The short time Fourier transform time-frequency representation (STFT-TFR) method degenerates, and the corresponding short time Fourier transform time-frequency filtering (STFT-TFF) method fails under stable distribution noise environment. A fractional low order short time Fourier transform (FLOSTFT) which takes advantage of fractional order moment is proposed for stable distribution noise environment, and the corresponding FLOSTFT time-frequency representation (FLOSTFT-TFR) algorithm is presented in this paper. We study vector formulation of the FLOSTFT and inverse FLOSTFT (IFLOSTFT) methods and propose a FLOSTFT time-frequency filtering (FLOSTFT-TFF) method which takes advantage of time-frequency localized spectra of the signal in time-frequency domain. The simulation results show that, employing the FLOSTFT-TFR method and the FLOSTFT-TFF method with an adaptive weight function, time-frequency distribution of the signals can be better gotten and time-frequency localized region of the signal can be effectively extracted from stable distribution noise, and also the original signal can be restored employing the IFLOSTFT method. Their performances are better than the STFT-TFR and STFT-TFF methods, and MSEs are smaller in different and GSNR cases. Finally, we apply the FLOSTFT-TFR and FLOSTFT-TFF methods to extract fault features of the bearing outer race fault signal and restore the original fault signal from stable distribution noise; the experimental results illustrate their performances.
from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/2pliJXD
via IFTTT
Εγγραφή σε:
Σχόλια ανάρτησης (Atom)
Δημοφιλείς αναρτήσεις
-
Cancer is associated with genomic instability and aging. Genomic instability stimulates tumorigenesis, whereas deregulation of oncogenes acc...
-
Eribulin is one of the newer chemotherapeutic agents approved for use in later line treatment of patients with metastatic breast cancer. Pha...
-
<span class="paragraphSection"><div class="boxTitle">Abstract</div>It is not clear whether breast canc...
-
Related Articles Disrupted relationship between "resting state" connectivity and task-evoked activity during social percepti...
-
Abstract Helmet manufacturers recommend replacing a bicycle helmet after an impact or after anywhere from 2 to 10 years of use. The goal o...
-
Summary Emergency cricothyrotomy is a common feature in all difficult airway algorithms. It is the final step following a ‘can't intub...
-
Publication date: 10 June 2017 Source: Journal of Controlled Release, Volume 255 Author(s): Ožbej Zupančič, Andreas Bernkop-Schnürch Pept...
-
Ocular Vestibular Evoked Myogenic Potentials: Where Are We Now? Objective: Over the last decade, ocular vestibular evoked myogenic potential...
-
ACS Nano DOI: 10.1021/acsnano.7b01172 from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/2qaCNQg via...
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου