Electrical Engineering Wroclaw University of Technology

Electrical Engineering Wroclaw University of Technology 100 records found  beginprevious51 - 75next  jump to record: Search took 0.01 seconds. 
51. Power quality evaluation using advanced spectrum estimation methods / Leonowicz, Z ; Lobos, T [I07/2006/I-082] [ENY-ARTICLE-2008-174]
The authors show that the use of high-resolution 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 inter/harmonic groups and subgroups) . [...]
http://zet10.ipee.pwr.wroc.pl/record/223/files/
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52. Analysis of influence of power quality disturbances using a neuro-fuzzy systems / Janik, P ; Leonowicz, Z ; Lobos, T ; Waclawek, Z [RZ I07/2007/I-025] [ENY-ARTICLE-2008-172]
The authors propose an automated neuro-fuzzy system approach (with neural network subsystem) to power quality assessment incorporating equipment susceptibility patterns. [...]
http://zet10.ipee.pwr.wroc.pl/record/221/files/
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53. New power quality indices / Leonowicz, Z ; [RZ I07/2007/I-024] [ENY-ARTICLE-2008-171]
The author shows that the use of high-resolution 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 inter/harmonic groups and subgroups). [...]
http://zet10.ipee.pwr.wroc.pl/record/220/files/
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54. Advanced Signal Processing Methods for Evaluation of Harmonic Distortion Caused by DFIG Wind Generator / Janik, P ; Leonowicz, Z ; Rezmer, J ; Schostan, S ; et al [ENY-ARTICLE-2008-154]
Intensified growth of wind power generation emphasizes the need for detailed evaluation of disturbances caused by wind generators. [...]
http://zet10.ipee.pwr.wroc.pl/record/201/files/
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55. Proceedings of the Int. Conference "7th EEEIC International Workshop on Environment and Electrical Engineering" / Schwarz, H ; Janik, P ; Leonowicz, Z ; Lehmann, D [ENY-PREPRINT-2008-008]
http://zet10.ipee.pwr.wroc.pl/record/190/files/
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56. Repozytorium Wydziałowe / Leonowicz, Z [ENY-TEACHING-2008-017]
Otwarte internetowe źródło informacji Wzrost IF naszych publikacji, CYTOWANIA (dowiedziony od 69 do 500% ponieważ tylko 15% naszych publikacji jest ŁATWO dostępnych). [...]
http://zet10.ipee.pwr.wroc.pl/record/156/files/
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57. Investigations of Influence on Power Quality of Superconducting Fault Current Limiter / Leonowicz, Z ; Xin, Y ; Rezmer, J ; Cao, Z ; et al [I07/2007/I-050] [ENY-ARTICLE-2008-120]
Waveforms obtained from a superconducting Fault Current Limiter are investigated using the Prony modeling technique. [...]
http://zet10.ipee.pwr.wroc.pl/record/155/files/
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58. Measurement of IEC Groups and Subgroups Using Advanced Spectrum Estimation Methods / Bracale, A ; Carpinelli, G ; Leonowicz, Z ; Lobos, T ; et al [ENY-ARTICLE-2008-117]
The International Electrotechnical Commission (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/152/files/
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59. Magnetostatyka - zadania / Skopec, A ; Leonowicz, Z [ENY-TEACHING-2008-016]
Zadania z magnetostatyki. [...]
http://zet10.ipee.pwr.wroc.pl/record/150/files/
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60. Rezystancja, rezystywność - zadania / Skopec, A ; Leonowicz, Z [ENY-TEACHING-2008-015]
Zadania z teorii pola dot. [...]
http://zet10.ipee.pwr.wroc.pl/record/149/files/
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61. Układy kondensatorowe - zadania / Skopec, A ; Leonowicz, Z [ENY-TEACHING-2008-014]
Zadania - układy kondensatorowe, teoria pola, Podstawy Elektrotechniki 2 .
http://zet10.ipee.pwr.wroc.pl/record/148/files/
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62. Elektrostatyka - zadania / Skopec, A ; Leonowicz, Z [ENY-TEACHING-2008-013]
Lista zadań z elektrostatyki, Podstawy Elektrotechniki 2.
http://zet10.ipee.pwr.wroc.pl/record/147/files/
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63. Synteza obwodów elektrycznych / Leonowicz, Z [ENY-TEACHING-2008-012]
Slajdy do wykładu Synteza obwodów liniowych (Obwody i Układy).
