Results 11 to 20 of about 2,238,481 (242)
An optical fibre-based frequency dissemination network for Australia [PDF]
, 2011 An optical-fibre network is being planned for distribution of optical and microwave reference frequencies in Australia. This network would connect a number of research facilities and the National Measurement Institute (NMI), allowing long-range ...
Luiten, A. +9 more
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Time-Frequency Analysis of Systems with Changing Dynamic Properties [PDF]
, 2006 The Wigner-Ville Distribution, and related refinements, represent a class of advanced time-frequency analysis tools that are distinguished from Fourier and wavelet methods by an increase in resolution in the time frequency plane. Time-frequency analysis
Bradford, Samuel Case, V +1 more
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A high-resolution quadratic time-frequency distribution for multicomponent signals analysis [PDF]
, 2001 The paper introduces a new kernel for the design of a high resolution time-frequency distribution (TED). We show that this distribution can solve problems that the Wigner-Ville distribution (WVD) or the spectrogram cannot.
Boashash, Boualem +3 more
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Adaptive noise cancelling and time–frequency techniques for rail surface defect detection [PDF]
, 2015 Adaptive noise cancelling (ANC) is a technique which is very effective to remove additive noises from the contaminated signals. It has been widely used in the fields of telecommunication, radar and sonar signal processing.
Liang, B. +11 more
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Railway wheel-flat and rail surface defect modelling and analysis by time–frequency techniques [PDF]
, 2013 Damage to the surface of railway wheels and rails commonly occurs in most railways. If not detected, it can result in rapid deterioration and possible failure of rolling stock and infrastructure components causing higher maintenance costs.
Liang, B. +7 more
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A Novel Signal Separation Method Based on Improved Sparse Non-Negative Matrix Factorization
Entropy, 2019 In order to separate and extract compound fault features of a vibration signal from a single channel, a novel signal separation method is proposed based on improved sparse non-negative matrix factorization (SNMF).
Huaqing Wang +4 more
doaj +1 more source
Speech Enhancement Based on Time-Frequency Domain GAN [PDF]
Jisuanji kexue, 2022 The traditional speech enhancement algorithm based on generative adversarial networks (SEGAN) enhances speech in the time domain,and completely ignores the distribution of speech samples in frequency domain.Under the condition of low signal-to-noise ...
YIN Wen-bing, GAO Ge, ZENG Bang, WANG Xiao, CHEN Yi
doaj +1 more source
Advanced Composites Letters, 2020 The physical meaning of phase difference controls the occurrence time of peak values of triangular series, which can be abbreviated as peak arrival time.
Xu Han, Yunan Liu, Lihua Wang
doaj +1 more source
Remote Sensing, 2023 The extraction of the micro-Doppler (m-D) feature based on time-frequency distribution (TFD) is of great significance for target detection and identification.
Yang Yang +4 more
doaj +1 more source
Signal enhancement by time-frequency peak filtering [PDF]
, 2003 Time-frequency peak filtering (TFPF) allows the reconstruction of signals from observations corrupted by additive noise by encoding the noisy signal as the instantaneous frequency (IF) of a frequency modulated (FM) analytic signal.
Boashash, Boualem +3 more
core +1 more source