Results 11 to 20 of about 2,232,474 (242)
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
core +1 more source
An optical fibre-based frequency dissemination network for Australia
, 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
core +2 more sources
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
core +1 more source
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
core +1 more source
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
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
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
Classification of EEG Signals Using Adaptive Time-Frequency Distributions
Metrology and Measurement Systems, 2016 Time-Frequency (t-f) distributions are frequently employed for analysis of new-born EEG signals because of their non-stationary characteristics. Most of the existing time-frequency distributions fail to concentrate energy for a multicomponent signal ...
Khan Nabeel A., Ali Sadiq
doaj +1 more source
Real-time updating of the flood frequency distribution through data assimilation [PDF]
Hydrology and Earth System Sciences, 2017 We explore the memory properties of catchments for predicting the likelihood of floods based on observations of average flows in pre-flood seasons.
C. Aguilar, A. Montanari, M.-J. Polo
doaj +1 more source