http://zet10.ipee.pwr.wroc.pl/record/146/files/
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64. Analysis of power quality disturbances using the S-Transform / Leonowicz, Z ; Lobos, T ; Wozniak, K [I07/2007/I-009] [ENY-ARTICLE-2008-111]
The method presented in this paper employs recently introduced S-transform which is an important development of STFT with improved properties. [...]
http://zet10.ipee.pwr.wroc.pl/record/140/files/
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65. Analysis of nonstationary electric signals using the S-transform. Zastosowanie transformaty S do analizy sygnałów niestacjonarnych w elektrotechnice / Leonowicz, Z ; Lobos, T ; Wozniak, K [I07/2005/I-018] [ENY-ARTICLE-2008-110]
Contemporary power systems, which contain a considerable number of non-linear loads, require advanced methods of spectral analysis for their investigation and control. [...]
http://zet10.ipee.pwr.wroc.pl/record/139/files/
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66. Application of higher-order spectra for signal processing in electrical power engineering / Leonowicz, Z ; Lobos, T ; Ruczewski, P ; Szymanda, J [I07/1997/I-317] [ENY-ARTICLE-2008-108]
During recent years higher order statistics (HOS) have found a wide applicability in many diverse fields, e. [...]
http://zet10.ipee.pwr.wroc.pl/record/137/files/
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67. Praktyczna realizacja systemów DSP / Leonowicz, Z [ENY-TEACHING-2008-011]
http://zet10.ipee.pwr.wroc.pl/record/117/files/
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68. Szybkie przekształcenie Fouriera / Leonowicz, Z [ENY-TEACHING-2008-010]
Wprawdzie DFT jest najbardziej bezpośrednią procedurą matematyczną do określania częstotliwościowej zawartości ciągu z dziedziny czasu, jest ona bardzo nieefektywna. [...]
http://zet10.ipee.pwr.wroc.pl/record/116/files/
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69. Dyskretne przekształcenie Fouriera / Leonowicz, Z [ENY-TEACHING-2008-009]
Dyskretne przekształcenie Fouriera (ang. [...]
http://zet10.ipee.pwr.wroc.pl/record/115/files/
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70. Dyskretna transformacja Fouriera / Leonowicz, Z [ENY-TEACHING-2008-008]
Celem wiczenia jest przeprowadzenie analizy widmowej sygnałów okresowych za pomocą szybkiego przekształcenia Fouriera (FFT) .
http://zet10.ipee.pwr.wroc.pl/record/114/files/
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71. Filtry cyfrowe / Leonowicz, Z [ENY-TEACHING-2008-001]
Cel ćwiczenia Celem ćwiczenia jest przeprowadzenie filtracji cyfrowej próbkowanych sygnałów przy wykorzystaniu środowiska programowania MATLAB® Zagadnienia do przygotowania o Próbkowanie sygnałów ciągłych, twierdzenie o próbkowaniu o Równania określające zależność pomiędzy pobudzeniem a odpowiedzią filtrów cyfrowych NOI i SOI. [...]
http://zet10.ipee.pwr.wroc.pl/record/90/files/
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72. Analysis of distorted waveforms using parametric spectrum estimation methods and robust averaging / Leonowicz, Z [ENY-ARTICLE-2008-074]
After the description of parametric methods (ESPRIT and MUSIC) and selected robust location measures (robust averaging methods), the comparison of the frequency and amplitude estimation error, based on numerical simulation is presented. [...]
http://zet10.ipee.pwr.wroc.pl/record/89/files/
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73. Analysis of Non-Stationary Signals in Power Systems using Wigner Transform and Min-Norm Method / Leonowicz, Z [ENY-PREPRINT-2008-005]
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/88/files/
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74. Time-Frequency Analysis of Distorted Electric Signals using a Complex Space-Phasor / Leonowicz, Z [ENY-PREPRINT-2008-004]
We consider applying non-parametric and parametric methods for calculation of time-frequency representation of non-stationary electric waveforms. [...]
http://zet10.ipee.pwr.wroc.pl/record/87/files/
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75. Classification of Electric Signals Based on Time-Frequency Signal Decomposition / Leonowicz, Z [ENY-PREPRINT-2008-003]
A classification procedure based on time-frequency decomposition of the signal is presented. [...]
http://zet10.ipee.pwr.wroc.pl/record/86/files/
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