Repozytorium Eny Politechnika Wrocławska

Repozytorium W. Elektrycznego Politechniki Wrocławskiej Znaleziono 192 rekordów  początekpoprzedni168 - 192  skocz do rekordu: Szukanie trwało 0.02 sekund. 
168. Phase relations in Bi2O3-SrO-CuO system at 800 degrees C / Horyn, R ; Filatow, I ; Ziaja, J ; Wolcyrz, M ; et al [AZ I07/89/P-394] [ENY-ARTICLE-2008-044]
Phase relations in the Bi2O3SrO-CuO system at 800°C are presented. [...]
http://zet10.ipee.pwr.wroc.pl/record/53/files/
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169. Varistor performance of nanocrystalline Zn-Bi-O thin films prepared by reactive RF magnetron sputtering at room temperature / Mista, W ; Ziaja, J ; Gubanski, A [AZ I07/03/P-004doi:10.1016/j.vacuum.2003.12.141] [ENY-ARTICLE-2008-042]
The Zn–Bi–O films were deposited by reactive radio frequency magnetron sputtering in oxygen atmosphere from ZnBi alloy target (wt. [...]
http://zet10.ipee.pwr.wroc.pl/record/50/files/
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170. Effect of area on surface flashover voltage in vacuum / Cross, J D ; Mazurek, B [ISSN: 0018-9367INSPEC:3152462DOI: 10.1109/14.2330] [ENY-ARTICLE-2008-041]
It is known that the breakdown voltage in a vacuum insulation system drops with an increase in linear dimension of electrodes and with an increase in the number of insulating spacers bridging the gap. [...]
http://zet10.ipee.pwr.wroc.pl/record/49/files/
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171. Spectral estimation of distorted signals using Prony method / Lobos, T ; Rezmer, J [ENY-ARTICLE-2008-040]
Modern Frequency power converters generate a wide spectrum of harmonic components. [...]
http://zet10.ipee.pwr.wroc.pl/record/48/files/
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172. Parameter Estimation of Distorted Signals Using Prony Method / Lobos, T ; Rezmer, J ; Schegner, P [ENY-ARTICLE-2008-039]
Modern frequency power converters generate a wide spectrum of harmonic components. [...]
http://zet10.ipee.pwr.wroc.pl/record/47/files/
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173. Spectrum estimation of non- stationary signals in power systems / Leonowicz, Z ; Lobos, T ; Rezmer, J [ENY-ARTICLE-2008-038]
Time-varying spectra of non-stationary time-series commonly used are spectrograms from the Short-Time Fourier Transform (STFT). [...]
http://zet10.ipee.pwr.wroc.pl/record/46/files/
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174. Comparison between step and pulsed electroacoustic techniques using both PVDF and LiNbO3 transducers / Motyl, E [AZ I07/01/I-020] [ENY-ARTICLE-2008-037]
Two kinds of piezoelectric transducers thin PCDF foil and thick LiBNO3 crystal were used as strain waves detectors. [...]
http://zet10.ipee.pwr.wroc.pl/record/44/files/
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175. Changes of space charge profiles in PET electrets after thermally stimulated discharges / Motyl, E [RZ I07/02/I-053] [ENY-ARTICLE-2008-036]
Behaviour of electric changes in the PET film has been investigated under the condition of partial discharging at higher annealing temperatures. [...]
http://zet10.ipee.pwr.wroc.pl/record/43/files/
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176. Application of TSD and SEA methods for measurements of space charge and polarisation in PET electrets / Motyl, E ; Krause, T [RZ I07/03/I-030] [ENY-ARTICLE-2008-033]
The step electroacoustic (SEA) and thermally stimulated discharge (TSD) methods were applied for analysis of electret state in corona charged samples. [...]
http://zet10.ipee.pwr.wroc.pl/record/40/files/
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177. Real-Time Parameter Estimation of Signals in Converter Fed Drives using Adaptive Neural Networks / Lobos, T ; Koglin, H J ; Waclawek, Z [ENY-ARTICLE-2008-031]
Frequency converter-fed induction motor drives were simulated using the EMTP-ATP (Electromagnetic Transients Program - Alternative Transients Program) The aim of the simulation investigations is to develop a feasible method for drive visualisation and for diagnosis of different unsymmetrical operations. [...]
http://zet10.ipee.pwr.wroc.pl/record/38/files/
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178. Detection of the Fundamental Harmonic of Distorted Signals using Min-Norm Method / Lobos, T ; Leonowicz, Z ; Piotrowicz, J [ENY-ARTICLE-2008-030]
Spectrum analysis is a fundamental tool for diagnostic purposes widely used in monitoring and diagnostic systems. [...]
http://zet10.ipee.pwr.wroc.pl/record/37/files/
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179. Time-frequency analysis of non-stationary three phase signals / Leonowicz, Z ; Lobos, T [ENY-ARTICLE-2008-028]
New method of observation and diagnosis of inverter-fed induction motor drives is developed and tested. [...]
http://zet10.ipee.pwr.wroc.pl/record/35/files/
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180. Parametric Spectral Estimation for Power Quality Assessment / Leonowicz, Z ; Lobos, T [1-4244-0813-X/07/$20.00 2007 IEEE] [ENY-ARTICLE-2008-025]
The authors show that the use of highresolution spectrum estimation methods instead of Fourier-based techniques can improve the accuracy of measurement of spectral parameters of distorted waveforms encountered in power systems, in particular the estimation of the power quality indices (such as harmonic and interharmonic groups and subgroups). [...]
