Results 111 to 120 of about 5,089 (226)
Detecção e controle de oscilações eletromecânicas usando sistemas de medição fasorial sincronizada [PDF]
, 2011 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia ElétricaNeste documento são apresentadas técnicas de processamento digital de sinais com a finalidade de analisar oscilaçoes e detectar
Prioste, Fernando Buzzulini
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Advances in Mechanical Engineering, 2016 Due to the characteristics of structure, brushless direct current motor has a long lifetime, which makes it more difficult to obtain failure data. Accordingly, valid degeneration characteristics are required in life prediction.
Wenhui Fan +3 more
doaj +1 more source
Leak Detection in Gas Pipeline using Hilbert-Huang Transform [PDF]
, 2015 This paper proposes a leak detection method using acoustic. The Hamming chirp signal injected into the pipeline system and the estimation of the leak location from the delay time passing by the reflection in the pipeline if there is a leak.
M. F., Ghazali +3 more
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Comparative analysis of series fault arc detection methods
Gong-kuang zidonghua, 2017 For uncertainty of line fault location, current series fault arc detection methods are mainly based on current signal analysis. By comparing current waveforms before and after series arc fault under different loads, characteristics and regularities of ...
GUO Fengyi +4 more
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Hilbert-Huang Transform based multifractal analysis of China stock market [PDF]
, 2014 National Natural Science Foundation of China (NSFC) [11202122, 11301433, 11332006]; 'Pu Jiang' project of Shanghai [12PJ1403500]; Social Science Foundation of Fujian [2013C056]In this paper, we employ the Hilbert-Huang Transform to investigate the ...
李木易, Li, Muyi, Huang, Yongxiang
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Estimation of Teager energy using the Hilbert–Huang transform
IET Signal Processing, 2015 A new method to estimate the Teager energy (TE) is presented here which uses an instantaneous energy expression and the Hilbert–Huang transform (HHT). The energy expression depends on the square of the instantaneous amplitude and digital frequency of the signal.
openaire +1 more source
DISTINCTION OF TWO DIFFERENT NON-STATIONARY SIGNALS WITH HILBERT-HUANG TRANSFORM [PDF]
, 2020 : In order to distinguish the difference of non-stationary signals, the novel time-frequency analysis approach, i.e. Hilbert-Huang transform (HHT), is applied in this paper. Firstly, Hilbert-Huang transform is briefly introduced.
Qingkai Han +4 more
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Steganalysis of Enhanced BPCS Steganography Using the Hilbert-Huang Transform Based Sequential Analysis [PDF]
, 2008 In this paper, we present a steganalytic method to attack the enhanced BPCS steganography (for short EBPCS) proposed by Niimi et al. The key element of the method is analysis of the bitplane-block complexity difference sequences between stego images and ...
Huang, Jiwu +5 more
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HILBERT-HUANG TRANSFORM ANALYSIS OF SOUND OF VERTICAL BAMBOO FLUTE (DONGXIAO) [PDF]
, 2007 This study applies the Hilbert-Huang Transform (HHT) as a tool for dongxiao timbre analysis, and compares the results with those of Short-Time Fourier Transform. Because the donxiao timbre is not very stationary (especially at the beginning of the timbre)
梁伯達, Liang, Po-Ta
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Cognitive Radio Sensing Using Hilbert Huang Transform
Wireless Engineering and Technology, 2010 Vast segments of the frequency spectrum are reserved for primary (licensed) users. These legacy users often un-der-utilize their reserved spectrum thus causing bandwidth waste. The unlicensed (secondary) users can take advantage of this fact and exploit the spectral holes (vacant spectrum segments). Since spectrum occupancy is transient in nature it is
K. A. Narayanankutty +5 more
openaire +2 more sources