Results 21 to 30 of about 813 (142)
Ingeniería e Investigación, 2016 This paper presents a time–frequency analysis of the vibration of transformer under direct current (DC) bias through Hilbert–Huang transform (HHT). First, the theory of DC bias for the transformer was analyzed. Next, the empirical mode decomposition (EMD)
Xingmou Liu +3 more
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Fault Diagnosis of HTS–SLIM Based on 3D Finite Element Method and Hilbert–Huang Transform
IEEE Access, 2022 The Linear Induction Motors (LIMs) are a novel structure of industrial motors, which have appeared in recent years. There are various models of optimal LIMs that help better performance. However, no research could be found about the behavior of these motors under the fault conditions.
Ali Ahmadpour +2 more
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Applied Sciences, 2019 The fault frequencies are as they are and cannot be improved. One can only improve its estimation quality. This paper proposes a fault diagnosis method by combining local mean decomposition (LMD) and the ratio correction method to process the short-time ...
Yongqiang Duan +3 more
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Using CNN and HHT to Predict Blood Pressure Level Based on Photoplethysmography and Its Derivatives
Biosensors, 2021 According to the WTO, there were 1.13 billion hypertension patients worldwide in 2015. The WTO encouraged people to check the blood pressure regularly because a large amount of patients do not have any symptoms.
Xiaoxiao Sun +3 more
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Spectral analysis of ultrasonic signals backscartted by mortar: Effect of sand size and temperatures
Materials Letters: X, 2022 This paper presents results of application of Ultrasonic Waves UW in civil engineering. The measurement has been performed by ultrasonic reflection technique using a transducer with central frequency 0,5MHz.
Hicham LOTFI +3 more
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Novel Fourier quadrature transforms and analytic signal representations for nonlinear and non-stationary time-series analysis [PDF]
Royal Society Open Science, 2018 The Hilbert transform (HT) and associated Gabor analytic signal (GAS) representation are well known and widely used mathematical formulations for modelling and analysis of signals in various applications.
Pushpendra Singh
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A harmonic current detection method based on improved HHT
Zhejiang dianliTo resolve the endpoint effects and mode mixing （MM） that arise during harmonic current detection using Hilbert-Huang Transform （HHT）， an improved harmonic current detection method based on HHT is proposed.
ZHANG Weisheng +6 more
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The Journal of Physiology, EarlyView.Abstact figure legend A panoramic 3D optical mapping system was developed, enabling imaging of action potential waves across the entire strongly deforming ventricular surface of beating isolated hearts. The system comprises 12 high‐speed cameras and a soccerball‐shaped imaging chamber with 48 light‐emitting diodes (LEDs).
Shrey Chowdhary +5 more
wiley +1 more source
Energies, 2022 Knowledge of the distinctive frequencies and amplitudes of broken rotor bar (BRB) faults in the induction motor (IM) is essential for most fault diagnosis methods. Fast Fourier transform (FFT) is widely applied to diagnose the faults within BRBs. However,
Seif Eddine Chehaidia +4 more
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Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1916-1928, October 2026.ABSTRACT Purpose Cerebrospinal fluid (CSF) flow oscillations have emerged as a potentially important marker related to brain clearance, but their acquisition often relies on specialized imaging MRI sequences. The purpose of this work was to enable quantitative assessment of CSF flow associated with cardiac, respiratory, and low‐frequency cycles using ...
Pontus Söderström +5 more
wiley +1 more source