Results 21 to 30 of about 6,742,308 (298)

Neural Oscillation Associated with Contagious Itch in Patients with Atopic Dermatitis

open access: yesBrain Sciences, 2021
Objective: Itch is an unpleasant sensation associated with an urge to scratch and is a major health care issue associated with atopic dermatitis (AD). Contagious itch, i.e., subjective feelings of itchiness induced by watching others’ scratching behavior,
In-Seon Lee   +6 more
doaj   +1 more source

Frequency-Domain Analysis of Linear Time-Periodic Systems [PDF]

open access: yes, 2004
In this paper, we study convergence of truncated representations of the frequency-response operator of a linear time-periodic system. The frequency-response operator is frequently called the harmonic transfer function. We introduce the concepts of input,
Bernhardsson, Bo   +2 more
core   +1 more source

Bayesian Lattice Filters for Time-Varying Autoregression and Time-Frequency Analysis [PDF]

open access: yes, 2014
Modeling nonstationary processes is of paramount importance to many scientific disciplines including environmental science, ecology, and finance, among others.
Holan, Scott H.   +2 more
core   +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 on the adeles over the rationals [PDF]

open access: yes, 2018
We show that the construction of Gabor frames in $L^{2}(\mathbb{R})$ with generators in $\mathbf{S}_{0}(\mathbb{R})$ and with respect to time-frequency shifts from a rectangular lattice $\alpha\mathbb{Z}\times\beta\mathbb{Z}$ is equivalent to the ...
Enstad, Ulrik B. R.   +2 more
core   +4 more sources

Nonparametric frequency domain analysis of nonstationary multivariate time series [PDF]

open access: yes, 2002
We analyse the properties of nonparametric spectral estimates when applied to long memory and trending nonstationary multiple time series. We show that they estimate consistently a generalized or pseudo-spectral density matrix at frequencies both close ...
Velasco, Carlos
core   +3 more sources

Global testing against sparse alternatives in time-frequency analysis [PDF]

open access: yes, 2016
In this paper, an over-sampled periodogram higher criticism (OPHC) test is proposed for the global detection of sparse periodic effects in a complex-valued time series.
Cai, T. Tony   +2 more
core   +3 more sources

Harmonic analysis of AC-bus voltage in converter station based on time–frequency transformation

open access: yesThe Journal of Engineering, 2018
The disturbance of the AC system has become one of the main causes of commutation failure in the high voltage direct current (HVDC) transmission system. Here, the time–frequency transformation method is used to analyse the AC-bus voltage disturbance from
Zhao Dandan   +6 more
doaj   +1 more source

EEG-Based Seizure Detection Using Variable-Frequency Complex Demodulation and Convolutional Neural Networks

open access: yesSignals, 2023
Epilepsy is a complex neurological disorder characterized by recurrent and unpredictable seizures that affect millions of people around the world. Early and accurate epilepsy detection is critical for timely medical intervention and improved patient ...
Yedukondala Rao Veeranki   +2 more
doaj   +1 more source

Effect of sparsity-aware time–frequency analysis on dynamic hand gesture classification with radar micro-Doppler signatures [PDF]

open access: yes, 2018
Dynamic hand gesture recognition is of great importance in human-computer interaction. In this study, the authors investigate the effect of sparsity-driven time-frequency analysis on hand gesture classification.
Fioranelli, Francesco   +3 more
core   +1 more source

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