Results 1 to 10 of about 1,968,592 (196)
Stress Detection Using Frequency Spectrum Analysis of Wrist-Measured Electrodermal Activity [PDF]
Sensors, 2023 The article deals with the detection of stress using the electrodermal activity (EDA) signal measured at the wrist. We present an approach for feature extraction from EDA. The approach uses frequency spectrum analysis in multiple frequency bands.
Žiga Stržinar +5 more
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Borneo Lute ‘Sape’: The Frequency Spectrum and Time Frequency Analysis (TFA)
BioResources, 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
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Low frequency signal spectrum analysis for strong earthquakes
Annals of Geophysics, 2012 <p>We examined changes in the spectral composition of the low frequency (LF) subionospheric signals from the NRK transmitter (37.5 kHz) in Iceland that were received in Bari (Italy) relative to the earthquake that occurred in L’Aquila on April 6 ...
Masashi Hayakawa +4 more
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Experimental Study on Acoustic Emission Signals Under Different Processing States of Laser-Assisted Machining of SiC Ceramics [PDF]
MicromachinesIn this paper, laser-assisted machining (LAM) of SiC ceramics was taken as the research object, and the different spectrum and energy spectrum characteristics and their changing trends of acoustic emission (AE) signals under processing states of ...
Chen Cao +3 more
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A speed measuring system of hermetic centrifuge [PDF]
ITM Web of Conferences, 2022 Based on the detected vibration signal, a measurement system was designed to solve the current problem of closed centrifuge speed measurement. The system collected and adjusted the signal collected by the vibration sensor, and then send it to the control
Zhang Yifan, Chong Liu
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Frequency spectrum recurrence analysis [PDF]
Scientific Reports, 2020 AbstractIn this paper, we present the new frequency spectrum recurrence analysis technique by means of electro-encephalon signals (EES) analyses. The technique is suitable for time series analysis with noise and disturbances. EES were collected, and alpha waves of the occipital region were analysed by comparing the signals from participants in two ...
Guênia Ladeira +4 more
openaire +4 more sources
Applied Sciences, 2022 To solve the problem of poor steering consistency for each steering wheel of a four-wheel, independent-steering, high-clearance paddy field management machine, given that the true steering angle of the front wheel cannot be directly obtained through the ...
Wenwu Hu +7 more
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IEEE Access, 2023 This paper presents a detailed comparison of eliminated and non-eliminated harmonics for 3-level, 5-level and 13-level cascaded multilevel inverter. For this research, three different types of cascaded H-Bridge multilevel inverters are considered where ...
Umar Tabrez Shami +6 more
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Time-frequency energy analysis of deepwater explosion shock wave signals based on HHT [PDF]
MATEC Web of Conferences, 2021 In order to study the time-frequency characteristics of shock wave signals under deep water explosion conditions, experiments are performed using water medium explosion containers to simulate different water depth conditions, and signal analysis is ...
Li Linna, You Yue
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Can Spectral Power Be Used as a Candidate Seizure Marker of the Periodic Discharges Pattern?
Frontiers in Neurology, 2021 Introduction: It remains controversial whether the periodic discharges (PDs) pattern is an ictal or interictal phenomenon. The aims of the study are to apply time-frequency and power spectrum analysis to study the PDs pattern and prediction of seizures ...
Jianhua Chen +6 more
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