Results 41 to 50 of about 34,299,079 (141)

Time–Frequency Analysis in Rn

, 2021
Funding Information: Vesa Vuojamo is supported by the Vilho, Yrjö and Kalle Väisälä Foundation of the Finnish Academy of Science and Letters. Publisher Copyright: © 2021, The Author(s).A time–frequency transform is a sesquilinear mapping from a suitable ...
Vuojamo, Vesa, Turunen, Ville, Orelma, Heikki   +2 more
core   +1 more source

Alterations in Spectral Attributes of Surface Electromyograms after Utilization of a Foot Drop Stimulator during Post-Stroke Gait

Frontiers in Neurology, 2017
BackgroundA foot drop stimulator (FDS) is a rehabilitation intervention that stimulates the common peroneal nerve to facilitate ankle dorsiflexion at the appropriate time during post-stroke hemiplegic gait. Time–frequency analysis (TFA) of non-stationary
Rakesh Pilkar, Rakesh Pilkar, Arvind Ramanujam, Karen J. Nolan, Karen J. Nolan   +4 more
doaj   +1 more source

QTFN: A General End-to-End Time-Frequency Network to Reveal the Time-Varying Signatures of the Time Series

Big Data Mining and Analytics
Nonstationary time series are ubiquitous in almost all natural and engineering systems. Capturing the time-varying signatures from nonstationary time series is still a challenging problem for data mining.
Tao Chen, Yang Jiao, Lei Xie, Hongye Su
doaj   +1 more source

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

PLoS 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, Pengfei Han, Stefanie Weise, Franziska Hösel, Robert Pellegrino, Thomas Hummel   +5 more
doaj   +1 more source

Gambus Hadhramaut: The Malaysian Malay Lute Tuning Retrieval

BioResources, 2023
This study identified elements in a simple homemade gambus from a local crafter using a scientific approach. The gambus was made from geronggang wood (Cratoxylum arborescens), a light Malaysian hardwood with pink sapwood, distinct from the heartwood with
Sinin Hamdan, Khairul Anwar Mohamad Said, Md. Rezaur Rahman, Marini Sawawi, Aaliyawani Ezzerin Sinin   +4 more
doaj   +2 more sources

Trade-off between responsiveness and noise suppression in biomolecular system responses to environmental cues. [PDF]

PLoS Computational Biology, 2011
When living systems detect changes in their external environment their response must be measured to balance the need to react appropriately with the need to remain stable, ignoring insignificant signals.
Alexander V Ratushny, Ilya Shmulevich, John D Aitchison   +2 more
doaj   +1 more source

Robust Generalized Transient-Extracting Transform for Time–Frequency Feature Extraction

Fractal and Fractional
Time–frequency analysis (TFA) facilitates the extraction of instantaneous frequency (IF) features from non-stationary signals. Transient Extraction Transform (TET) produces highly concentrated time–frequency representations (TFRs) for pulse-like fault ...
Junbo Long, Dongyun Luo, Daifeng Zha, Honglian Wu, Tong Shu, Hongshe Fan   +5 more
doaj   +1 more source

STFT-based multisynchrosqueezing transform using a second-order signal model for seismic data analysis

Scientific Reports
Since time-frequency analysis (TFA) technique can reveal the local properties of seismic signals, it has been widely applied in seismic data analysis.
Bing Pingping, Ma Yabin, Wang Zichun, Jiang Yetao, Liu Wei   +4 more
doaj   +1 more source

KARAKTERISTIK MIKROTREMOR BERDASARKAN ANALISIS SPEKTRUM, ANALISIS TFA (TIME FREQUENCY ANALYSIS) DAN ANALISIS SEISMISITAS PADA KAWASAN JALUR SESAR OPAK MICROTREMOR CHARACTERISTICS BASED ON SPECTRUM ANALYSIS, TIME FREQUENCY ANALYSIS, SEISMICITY ANALYSIS AT OPAK FAULT AREA [PDF]

, 2017
AbstrakTujuan dari penelitian ini adalah mengetahui karakteristik mikrotremor berdasarkan citra TFA dan spektrum dan mengetahui seismisitas menggunakan analisis b-value di sekitar kawasan sesar Opak.
Budi Wibowo, Nugroho, Habibah, Umi, Setiawati, Yuni, Wibowo, Nugroho Budi, Darmawan, Denny, Addawiyah, Rifka   +5 more
core   +1 more source

A choice reaction time analysis of spatial frequency discrimination [PDF]

, 1989
Simple reaction time to the onset of sinewave gratings was measured as a function of spatial frequency in two observers. These results are compared to the choice reaction time required for the observer to correctly discriminate the spatial frequency of ...
Greenlee, Mark W., Breitmeyer, B. G.
core   +1 more source