Results 41 to 50 of about 23,396,150 (160)

Influence of the Supply Voltage Variation on the Conducted Emission in the Frequency Range up to 150 kHz Injected into the Power Grid by CFL and LED Lamps—Case Study

open access: yesApplied Sciences
In normal operating conditions, the mains voltage level provided by low-voltage distribution networks follows time-varying patterns within permissible limits.
Wojciech Frydlewicz   +4 more
doaj   +1 more source

General analysis of type I second-harmonic generation with elliptical Gaussian beams

open access: yes, 1997
One can enhance second-harmonic generation in angle-tuned crystals by focusing the fundamental to an elliptical waist in the crystal. We present a general analysis for type I phase-matched uniaxial and biaxial crystals that will find particular ...
Walz, Jochen   +4 more
core   +1 more source

On X ̃-frames and conjugate systems in Banach spaces

open access: yesSahand Communications in Mathematical Analysis, 2014
The generalization of p-frame in Banach spaces is considered in this paper. The concepts of an X~-frame and a system conjugate to X~-frame were introduced. Analogues of the results on the existence of conjugate system were obtained.
Migdad Ismailov, Afet Jabrailova
doaj  

Operational modal analysis with non stationnary inputs [PDF]

open access: yes, 2013
Operational modal analysis (OMA) techniques enable the use of in-situ and uncontrolled vibrations to be used to lead modal analysis of structures. In reality operational vibrations are a combination of numerous excitations sources that are much more ...
Michon, Guilhem   +3 more
core  

The evolution of applied harmonic analysis: models of the real world

open access: yes, 2016
A sweeping exploration of the development and far-reaching applications of harmonic analysis such as signal processing, digital music, optics, radio astronomy, crystallography, medical imaging, spectroscopy, and more. Featuring a wealth of illustrations,
Elena Prestini, Prestini, Elena
core   +1 more source

A unified theoretical harmonic analysis approach to the cyclic wavelet transform

open access: yesSahand Communications in Mathematical Analysis, 2014
The article introduces cyclic dilation groups and finite affine groups for prime integers, and as an application of this theory it presents a unified group theoretical approach for the cyclic wavelet transform (CWT) of prime dimensional periodic ...
Arash Ghaani Farashahi   +1 more
doaj  

Analysis and Optimization of DC-DC Converters Through Sensitivity to Parametric Variations

open access: yesTechnologies
The optimization of DC-DC converters is crucial for enhancing their performance and efficiency in various applications. This study focuses on the sensitivity analysis of DC-DC converters to parametric variations, which plays a key role in designing ...
Nikolay Hinov   +2 more
doaj   +1 more source

Could k-NN Classifier be Useful in Tree Leaves Recognition?

open access: yesArchives of Control Sciences, 2014
This paper presents a method for affine invariant recognition of two-dimensional binary objects based on 2D Fourier power spectrum. Such function is translation invariant and their moments of second order enable construction of affine invariant spectrum ...
Horaisová Kateřina, Kukal Jaromir
doaj   +1 more source

Quadrature Domains and Their Two-Phase Counterparts

open access: yes, 2013
This survey describes recent advances on quadrature domains that were made in the context of the ESF Network on Harmonic and Complex Analysis and its Applications (2007–2012).
Stephen J. Gardiner   +3 more
core   +1 more source

FRACTIONAL WINDINGS HARMONIC ANALYSIS

open access: yesElectrical engineering & Electromechanics, 2013
Investigation results for multiphase windings of a united variety that includes windings with fractional and integer number of slots per pole and phase are given.
W.G. Degtev
doaj  

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