Results 81 to 90 of about 6,448 (221)

Image Compression using Haar and Modified Haar Wavelet Transform

Tikrit Journal of Engineering Sciences, 2013
Efficient image compression approaches can provide the best solutions to the recent growth of the data intensive and multimedia based applications. As presented in many papers the Haar matrix–based methods and wavelet analysis can be used in various ...
Mohannad Abid Shehab Ahmed, Haithem Taha, Musab Tahseen Salah Aldeen   +2 more
doaj  

Mixed Problem for Partial Differential Equation of Large Time Variable Order

Journal of Optimization, Differential Equations and Their Applications
An algorithm for solving a class of linear variable order fractional partial differential equations (FPDEs) is presented in this paper. We utilized a combination of Caputo fractional derivatives with the Haar wavelet collocation method (HWCM) and Eiler ...
Yaroslav M. Drin, Iryna I. Drin, Svitlana S. Drin   +2 more
doaj   +1 more source

Using wavelets for time series forecasting: Does it pay off? [PDF]

By means of wavelet transform a time series can be decomposed into a time dependent sum of frequency components. As a result we are able to capture seasonalities with time-varying period and intensity, which nourishes the belief that incorporating the ...
Schlüter, Stephan, Deuschle, Carola
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Parameter estimation of nonlinear circuits using Haar wavelet transform [PDF]

, 2020
There have been proposed several methods to analyze waveforms in transient state and waveforms in steady state of nonlinear circuits using Haar wavelet transforms [1], [2]. Using the Haar wavelet, derivative and integration operation matrices were easily
S, Moro, K, Sakaguchi
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Estimation of Delay Time in Linear Dynamic Systems Using Wavelets [PDF]

المجلة العراقية للعلوم الاحصائية
 This research explores the use of wavelets in estimating delay time in stochastic linear dynamic systems, as delay time plays a crucial role in diagnosing the system by determining the time interval between inputs and outputs.
Reem Taha, Heyam Hayawi, Mohamed Elkhouli   +2 more
doaj   +1 more source

Numerical solution of elliptic partial differential equations by Haar wavelet operational matrix method / Nor Artisham Che Ghani

, 2012
The purpose of this study is to establish a simple numerical method based on the Haar wavelet operational matrix of integration for solving two dimensional elliptic partial differential equations of the form, Ñ2u(x, y) + ku(x, y) = f (x, y) with the ...
Nor Artisham, Che Ghani
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Modelo para previsão de vazão fluvial baseado em wavelets e redes neurais [PDF]

, 2008
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Ciências da ComputaçãoO presente trabalho apresenta um modelo híbrido wavelet/redes neurais, onde é empregada a análise wavelet como ...
Spaeth, Francisco
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Utilization of Haar wavelet collocation technique for fractal-fractional order problem. [PDF]

Heliyon, 2023
Shah K, Amin R, Abdeljawad T.
europepmc   +1 more source

HAAR WAVELET ANALYSIS OF CLIMATIC TIME SERIES

International Journal of Wavelets, Multiresolution and Information Processing, 2014
In order to extract the intrinsic information of climatic time series from background red noise, in this paper, we will first give an analytic formula on the distribution of Haar wavelet power spectra of red noise in a rigorous statistical framework. After that, by comparing the difference of wavelet power spectra of real climatic time series and red ...
Zhang, Zhihua, Moore, John C., Grinsted, Aslak   +2 more
openaire   +2 more sources

Wavelet Multiresolution Analysis of High-Frequency Asian FX Rates, Summer 1997 [PDF]

FX pricing processes are nonstationary and their frequency characteristics are time-dependent. Most do not conform to geometric Brownian motion, since they exhibit a scaling law with a Hurst exponent between zero and 0.5 and fractal dimensions between 1 ...
CORNELIS A. LOS, JEYANTHI KARUPPIAH
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