Results 21 to 30 of about 288,603 (325)

Removal of ‘strip noise’ in radio-echo sounding data using combined wavelet and 2-D DFT filtering

open access: yesAnnals of Glaciology, 2020
Radio-echo sounding (RES) can be used to understand ice-sheet processes, englacial flow structures and bed properties, making it one of the most popular tools in glaciological exploration.
Bangbing Wang   +9 more
doaj   +1 more source

A harmonics detection method based on improved comb filter of sliding discrete Fourier for grid-tied inverter

open access: yesEnergy Reports, 2020
Harmonic detection plays an important role in power quality for grid-tied inverters. Among the various methods, sliding discrete Fourier transform (SDFT) based algorithms have found wide and popular applications due to advantages like simplicity and ...
Dongdong Chen   +4 more
doaj   +1 more source

Burst Channel Error Reduction Based on Interleaving for Efficient High-Speed Wireless Communication

open access: yesApplied Sciences, 2022
Recently, the demand for reliable and high-speed wireless communication has rapidly increased. Orthogonal frequency division multiplexing (OFDM) is a modulation scheme that is the newest competitor against other modulation schemes used for this purpose ...
Fatma H. El-Fouly   +5 more
doaj   +1 more source

Replica Fourier Transform: Properties and applications

open access: yesNuclear Physics B, 2015
The Replica Fourier Transform is the generalization of the discrete Fourier Transform to quantities defined on an ultrametric tree. It finds use in conjunction of the replica method used to study thermodynamics properties of disordered systems such as ...
A. Crisanti, C. De Dominicis
doaj   +1 more source

Hybrid semi analytical method for geothermal U shaped heat exchanger

open access: yesCase Studies in Thermal Engineering, 2018
In this paper, convective-conductive heat transfer processes between the all components of geothermal borehole heat exchanger (BHE) such as pipe-in, pipe-out and grout have been studied.
P. Jalili, D.D. Ganji, S.S. Nourazar
doaj   +1 more source

Application of Modelling and Simulation in Durability Tests of Vehicles and Their Components

open access: yesEnergies, 2022
The use of simulation and modelling has been proposed for determining the excitations to be applied in the procedures of laboratory testing of a car’s structural components, without the need to test the complete vehicle.
Zbigniew Lozia
doaj   +1 more source

Co-compact Gabor systems on locally compact abelian groups [PDF]

open access: yes, 2015
In this work we extend classical structure and duality results in Gabor analysis on the euclidean space to the setting of second countable locally compact abelian (LCA) groups.
Jakobsen, Mads Sielemann, Lemvig, Jakob
core   +1 more source

Computing the Kolmogorov-Smirnov Distribution When the Underlying CDF is Purely Discrete, Mixed, or Continuous

open access: yesJournal of Statistical Software, 2020
The distribution of the Kolmogorov-Smirnov (KS) test statistic has been widely studied under the assumption that the underlying theoretical cumulative distribution function (CDF), F (x), is continuous.
Dimitrina S. Dimitrova   +2 more
doaj   +1 more source

Multipartite Nonlocality without Entanglement in Many Dimensions [PDF]

open access: yes, 2006
We present a generic method to construct a product basis exhibiting Nonlocality Without Entanglement with $n$ parties each holding a system of dimension at least $n-1$.
J. Niset, J. S. Bell, N. J. Cerf
core   +2 more sources

Short vector code generation for the discrete Fourier transform [PDF]

open access: yesProceedings International Parallel and Distributed Processing Symposium, 2004
In this paper we use a mathematical approach to automatically generate high performance short vector code for the discrete Fourier transform (DFT). We represent the well-known Cooley-Tukey fast Fourier transform in a mathematical notation and formally derive a "short vector variant".
F. Franchetti, M. Puschel
openaire   +1 more source

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