Results 11 to 20 of about 42,446 (256)

Identification of detailed time-frequency components in somatosensory evoked potentials [PDF]

, 2010
Somatosensory evoked potential (SEP) usually contains a set of detailed temporal components measured and identified in time domain, providing meaningful information on physiological mechanisms of the nervous system. The purpose of this study is to reveal
Hu, Y, Luk, KDK, Zhang, Z
core   +1 more source

A Method of DC Arc Detection in All-Electric Aircraft

Energies, 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

Local polynomial modeling of time-varying autoregressive models with application to time-frequency analysis of event-related EEG [PDF]

, 2011
This paper proposes a new local polynomial modeling (LPM) method for identification of time-varying autoregressive (TVAR) models and applies it to time-frequency analysis (TFA) of event-related electroencephalogram (ER-EEG).
Chan, SC, Hung, YS, Zhang, ZG
core   +1 more source

A Frequency Estimation Scheme Based on Gaussian Average Filtering Decomposition and Hilbert Transform: With Estimation of Respiratory Rate as an Example

Sensors, 2023
Frequency estimation plays a critical role in vital sign monitoring. Methods based on Fourier transform and eigen-analysis are commonly adopted techniques for frequency estimation.
Yue-Der Lin, Yong-Kok Tan, Tienhsiung Ku, Baofeng Tian   +3 more
doaj   +1 more source

Are all RR Lyrae stars modulated? [PDF]

, 2018
We analyzed 151 variables previously classified as fundamental mode RR Lyrae stars from Campaigns 01-04 of the Kepler two wheel (K2) archive. By employing a method based on the application of systematics filtering with the aid of co-trending light curves
Kovacs, Geza
core   +2 more sources

HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field [PDF]

, 2009
We report on the discovery of HAT-P-11b, the smallest radius transiting extrasolar planet (TEP) discovered from the ground, and the first hot Neptune discovered to date by transit searches.
A. Howard, A. Moór, A. Pál, B. Sipőcz, Bakos, Bakos, Baraffe, Baraffe, Brown, Burrows, Butler, Carpenter, Carter, Charbonneau, Charbonneau, Charbonneau, D. A. Fischer, D. D. Sasselov, D. W. Latham, Demarque, Deming, Fabrycky, Fischer, Ford, Ford, Fortney, G. A. Esquerdo, G. Torres, G. W. Marcy, G. Á. Bakos, Gray, Gray, Gábor Kovács, Géza Kovács, H. Isaacson, Henry, I. Papp, J. A. Johnson, J. Fernandez, J. Hartman, J. Lázár, Johnson, Johnson, Kjeldsen, Latham, Latham, Mandel, Matsumura, Mayor, McArthur, Monet, O'Donovan, P. Sári, Perryman, Press, Pál, R. P. Butler, R. P. Stefanik, R. W. Noyes, Rafikov, Ramírez, Ribas, Rivera, S. Vogt, Sato, Seager, Silva-Valio, Skrutskie, Sozzetti, Tingley, Torres, Torres, Torres, Valencia, Valenti, Winn, Winn, Yi   +77 more
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Robust sparse time‐frequency analysis for data missing scenarios

IET 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   +1 more source

Deep learning-based LPI radar signals analysis and identification using a Nyquist Folding Receiver architecture

Defence Technology, 2023
Nyquist Folding Receiver (NYFR) is a perceptron structure that realizes a low probability of intercept (LPI) signal analog to information. Aiming at the problem of LPI radar signal receiving, the time domain, frequency domain, and time-frequency domain ...
Tao Wan, Kai-li Jiang, Hao Ji, Bin Tang
doaj   +1 more source

Microwave-assisted YBa2Cu3O7 precursors : a fast and reliable method towards chemical precursors for superconducting films [PDF]

, 2017
Highly stable, pure, and anhydrous organometallic YBa2Cu3O7- (YBCO) precursor solutions were prepared by dissolving commercial YBCO powder in acetone by trifluoroacetic anhydride (TFAA) or a mixture of TFAA with propionic acid for low fluorine precursors.
Bennewitz, Jan, Bäcker, Michael, De Keukeleere, Katrien, De Roo, Jonathan, Lynen, Frederic, Pollefeyt, Glenn, Rijckaert, Hannes, Roeleveld, Kevin, Van Driessche, Isabel   +8 more
core   +1 more source

Time-feature attention-based convolutional auto-encoder for flight feature extraction

Scientific Reports, 2023
Quick Access Recorders (QARs) provide an important data source for Flight Operation Quality Assurance (FOQA) and flight safety. It is generally characterized by large volume, high-dimensionality and high frequency, and these features result in extreme ...
Qixin Wang, Kun Qin, Binbin Lu, Huabo Sun, Ping Shu   +4 more
doaj   +1 more source