Time-Frequency Analysis and Coorbit Spaces of Operators [PDF]
Journal of Mathematical Analysis and Applications, 2022 We introduce an operator valued Short-Time Fourier Transform for certain classes of operators with operator windows, and show that the transform acts in an analogous way to the Short-Time Fourier Transform for functions, in particular giving rise to a ...
Monika Dorfler +3 more
semanticscholar +1 more source
IET Generation, Transmission & Distribution, 2023 Low and medium speed magnetic levitation traffic with short power supply distance and complex grounding network structure, prone to power supply rail grounding faults. However, the existing fault location methods do not accurately locate the fault point,
Ningning Yan, Jian Wang, Qingmin Li
doaj +1 more source
A general theory on frequency and time–frequency analysis of irregularly sampled time series based on projection methods – Part 2: Extension to time–frequency analysis [PDF]
Nonlinear Processes in Geophysics, 2018 Geophysical time series are sometimes sampled irregularly along the time axis. The situation is particularly frequent in palaeoclimatology. Yet, there is so far no general framework for handling the continuous wavelet transform when the time sampling ...
G. Lenoir, M. Crucifix, M. Crucifix
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A general theory on frequency and time–frequency analysis of irregularly sampled time series based on projection methods – Part 1: Frequency analysis [PDF]
Nonlinear Processes in Geophysics, 2018 We develop a general framework for the frequency analysis of irregularly sampled time series. It is based on the Lomb–Scargle periodogram, but extended to algebraic operators accounting for the presence of a polynomial trend in the model for the data,
G. Lenoir, M. Crucifix, M. Crucifix
doaj +1 more source
Audible noise analysis of 750‐kV AC transmission line in high‐altitude area under different weather
IET Generation, Transmission & Distribution, 2023 In order to build UHV AC transmission lines at high altitudes, it is necessary to analyze the audible noise (AN) characteristics of the existing EHV transmission lines at high‐altitude areas to guide the design.
Yemao Zhang +4 more
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Time‐frequency synchroextracting transform
IET Signal Processing, 2022 The study proposes a novel time‐frequency analysis technique, titled time‐frequency synchroextracting transform which enhances the accuracy of synchroextracting transform.
Ran Zhang +6 more
doaj +1 more source
Active jamming recognition based on bilinear EfficientNet and attention mechanism
IET Radar, Sonar & Navigation, 2021 As electromagnetic environments are increasingly complex, there are more kinds of radar jamming signals. Active jamming recognition has problems of the low recognition accuracy and the high computational complexity, especially under a low jamming‐to ...
Yihan Xiao +3 more
doaj +1 more source
Time-Frequency Analysis of Scalp EEG With Hilbert-Huang Transform and Deep Learning
IEEE journal of biomedical and health informatics, 2021 Electroencephalography (EEG) is a brain imaging approach that has been widely used in neuroscience and clinical settings. The conventional EEG analyses usually require pre-defined frequency bands when characterizing neural oscillations and extracting ...
Jingyi Zheng +6 more
semanticscholar +1 more source
Time‐frequency characterisation of bistatic Doppler signature of a wooded area walk at L‐band
IET Radar, Sonar & Navigation, 2021 The Doppler signature of a man walking in a forested area analysed at L‐band is presented here. The aim is twofold: to assess the best time‐frequency distribution to characterise the activity; to highlight the similarity of the simulated data to the ...
Giovanni Manfredi +5 more
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Time-Frequency Analysis of EEG Signals and GLCM Features for Depth of Anesthesia Monitoring
Computational Intelligence and Neuroscience, 2021 One of the important tasks in the operating room is monitoring the depth of anesthesia (DoA) during surgery, and noninvasive techniques are very popular.
Seyed Mortaza Mousavi +2 more
semanticscholar +1 more source