Results 111 to 120 of about 21,592 (299)
Fault Detection of Electric Motors via Symmetrized Dot Pattern‐Based Features
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT This study proposes a novel symmetrized dot pattern (SDP) approach using designed SDP‐based features, extracted from transformed vibration signals, for fault detection. These features describe the compactness, inclination, and shape of the “snowflake” diagram distributions.
Mario Spirto +6 more
wiley +1 more source
Estimation of the respiratory rate from ballistocardiograms using the Hilbert transform. [PDF]
Biomed Eng Online, 2022 Linschmann O +3 more
europepmc +1 more source
Some Remarks about the Hilbert Transform and Analysis Signal Formation
, 2018 An algorithm involving signal processing in both the time and frequency domail is shown to compute Hilbert ...
Criscuolo Giuliana
core
Jixie chuandong, 2012 According to the nonstationarity and nonlinearity of the broken teeth fault of gear,the Hilbert-Huang transform is employed.Firstly,the a series of Intrinsic Mode Functions（IMFs） are obtained by the Empirical Mode Decomposition （EMD）method.Secondly,the ...
严作堂, 陈宏
doaj
MQAM modulation scheme recognition using Hilbert transform
Tongxin xuebao, 2007 A modulation scheme recognition algorithm for MQAM signals was proposed.The method does not require the prior information about baud rate and carrier frequency of the received signals.Baud rate is estimated first,then re-sampling,Hilbert transformation ...
XI Jia-xi, WANG Zong-xin
doaj +2 more sources
Graph Fractional Hilbert Transform: Theory and Application
Fractal and FractionalThe graph Hilbert transform (GHT) is a key tool in constructing analytic signals and extracting envelope and phase information in graph signal processing.
Daxiang Li, Zhichao Zhang
doaj +1 more source
Shock and Vibration, 2016 In spark ignition engines, knock onset limits the maximum spark advance. An inaccurate identification of this limit penalises the fuel conversion efficiency.
Fengrong Bi +4 more
doaj +1 more source
New views of some invariants associated with the Cartesian 2D velocity gradient tensor
Quarterly Journal of the Royal Meteorological Society, EarlyView.Vorticity and divergence of horizontal flow are fundamental quantities in meteorology; both are linear functions of the four elements of the 2D velocity gradient tensor and both are formally unchanged under coordinate rotation. We explore four quadratic functions of the elements that are geometrically invariant in this sense, finding some novel ...
I. Roulstone, S. A. Clough, A. A. White
wiley +1 more source
Seismic Signal Analysis Based on Variational Mode Decomposition and Hilbert Transform for Ground Intrusion Activity Classification. [PDF]
Sensors (Basel), 2023 Sun Y, Qian D, Zheng J, Liu Y, Liu C.
europepmc +1 more source
Hilbert transform associated with the fractional Fourier transform
, 1998 The analytic part of a signal f (t) is obtained by suppressing the negative frequency content of f, or in other words, by suppressing the negative portion of the Fourier transform, (f) over cap of f.
core +1 more source