Results 11 to 20 of about 16,827 (243)

Robust sparse time‐frequency analysis for data missing scenarios

open access: yesIET 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
doaj   +2 more sources

Temporal and Spatial Dynamics of Different Interictal Epileptic Discharges: A Time-Frequency EEG Approach in Pediatric Focal Refractory Epilepsy

open access: yesFrontiers in Neurology, 2020
Objective: Characterization of the spatial and temporal dynamics of interictal epileptic discharges (IED) using time-frequency analysis (TFA) and electrical-source localization (ESL).Methods: TFA was performed on IED (spikes, spike waves, and polyspike ...
Younes Jabran   +7 more
doaj   +2 more sources

Objective Extraction of Evoked Event-Related Oscillation from Time-Frequency Representation of Event-Related Potentials

open access: yesNeural Plasticity, 2020
Evoked event-related oscillations (EROs) have been widely used to explore the mechanisms of brain activities for both normal people and neuropsychiatric disease patients. In most previous studies, the calculation of the regions of evoked EROs of interest
Guanghui Zhang, Xueyan Li, Fengyu Cong
doaj   +2 more sources

Time frequency analysis of olfactory induced EEG-power change. [PDF]

open access: yesPLoS ONE, 2017
The objective of the present study was to investigate the usefulness of time-frequency analysis (TFA) of olfactory-induced EEG change with a low-cost, portable olfactometer in the clinical investigation of smell function.A total of 78 volunteers ...
Valentin Alexander Schriever   +5 more
doaj   +3 more sources

Synchrosqueezing Transform Based on Frequency-Domain Gaussian-Modulated Linear Chirp Model for Seismic Time–Frequency Analysis

open access: yesMathematics, 2023
The synchrosqueezing transform (SST) has attracted much attention as a post-processing technique since it was proposed. In recent years, improvements to SST have been made.
Pingping Bing   +6 more
doaj   +2 more sources

IP Controller Design for Uncertain Two-Mass Torsional System Using Time-Frequency Analysis

open access: yesShock and Vibration, 2018
With the development of industrial production, drive systems are demanded for larger inertias of motors and load machines, whereas shafts should be lightweight.
Jing Cui, Jiayu Ye, Zhongyi Chu
doaj   +2 more sources

The frequency spectrum and time frequency analysis of different violins classification as tools for selecting a good-sounding violin [PDF]

open access: yes, 2021
This work evaluates four violins from three distinct manufacturers, notably Eurostring, Stentor, and Suzuki, using a scientific approach. Eurostring1 and Eurostring2 were the names given to the two Eurostring units.
Othman, Saiful Hairi   +3 more
core   +3 more sources

A Novel Method for Bearing Fault Diagnosis under Variable Speed Based on Envelope Spectrum Fault Characteristic Frequency Band Identification

open access: yesSensors, 2023
Rolling element bearing (REB) vibration signals under variable speed (VS) have non-stationary characteristics. Order tracking (OT) and time-frequency analysis (TFA) are two widely used methods for REB fault diagnosis under VS.
Di Pei, Jianhai Yue, Jing Jiao
doaj   +1 more source

Time Frequency Analysis of Peking Gamelan [PDF]

open access: yes, 2020
The tone of peking 1, 2, 3, 5, 6, 1’ was investigated using time-frequency analysis (TFA). The frequencies were measured using PicoScope oscilloscope, Melda analyzer in Cubase version 9 and Adobe version 3. Three different approaches for time-frequency
Marini, Sawawi   +3 more
core   +2 more sources

A Method of DC Arc Detection in All-Electric Aircraft

open access: yesEnergies, 2020
Arc faults in an aircraft’s power distribution system (PDS) often leads to cable and equipment damage, which seriously threatens the personal safety of the passengers and pilots.
Teng Li, Zhijie Jiao, Lina Wang, Yong Mu
doaj   +1 more source

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