Results 81 to 90 of about 489,037 (244)

An Efficient Technique for Classification of Electrocardiogram Signals

open access: yesAdvances in Electrical and Computer Engineering, 2009
This work describes a Radial Basis Function (RBF) neural network method used to analyze ECG signals for diagnosing cardiac arrhythmias effectively. The proposed method can accurately classify and differentiate normal (Normal) and abnormal heartbeats ...
EBRAHIMZADEH, A., KHAZAEE, A.
doaj   +1 more source

A mathematical model for file fragment diffusion and a neural predictor to manage priority queues over BitTorrent

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2016
BitTorrent splits the files that are shared on a P2P network into fragments and then spreads these by giving the highest priority to the rarest fragment.
Napoli Christian   +2 more
doaj   +1 more source

The Adequateness of Wavelet Based Model for Time Series

open access: yes, 2013
In general, time series is modeled as summation of known information i.e. historical information components, and unknown information i.e. random component. In wavelet based model, time series is represented as linear model of wavelet coecients. Wavelet
Rosadi, Dedi   +3 more
core  

Wavelet Kernels on a DSP: A Comparison between Lifting and Filter Banks for Image Coding

open access: yesEURASIP Journal on Advances in Signal Processing, 2002
We develop wavelet engines on a digital signal processors (DSP) platform, the target application being image and intraframe video compression by means of the forthcoming JPEG2000 and Motion-JPEG2000 standards.
Gnavi Stefano   +4 more
doaj   +1 more source

A New Approach of Power System Protection Based on Wavelet Transformation [PDF]

open access: yesJournal of Electrical and Electronics Engineering, 2016
Wavelet transformation has been used in many protection applications such as transmission lines, transformers and generators protection. In the previous researches, the technique of wavelet protection was applied only to protect one element of the power ...
EID Gouda, MOHAMED S. Hasan
doaj  

Groups, Wavelets, and Wavelet Sets

open access: yes, 2003
Wavelet and frames have become a widely used tool in mathematics, physics, and applied science during the last decade. This article gives an overview over some well known results about the continuous and discrete wavelet transforms and groups acting on $\mathbb{R}^n$.
Olafsson, Gestur, Speegle, Darrin
openaire   +2 more sources

Sub-second dynamics of theta-gamma coupling in hippocampal CA1

open access: yeseLife, 2019
Oscillatory brain activity reflects different internal brain states including neurons’ excitatory state and synchrony among neurons. However, characterizing these states is complicated by the fact that different oscillations are often coupled, such as ...
Lu Zhang   +3 more
doaj   +1 more source

WAVELETS AND WAVELET FRAMES ON THE 2-SPHERE

open access: yesContemporary Problems in Mathematical Physics, 2006
We review the construction of the continuous wavelet transform (CWT) on the 2-sphere by two methods, the group-theoretical approach and the geometrical method based on conformal invariance. Then we discuss the discretization of the spherical CWT and build associated discrete wavelet frames, first half-continuous ones (only the scale is discretized ...
openaire   +3 more sources

Smeared Lattice Model as a Framework for Order to Disorder Transitions in 2D Systems

open access: yesCrystals, 2018
Order to disorder transitions are important for two-dimensional (2D) objects such as oxide films with cellular porous structure, honeycomb, graphene, Bénard cells in liquid, and artificial systems consisting of colloid particles on a plane.
Nadezhda L. Cherkas, Sergey L. Cherkas
doaj   +1 more source

Wavelets and paracommutators

open access: yesArkiv för Matematik, 1993
Conditions for \(T \in S_ p\), where \[ Tf(x) =\int K(x,y) f(y)dy, \] \(S_ p\) is the Schatten-von Neumann class, are considered. In particular, Janson-Peetre paracommutators in connection with wavelet bases are studied.
openaire   +4 more sources

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