Results 51 to 60 of about 26,332,569 (198)

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

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  

Methods for Harmonic Analysis and Reporting in Future Grid Applications

open access: yesIEEE Transactions on Power Delivery, 2017
The rollout of advanced metering infrastructure, advanced distribution automation schemes, and integration of generation into distribution networks, along with a raising of awareness of power quality (PQ), means that there is an increase in the ...
S. Elphick   +5 more
semanticscholar   +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

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  

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

Abstract Harmonic Analysis

open access: yes, 1963
harmonic analysis, volume II : structure and analysis for compact groups analysis on locally compact abelian groups / Edwin Hewitt, Kenneth A. Ross Author : Hewitt, Edwin Subject : 1.
E. Hewitt, K. Ross
semanticscholar   +1 more source

Study on the Unipolar Impulse Aging Characteristics of ZnO Varistors and Their Condition Monitoring Methods

open access: yesApplied Sciences
Metal-oxide surge arresters (MOSAs) are critical devices for overvoltage protection in power systems, and the aging characteristics of their zinc oxide (ZnO) varistors under impulse and power-frequency voltages exhibit significant differences.
Yongqiang Fan   +7 more
doaj   +1 more source

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