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Emergence of very long time fluctuations and 1/f noise in ideal flows
(American Physical Society, 2011-06)
This paper shows the connection between three previously observed but seemingly unrelated phenomena in hydrodynamic (HD) and magnetohydrodynamic (MHD) turbulent flows, involving the emergence of fluctuations occurring on ...
Time-frequency analysis combining wavelets and the envelope technique for fault identification in rotary machines
(2013-03-18)
Nowadays the method based on demodulation by envelope finds wide application in industry as a technique for evaluation of bearings and other components in rotating machinery. In recent years the application of Wavelets for ...
A new technique for separation of partial discharge sources and electromagnetic noise in radiofrequency measurements using energy ratios of different antennas
(Wiley-Blackwell, 2021-01-11)
One of the main tools for monitoring the condition of high voltage equipment is the measurement of partial discharges (PD). The electromagnetic (EM) radiation originated from this degradation phenomenon can be captured by ...
Compensation of laser frequency fluctuations and phase noise in 16-QAM coherent receivers
(Institute of Electrical and Electronics Engineers, 2013-01-18)
Frequency fluctuations caused by mechanical vibrations, power supply noise, and other mechanisms are detrimental to the phase estimator performance in high speed intradyne coherent optical receivers. In this letter, we ...
On the performance of joint iterative detection and decoding in coherent optical channels with laser frequency fluctuations
(Elsevier Science Inc, 2015-05)
The joint iterative detection and decoding (JIDD) technique has been proposed by Barbieri et al. (2007) with the objective of compensating the time-varying phase noise and constant frequency offset experienced in satellite ...
Acoustical design of an electrical emergency plant using sea method
(2006)
The statistical energy analysis was used in the acoustical design of an electrical emergency plant to reduce the outdoor noise level. In the past when the plant was working a high annoying noise was heard all over the ...