a composition of spectral characteristics used in the spectral form of mathematical description for control systems.
Rybakov Konstantin
doaj   +1 more source

Comparison of two solution algorithms of selected harmonics elimination pulse width modulation with multi-band for multi-level inverter

open access: yesGong-kuang zidonghua, 2014
For lack of research of nonlinear and linear solution algorithms of selected harmonics elimination pulse width modulation used in the same level topology of inverter, a nonlinear solution equation based on homotopy algorithm and a linear solution model ...
PAN Hongying, LI Song
doaj   +1 more source

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