Results 41 to 50 of about 40,887 (301)

Complex Wavelet Transform-Based Face Recognition

open access: yesEURASIP Journal on Advances in Signal Processing, 2009
Complex approximately analytic wavelets provide a local multiscale description of images with good directional selectivity and invariance to shifts and in-plane rotations.
doaj   +1 more source

From the construction of wavelets based on derivatives of the Gaussian function to the synthesis of filters with a finite impulse response

open access: yesНаучно-технический вестник информационных технологий, механики и оптики
For continuous wavelet transformation, wavelets based on derivatives of the Gauss function are used, and for multiscale analysis, Daubechies wavelets are used.
V. I. Semenov, S. G. Chumarov
doaj   +1 more source

Multivariate box spline wavelets in higher-dimensional Sobolev spaces

open access: yesJournal of Inequalities and Applications, 2018
We construct wavelets and derive a density condition of MRA in a higher-dimensional Sobolev space. We give necessary and sufficient conditions for orthonormality of wavelets in Hs(Rd) $H^{s}(\mathbb {R}^{d})$.
Raj Kumar, Manish Chauhan
doaj   +1 more source

Wavelet‐type frames and wavelet‐type bases [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
The concepts of basis and frame are studied in the classical literature of functional analysis, Fourier analysis, and wavelet theory in a wide range. In this paper, we consider an operator‐theoretic approach to discrete frame theory on a separable Hilbert space.
openaire   +3 more sources

Structural and biochemical analysis of a B12 superbinder

open access: yesFEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices   +3 more
wiley   +1 more source

An Algorithm for nth Order Intgro-Differential Equations by Using Hermite Wavelets Functions

open access: yesمجلة بغداد للعلوم, 2014
In this paper, the construction of Hermite wavelets functions and their operational matrix of integration is presented. The Hermite wavelets method is applied to solve nth order Volterra integro diferential equations (VIDE) by expanding the unknown ...
Baghdad Science Journal
doaj   +1 more source

Unlocking the potential of cell‐permeable nanobodies for intracellular applications

open access: yesFEBS Letters, EarlyView.
This review outlines current strategies for delivery of nanobodies into cells and highlights recent examples of functional applications. By addressing and manipulating intracellular targets, these molecules hold great potential for treating cancer, respiratory diseases and neurological disorders, making this a vibrant area of research in the biomedical
Mariona Gené‐Verdés   +2 more
wiley   +1 more source

An Efficient Numerical Method Based on Bell Wavelets for Solving the Fractional Integro-Differential Equations with Weakly Singular Kernels

open access: yesFractal and Fractional
A novel numerical scheme based on the Bell wavelets is proposed to obtain numerical solutions of the fractional integro-differential equations with weakly singular kernels.
Yanxin Wang, Xiaofang Zhou
doaj   +1 more source

New generalized operational matrix of integration to solve nonlinear singular boundary value problems using Hermite wavelets

open access: yesArab Journal of Basic and Applied Sciences, 2019
In this article, we developed new operational matrix of integration using Hermite wavelets and represented in generalized form also contributed a new algorithm (Hermite wavelets operational matrix method) for obtaining solutions of second-order nonlinear
Siddu Channabasappa Shiralashetti   +1 more
doaj   +1 more source

APLICAÇÃO DE WAVELETS PARA REMOÇÃO DE RUÍDOS EM SINAIS UNIDIMENSIONAIS

open access: yesHolos, 2008
Este trabalho descreve uma investigação da filtragem de diferentes tipos de sinais utilizando Wavelets, através do estudo empírico do nível de Threshold. Foram utilizados sinais senoidais padrão e sinais de voz.
Aderson Cleber Pifer   +2 more
doaj   +1 more source

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