Results 21 to 30 of about 2,678,584 (258)
ANALYSIS OF TEMPORAL AND FREQUENCY CHARACTERISTICS OF SIMULTANEOUS GEODEFORMATION SIGNALS REGISTERED AT “KARYMSHINA” SITE [PDF]
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2019 Simultaneous geodeformational observations have been carried out from 2016 to the present time at “Karymshina” site on Kamchatka. A laser deformograph-interferometer and a three-component seismoacoustic receiver were installed to conduct these ...
M. A. Mishchenko +2 more
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Robust sparse time‐frequency analysis for data missing scenarios
IET Signal Processing, 2023 Sparse time‐frequency analysis (STFA) can precisely achieve the spectrum of the local truncated signal. However, when the signal is disturbed by unexpected data loss, STFA cannot distinguish effective signals from missing data interferences.
Yingpin Chen, Yuming Huang, Jianhua Song
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Seismic Time-Frequency Analysis Based on Time-Reassigned Synchrosqueezing Transform
IEEE Access, 2021 In this paper, we propose a novel seismic time-frequency analysis method via the time-reassigned synchrosqueezing transform (TSST), in which the time-frequency coefficients are reassigned in the time direction rather than in the frequency direction as ...
Pingping Bing, Wei Liu, Yang Liu
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Joint time-frequency analysis on space-time-coding digital metasurfaces
JPhys Photonics, 2022 Space-time and time-varying metastructures have attracted a lot of research interest in recent years. On the other hand, digital programmable metasurfaces have also gained great attention owing to their powerful capabilities in controlling ...
Xiao Qing Chen +5 more
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Time-frequency analysis-based deep interference classification for frequency hopping system
EURASIP Journal on Advances in Signal Processing, 2022 It is known that interference classification plays an important role in protecting the authorized communication system and avoiding its performance degradation in the hostile environment.
Changzhi Xu +6 more
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Time and Frequency Domain Dynamic Analysis of Offshore Mooring
Journal of Marine Science and Engineering, 2021 The numerical procedures for dynamic analysis of mooring lines in the time domain and frequency domain were developed in this work. The lumped mass method was used to model the mooring lines. In the time domain dynamic analysis, the modified Euler method
Shi He, Aijun Wang
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A new transform for time-frequency analysis
IEEE Transactions on Signal Processing, 1992 The psi-decomposition of a signal, in which the signal is written as a weighted sum of certain elementary synthesizing functions, is described. The set S of synthesizing functions consists of dilated and translated copies of two parent functions, which are concentrated in both the time and the frequency domains.
Kumar, Arun +3 more
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Elementary Time Frequency Analysis of EEG Signal Processing
EAI Endorsed Transactions on Pervasive Health and Technology, 2018 EEG analysis is used as a tool for medical diagnosis of various diseases related to brain like epilepsy, dementia, brain disorders like stress etc. To identify such neural disorders it is essential to process these signal because of the nonstationary ...
Parag Puranik +2 more
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LEAST SQUARES MULTI-WINDOW EVOLUTIONARY SPECTRAL ESTIMATION
Electrica, 2003 We present a multi-window method for obtaining the time-frequency spectrum of non-stationary signals such as speech and music. This method is based on optimal combination of evolutionary spectra that are calculated by using multi-window Gabor expansion ...
Mahmut YALÇIN, Aydın AKAN
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Time–Frequency analysis of localization operators
Journal of Functional Analysis, 2003 Let \(T_x f\) and \(M_\omega f\) denote the translation \(T_x f(t)=f(t-x)\) and the modulation \(M_\omega f (t)=e^{2\pi i\omega t} f(t)\) operators, respectively, and let \(V_g (x, \omega)=\int_{\mathbb{R}^d} f(t)\overline{g(t-x)}e^{-2\pi i\omega t}dt\) denote the short-time Fourier transform of \(f\in {\mathcal S}^\prime (\mathbb{R}^d) \) with respect
Cordero, Elena, Gröchenig, Karlheinz
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