Results 21 to 30 of about 257,540 (280)

Wavelets and their use [PDF]

open access: yes, 2001
This review paper is intended to give a useful guide for those who want to apply discrete wavelets in their practice. The notion of wavelets and their use in practical computing and various applications are briefly described, but rigorous proofs of ...
Dremin, I. M.   +2 more
core   +2 more sources

Conception of Voltage Interruption Signal using Continuous Wavelet, Discrete Wavelet, and Wavelet Packet Analysis [PDF]

open access: yesE3S Web of Conferences
This paper focuses on conception of voltage interruption signal in different domains. According to IEEE Standard 1159, Interruption is categorised under short-duration voltage variations in the description of classification of ‘Power quality Disturbances’
Priyadarshini M. S.   +3 more
doaj   +1 more source

Variational Approach in Wavelet Framework to Polynomial Approximations of Nonlinear Accelerator Problems [PDF]

open access: yes, 1998
In this paper we present applications of methods from wavelet analysis to polynomial approximations for a number of accelerator physics problems. According to variational approach in the general case we have the solution as a multiresolution (multiscales)
Fedorova, Antonina N.   +2 more
core   +4 more sources

Application of Shannon Wavelet Entropy and Shannon Wavelet Packet Entropy in Analysis of Power System Transient Signals

open access: yesEntropy, 2016
In a power system, the analysis of transient signals is the theoretical basis of fault diagnosis and transient protection theory. Shannon wavelet entropy (SWE) and Shannon wavelet packet entropy (SWPE) are powerful mathematics tools for transient signal ...
Jikai Chen   +3 more
doaj   +1 more source

Wavelet transforms and their applications to MHD and plasma turbulence: a review

open access: yes, 2015
Wavelet analysis and compression tools are reviewed and different applications to study MHD and plasma turbulence are presented. We introduce the continuous and the orthogonal wavelet transform and detail several statistical diagnostics based on the ...
Farge, Marie, Schneider, Kai
core   +3 more sources

WaveConstLib: A java library for signal analysis and wavelet construction

open access: yesSoftwareX
Wavelet theory (WT) is essential for analyzing non-stationary signals, particularly in real-world applications requiring time-frequency analysis. A key challenge is to identify the optimal wavelet function that matches signal characteristics, enabling ...
Çağla Sarvan Cibil, Nalan Özkurt
doaj   +1 more source

A wavelet selection scheme in underwater discharge signal analysis

open access: yesEURASIP Journal on Advances in Signal Processing, 2023
The analysis of underwater discharge signals is of great significance for its application. Wavelet-based de-noising and analysis technology is an effective means to study underwater discharge signals.
Xiaobing Zhang, Binjie Lu, Liang Qiao
doaj   +1 more source

Nonhomogeneous Wavelet Systems in High Dimensions [PDF]

open access: yes, 2010
It is of interest to study a wavelet system with a minimum number of generators. It has been showed by X. Dai, D. R. Larson, and D. M. Speegle in [11] that for any $d\times d$ real-valued expansive matrix M, a homogeneous orthonormal M-wavelet basis can ...
Han, Bin
core  

Poisson inverse problems [PDF]

open access: yes, 2006
In this paper we focus on nonparametric estimators in inverse problems for Poisson processes involving the use of wavelet decompositions. Adopting an adaptive wavelet Galerkin discretization, we find that our method combines the well-known theoretical ...
Antoniadis, Anestis, Bigot, Jéremie
core   +5 more sources

Molecular bases of circadian magnesium rhythms across eukaryotes

open access: yesFEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

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