Results 11 to 20 of about 70,369 (269)

Elliptic-Cylindrical Wavelets: The Mathieu Wavelets [PDF]

open access: yesIEEE Signal Processing Letters, 2004
10 pages, 2 ...
M. M. S. Lira   +2 more
openaire   +2 more sources

Osiris wavelets and Set wavelets [PDF]

open access: yesJournal of Applied Mathematics, 2004
An alternative to Osiris wavelet systems is introduced in two dimensions. The basic building blocks are continuous piecewise linear functions supported on equilateral triangles instead of on squares. We refer to wavelets generated in this way as Set wavelets. We introduce a Set wavelet system whose homogeneous mode density is 2/5.
openaire   +4 more sources

Wavelet Transparency

open access: yesCoRR, 2021
Order-independent transparency schemes rely on low-order approximations of transmittance as a function of depth. We introduce a new wavelet representation of this function and an algorithm for building and evaluating it efficiently on a GPU. We then extend the order-independent Phenomenological Transparency algorithm to our representation and introduce
Maksim Aizenshtein   +2 more
openaire   +2 more sources

Wavelet deconvolution

open access: yesIEEE Transactions on Information Theory, 2002
Summary: This paper studies the issue of optimal deconvolution density estimation using wavelets. The approach taken here can be considered as orthogonal series estimation in the more general context of the density estimation. We explore the asymptotic properties of estimators based on thresholding of estimated wavelet coefficients.
Jianqing Fan, Ja-Yong Koo
openaire   +3 more sources

Wavelet Analysis on the Sphere [PDF]

open access: yes, 2017
The goal of this monograph is to develop the theory of wavelet harmonic analysis on the sphere. By starting with orthogonal polynomials and functional Hilbert spaces on the sphere, the foundations are laid for the study of spherical harmonics such as zonal functions.
Mabrouk, Anouar Ben   +2 more
openaire   +4 more sources

Effective Wavelet Algorithm for an Automatic Detection of Atrial Fibrillation

open access: yesAdvances in Electrical and Computer Engineering, 2020
Cardiac anomalies are usually marked through irregular cardiac cycles. Atrial fibrillation is given through a rapid beating of the atria, announcing a possible heart failure or stroke. Electrocardiograms are an efficient way of supervising the electric
ARVINTI, B., ISAR, A., COSTACHE, M.
doaj   +1 more source

Experimental Analysis of Cooling Fan Noise by Wavelet-Based Beamforming and Proper Orthogonal Decomposition

open access: yesIEEE Access, 2020
We use the proper orthogonal decomposition (POD) method to decompose acoustic imaging from wavelet-based beamforming results into their corresponding modes, and demonstrate the method to analyze the noise characteristics of small-dimensional components ...
Sicong Liang   +3 more
doaj   +1 more source

Beam-like damage detection methodology using wavelet damage ratio and additional roving mass

open access: yesFracture and Structural Integrity, 2022
Early damage detection plays an essential role in the safe and satisfactory maintenance of structures. This work investigates techniques that use only damaged structure responses.
Juliana C. Santos   +5 more
doaj   +1 more source

Adjustment and Assessment of the Measurements of Low and High Sampling Frequencies of GPS Real-Time Monitoring of Structural Movement

open access: yesISPRS International Journal of Geo-Information, 2016
Global Positioning System (GPS) structural health monitoring data collection is one of the important systems in structure movement monitoring. However, GPS measurement error and noise limit the application of such systems. Many attempts have been made to
Mosbeh R. Kaloop   +2 more
doaj   +1 more source

Forecasting daily river flow using an artificial flora–support vector machine hybrid modeling approach (case study: Karkheh Catchment, Iran) [PDF]

open access: yesEnvironmental Resources Research, 2020
In this study, a hybrid support vector machine–artificial flora algorithm method was developed to estimate the flow rate of Karkheh Catchment rivers using daily discharge statistics.
R. Dehghani   +3 more
doaj   +1 more source

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