Results 11 to 20 of about 2,678,584 (258)

F-Value Time-Frequency Analysis: Between-Within Variance Analysis [PDF]

open access: yesFrontiers in Neuroscience, 2021
Studies on brain mechanisms enable us to treat various brain diseases and develop diverse technologies for daily life. Therefore, an analysis method of neural signals is critical, as it provides the basis for many brain studies.
Hong Gi Yeom, Hyundoo Jeong
doaj   +2 more sources

Enhancing Time-Frequency Analysis with Zero-Mean Preprocessing [PDF]

open access: yesSensors, 2022
Side-channel analysis is a critical threat to cryptosystems on the Internet of Things and in relation to embedded devices, and appropriate side-channel countermeasure must be required for physical security.
Sunghyun Jin   +3 more
doaj   +2 more sources

Exploring neural mechanisms of gender differences in bodily emotion recognition: a time-frequency analysis and network analysis study [PDF]

open access: yesFrontiers in Neuroscience
BackgroundThis study aimed to explore the neural mechanisms underlying gender differences in recognizing emotional expressions conveyed through body language.
Tingwei Feng   +4 more
doaj   +2 more sources

Estimating instantaneous frequency of multicomponent signal using optimization strategy in fractional domain

open access: yesElectronics Letters, 2023
Estimating instantaneous frequencies (IFs) overlapped in both time and frequency domains is an important issue in time‐frequency (TF) analysis. In this letter, the TF information of the signal in fractional domain is combined with an optimization ...
Liyun Xu, Wei Li
doaj   +1 more source

Time-frequency analysis of tremors [PDF]

open access: yesBrain, 1998
Time-frequency analysis methods were applied to surface EMG records of patients with tremor. Variation in tremor frequency over time and between muscles was measured in subjects with Parkinson's disease (n = 20), essential tremor (n = 8) and psychogenic tremor (n = 7).
P E, O'Suilleabhain, J Y, Matsumoto
openaire   +2 more sources

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]

open access: yesNonlinear 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
doaj   +1 more source

A general theory on frequency and time–frequency analysis of irregularly sampled time series based on projection methods – Part 1: Frequency analysis [PDF]

open access: yesNonlinear 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

Feature Extraction Methods for Electroretinogram Signal Analysis: A Review

open access: yesIEEE Access, 2021
Feature extraction is an essential aspect of electroretinogram (ERG) signal analysis. The extracted features are beneficial to analyze the signal further and compress the signal for storage or transmission purposes.
Soroor Behbahani   +2 more
doaj   +1 more source

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   +1 more source

Borneo Lute ‘Sape’: The Frequency Spectrum and Time Frequency Analysis (TFA)

open access: yesBioResources, 2023
Sound elements were studied for a six strings sape, a traditional instrument. The frequency was evaluated using a frequency spectrum and a time frequency plane. PicoScope oscilloscopes and Adobe Audition version 3 were used to record the acoustic spectra.
Sinin Hamdan   +4 more
doaj   +2 more sources

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