Results 1 to 10 of about 39,634 (207)

Solving Nonlinear Boundary Value Problems Using the Higher Order Haar Wavelet Method

open access: yesMathematics, 2021
The current study is focused on development and adaption of the higher order Haar wavelet method for solving nonlinear ordinary differential equations. The proposed approach is implemented on two sample problems—the Riccati and the Liénard equations. The
Mart Ratas, Jüri Majak, Andrus Salupere
doaj   +3 more sources

Solving nonlinear PDEs using the higher order Haar wavelet method on nonuniform and adaptive grids

open access: yesMathematical Modelling and Analysis, 2021
The higher order Haar wavelet method (HOHWM) is used with a nonuniform grid to solve nonlinear partial differential equations numerically. The Burgers’ equation, the Korteweg–de Vries equation, the modified Korteweg–de Vries equation and the sine–Gordon ...
Mart Ratas, Andrus Salupere, Jüri Majak
doaj   +1 more source

A Data-Driven Framework for Small Hydroelectric Plant Prognosis Using Tsfresh and Machine Learning Survival Models

open access: yesSensors, 2022
Maintenance in small hydroelectric plants (SHPs) is essential for securing the expansion of clean energy sources and supplying the energy estimated to be required for the coming years.
Rodrigo Barbosa de Santis   +2 more
doaj   +1 more source

Numerical solutions of higher order boundary value problems via wavelet approach

open access: yesAdvances in Difference Equations, 2021
This paper presents a numerical scheme based on Haar wavelet for the solutions of higher order linear and nonlinear boundary value problems. In nonlinear cases, quasilinearization has been applied to deal with nonlinearity.
Shams Ul Arifeen   +5 more
doaj   +1 more source

Application of higher order Haar wavelet method for solving nonlinear evolution equations

open access: yesMathematical Modelling and Analysis, 2020
The recently introduced higher order Haar wavelet method is treated for solving evolution equations. The wave equation, the Burgers’ equations and the Korteweg-de Vries equation are considered as model problems.
Mart Ratas, Andrus Salupere
doaj   +1 more source

Linear Scaling Solution of the Coulomb problem using wavelets [PDF]

open access: yes, 1997
The Coulomb problem for continuous charge distributions is a central problem in physics. Powerful methods, that scale linearly with system size and that allow us to use different resolutions in different regions of space are therefore highly desirable ...
Arias   +18 more
core   +2 more sources

APPLICATION OF FOURIER TRANSFORM AND WAVELET DECOMPOSITION FOR DECODING THE CONTINUOUS AUTOMATIC LOCOMOTIVE SIGNALING CODE

open access: yesNauka ta progres transportu, 2017
Purpose. The existing system of automatic locomotive signaling (ALS) was developed at the end of the last century. This system uses the principle of a numerical code which is implemented on the basis of relay engineering, and therefore, it is exposed to ...
O. O. Hololobova, V. I. Havrilyuk
doaj   +1 more source

Design of Gm-C wavelet filter for on-line epileptic EEG detection [PDF]

open access: yes, 2019
Copyright © 2019 The Institute of Electronics, Information and Communication EngineersAnalog filter implementation of continuous wavelet transform is considered as a promising technique for on-line spike detection applied in wearable electroencephalogram
He, Yigang   +4 more
core   +2 more sources

Efficient Representation of Head-Related Transfer Functions With Combination of Spherical Harmonics and Spherical Wavelets

open access: yesIEEE Access, 2019
Recently, a modeling method for head-related transfer functions (HRTFs) in the spatial domain is proposed based on spherical wavelets. Because spherical wavelets are local functions on the sphere, HRTF local features can be efficiently represented by ...
Huaping Liu, Yong Fang, Qinghua Huang
doaj   +1 more source

Scattering Calculations with Wavelets [PDF]

open access: yes, 2002
We show that the use of wavelet bases for solving the momentum-space scattering integral equation leads to sparse matrices which can simplify the solution. Wavelet bases are applied to calculate the K-matrix for nucleon-nucleon scattering with the s-wave
Kessler, B. M.   +2 more
core   +2 more sources

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