Results 11 to 20 of about 401,492 (244)
IEEE Access, 2020 The time-frequency energy distribution processed by a short-time Fourier transform can be compressed to the real instantaneous frequency by the synchrosqueezing transformation (SST), which improves the time-frequency energy concentration of the signal ...
Xin Li +3 more
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IEEE Access, 2020 The fault vibration signal of rotating machinery system under strong background noise has the characteristics of non-stationary, non-Gaussian and complex components.
Yanfeng Li, Zhennan Han, Zhijian Wang
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Entropy, 2022 Instantaneous frequency in multi-sensor recordings is an important parameter for estimation of direction of arrival estimation, source separation, and sparse reconstruction.
Nabeel Ali Khan, Sadiq Ali, Kwonhue Choi
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Application of Local Histogram Clipping Equalization Image Enhancement in Bearing Fault Diagnosis
IEEE Access, 2022 Aiming at the problem that the time-frequency image of bearing fault characteristics is relatively weak and difficult to identify. This paper presents a time-frequency analysis method of local maximum synchrosqueezing transform based on image enhancement.
Zhiqiang Zeng +3 more
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An Improved Multi-Ridge Extraction Method Based on Differential Synchro-Squeezing Wavelet Transform
IEEE Access, 2021 It is very important to accurately extract the instantaneous frequency (IF) of complex non-stationary signals, so the signal processing methods based on IF are widely used in engineering.
Yanfeng Li +3 more
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Analyse des signaux AM-FM basée sur une version B-splines de l'EMD-ESA [PDF]
, 2012 In this paper a signal analysis framework for estimating time-varying amplitude and frequency functions of multicomponent amplitude and frequency modulated (AM–FM) signals is introduced.
BOUCHIKHI, Abdelkhalek +1 more
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Instantaneous Frequency Extraction Using the EMD-Based Wavelet Ridge to Reveal Geological Features
Frontiers in Earth Science, 2018 As one of the important seismic attributes, instantaneous frequency (IF) is widely used to reveal geological features. Compared to the normally IF extraction using Hilbert transform (HT), IF extraction using the wavelet ridge is demonstrated to have a ...
Ya-juan Xue +4 more
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Window Functions With Minimum-Sidelobe Derivatives for Computing Instantaneous Frequency
IEEE Access, 2022 In the field of nonstationary signal analysis and processing, the short-time Fourier transform (STFT) is frequently used to convert signals into the time-frequency domain.
Tsubasa Kusano +2 more
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One-shot 3d surface reconstruction from instantaneous frequencies: solutions to ambiguity problems [PDF]
, 2009 Phase-measuring profilometry is a well known technique for 3D surface reconstruction based on a sinusoidal pattern that is projected on a scene. If the surface is partly occluded by, for instance, other objects, then the depth shows abrupt transitions at
Heijden, F. van der +2 more
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Applied Sciences, 2022 The rub-impact fault, which occurs in the aeroengine, can cause frequency modulation (FM) in its vibration signal. Oscillated instantaneous frequency (IF) is a phenomenon of such a modulation mode, which carries critical fault information from the ...
Peng Zhang +7 more
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