Results 31 to 40 of about 11,164,966 (156)

A Haar wavelet-based method for solving nonlinear variable-order fractional integro-differential equations [PDF]

AIP Advances
This paper presents an efficient numerical approach for solving nonlinear variable-order fractional integro-differential equations. The proposed method combines the Haar wavelet collocation method with the Caputo fractional derivative to obtain accurate ...
Zoreh Moradi, Omid Nikan, Hamid Mesgarani   +2 more
doaj   +1 more source

Wavelet covariance approach to measure convective boundary‐layer structure

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study introduces a wavelet‐based framework that applies the Haar discrete wavelet transform (DWT) to radiosonde profiles of potential temperature and water vapor mixing ratio for diagnosing convective boundary‐layer (CBL) structure. The method objectively identifies key CBL parameters, including the surface‐layer height, entrainment zone depth ...
Song‐Lak Kang, Cho‐Rong Choi, Jung‐Hee Ryu   +2 more
wiley   +1 more source

Comments on "phase-shifting for nonseparable 2-D haar wavelets" [PDF]

, 2009
In their recent paper, Alnasser and Foroosh derive a wavelet-domain (in-band) method for phase-shifting of 2-D "nonseparable" Haar transform coefficients. Their approach is parametrical to the (a priori known) image translation.
Andreopoulos, Y
core  

Haar wavelet method for solution of distributed order time-fractional differential equations

Alexandria Engineering Journal, 2021
This manuscript is related to compute approximate solutions for a class of fractional distributed order differential equations (FDODEs). The corresponding derivative of fractional order is taken in Caputo sense.
Rohul Amin, B. Alshahrani, Mona Mahmoud, Abdel-Haleem Abdel-Aty, Kamal Shah, Wejdan Deebani   +5 more
doaj   +1 more source

Automatic Adaptive and Targeted Localized Refinement in Transient Structural Dynamic Simulations Using the Multiresolution Finite Wavelet Domain Method

International Journal for Numerical Methods in Engineering, Volume 127, Issue 1, 15 January 2026.
ABSTRACT The multiresolution finite wavelet domain method has been meticulously studied in numerous wave propagation simulations, showing excellent convergence properties and very fast computing times. The multiresolution procedure always starts with the coarse solution, and then finer solutions can be superimposed on the coarse solution until ...
Dimitris Dimitriou, Katerina Samara, Dimitris Saravanos   +2 more
wiley   +1 more source

Computing continuous-time growth models with boundary conditions via wavelets [PDF]

, 2004
This paper presents an algorithm for approximating the solution of deterministic/stochastic continuous-time growth models based on the Euler's equation and the transversality conditions.
Mercedes Esteban-bravo, Jose M. Vidal-sanz, Vidal-Sanz, Jose M., Esteban-Bravo, Mercedes   +3 more
core   +1 more source

Two highly accurate and efficient numerical methods for solving the fractional Liénard’s equation arising in oscillating circuits

Partial Differential Equations in Applied Mathematics
In this paper, we investigate the fractional model of the Liénard and Duffing equations with the Liouville-Caputo fractional derivative. These equations grow with the evolution of radio and vacuum tube technology, which describe oscillating circuits and ...
Mohamed El-Gamel, Yasser Kashwaa, Mahmoud Abd El-Hady   +2 more
doaj   +1 more source

Wavelet Quadtree Contrast Limited Adaptive Histogram Equalisation Tablet Enhancement Method for Defect Detection in Low‐Contrast Tablets

IET Image Processing, Volume 20, Issue 1, January/December 2026.
This paper proposes a novel image enhancement method, WCTE, which integrates Haar wavelet transform and adaptive CLAHE to improve the visibility of low‐contrast tablet images. Combined with the YOLOv11 model, this approach significantly boosts defect detection accuracy, especially for half‐grain and paste tabtal.
Zimei Tu, Qinna Wang, Zhicheng Jiang, Jinhua Jiang   +3 more
wiley   +1 more source

Numerical Solution of Nonlinear Volterra-Fredholm Integral Equations Using Haar Wavelet Collocation Method

, 2017
In this paper, we present a numerical solution of nonlinear Volterra-Fredholm integral equations using Haar wavelet collocation method. Properties of Haar wavelet and its operational matrices are utilized to convert the integral equation into a system of
R.A. Mundewadi, S.C. Shiralashetti
core   +1 more source

Enhanced Illumination for Robust Steel Wire Rope Damage Detection Using IRetinexformer and LIME

IET Image Processing, Volume 20, Issue 1, January/December 2026.
This study proposes a novel surface damage detection method for mine hoisting steel wire ropes (HSWRs) that integrates an improved Retinexformer with BM3D denoising and the LIME algorithm to address challenges of uneven illumination and shadow occlusion in low‐light conditions.
Fengzhong Sun, Yiping Yuan, Fan Jiang, Zishan Zhao, Ping Zhou, Xianli Duan   +5 more
wiley   +1 more source