http://zet10.ipee.pwr.wroc.pl/record/32/files/
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181. Power system harmonics estimation using linear least squares method and SVD / Lobos, T ; Kozina, T ; Koglin, H J [ISSN: 1350-2360CODEN: IGTDE2INSPEC: 7099688AZ I07/01/I-073] [ENY-ARTICLE-2008-022]
The paper examines singular value decomposition (SVD) for the estimation of harmonics in signals in the presence of high noise. [...]
http://zet10.ipee.pwr.wroc.pl/record/29/files/
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182. Effect of Air Humidity on Charge Decay and Lifetime of PP Electret Nonwovens / Motyl, E ; Lowkis, B [ENY-ARTICLE-2008-015]
The effects of air humidity on the charge decay and lifetime of polypropylene (PP) electret nonwovens manufactured by the pneumothermic method are presented. [...]
http://zet10.ipee.pwr.wroc.pl/record/17/files/
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183. Time-frequency analysis of non-stationary signals in power systems / Lobos, T ; Rezmer, J ; Sikorski, T ; Schegner, P [RZ I07/04/I-008] [ENY-ARTICLE-2008-014]
Representation of signals in time and frequency domain has been of interest in signal processing areas for many years, especially taking in the limelight time-varying non-stationary signals. [...]
http://zet10.ipee.pwr.wroc.pl/record/16/files/
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184. Evaluation of compensation devices of DC arc furnaces using advanced spectrum estimation methods / Bracale, A ; Carpinelli, G ; Lobos, T ; Leonowicz, Z ; et al [RZ I07/05/I-026] [ENY-ARTICLE-2008-011]
Spectral representation of waveform distor-tions has been of great interest in power systems for many years since the disturbing loads generate a wide spectrum of components which deteriorate the quality of power supply. [...]
http://zet10.ipee.pwr.wroc.pl/record/13/files/
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185. Real-Time Determination of Power System Frequency / Lobos, T ; Rezmer, J [ENY-ARTICLE-2008-009]
The main frequency is an important parameter of an electrical power system. [...]
http://zet10.ipee.pwr.wroc.pl/record/10/files/
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186. High resolution spectrum-estimation methods for signal analysis in power systems. / Lobos, T ; Leonowicz, Z ; Rezmer, J ; Schegner, P [AZ I07/06/I-006] [ENY-ARTICLE-2008-008]
The spectrum-estimation methods based on the Fourier transform suffer from the major problem of resolution. [...]
http://zet10.ipee.pwr.wroc.pl/record/9/files/
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187. Harmonics and interharmonics estimation using advanced signal processing methods / Lobos, T ; Leonowicz, Z ; Rezmer, J [ENY-ARTICLE-2008-007]
Modern frequency power converters generate a wide spectrum of harmonic components · In some cases, large converter systems generate not only characteristic harmonics typical for the ideal converter operation, but also a considerable amount of non-characteristic harmonics and interharmonics.
http://zet10.ipee.pwr.wroc.pl/record/8/files/
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188. Model order selection criteria: comparative study and applications / Leonowicz, Z ; Karvanen, J ; Tanaka, T ; Rezmer, J [ENY-ARTICLE-2008-006]
Artykuł przedstawia kryteria i porównanie metod redukcji modelu procesu. [...]
http://zet10.ipee.pwr.wroc.pl/record/7/files/
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189. Measurement of IEC Groups and Subgroups by using Advanced Spectrum Estimation Methods / Bracale, A ; Carpinelli, G ; Leonowicz, Z ; Lobos, T ; et al [ENY-ARTICLE-2008-005]
IEC Standards characterize the waveform distortions in power systems with the amplitudes of harmonic and interharmonic groups and subgroups. [...]
http://zet10.ipee.pwr.wroc.pl/record/5/files/
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190. Application of higher-order spectra for signal processing in electrical power engineering / Lobos, T ; Leonowicz, Z ; Szymanda, J ; Ruczewski, P [ENY-ARTICLE-2008-004]
In power spectrum estimation, the signal under consideration is processed in such a way, that the distribution of power among its frequency is estimated and phase relations between the frequency components are suppressed. [...]
http://zet10.ipee.pwr.wroc.pl/record/4/files/
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191. Advanced Spectrum Estimation Methods for Signal Analysis in Power Electronics / Leonowicz, Z ; Lobos, T ; Rezmer, J [ENY-ARTICLE-2008-003]
Modern frequency power converters generate a wide spectrum of harmonics components. [...]
http://zet10.ipee.pwr.wroc.pl/record/3/files/
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192. Analysis of non-stationary signals in power systems / Leonowicz, Z [ENY-ARTICLE-2008-002]
Classical techniques to estimate the spectrum of the multi-component signal are based on Fourier-based transformations. [...]
http://zet10.ipee.pwr.wroc.pl/record/2/files/
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Repozytorium W. Elektrycznego Politechniki Wrocławskiej : Znaleziono 192 rekordów   początekpoprzedni168 - 192  skocz do rekordu:
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