Results 11 to 20 of about 13,696 (250)

Morlet Wavelet UDWT Denoising and EMD based Bearing Fault Diagnosis [PDF]

open access: yesElectronics, 2013
Bearing Faults in rotating machinery occur as low energy impulses in their vibration signal and are lost in the noise. This signal has to be properly denoised before analyzing for effective condition monitoring.
A. Santhana Raj, N. Murali
doaj   +1 more source

Investigations on the Performance of a New Grounding Device with Spike Rods under High Magnitude Current Conditions

open access: yesEnergies, 2019
In many publications, the characteristics of practical earthing systems were investigated under conditions involving fast-impulse currents of different magnitudes by field measurements.
Abdul Wali Abdul Ali   +4 more
doaj   +1 more source

Dynamics of Propagation of Premature Impulses in Structurally Remodeled Infarcted Myocardium: A Computational Analysis

open access: yesFrontiers in Physiology, 2014
Initiation of cardiac arrhythmias typically follows one or more premature impulses either occurring spontaneously or applied externally. In this study, we characterize the dynamics of propagation of single (S2) and double premature impulses (S3), and the
Candido eCabo
doaj   +1 more source

Free and Wire-Guided Spark Discharges in Water: Pre-Breakdown Energy Losses and Generated Pressure Impulses

open access: yesEnergies, 2023
Impulsive underwater discharges have been investigated for many decades, yet the complex pre-breakdown processes that underpin their development are not fully understood.
Yifan Chai   +4 more
doaj   +1 more source

Respiratory brain impulse propagation in focal epilepsy

open access: yesScientific Reports, 2023
Respiratory brain pulsations pertaining to intra-axial hydrodynamic solute transport are markedly altered in focal epilepsy. We used optical flow analysis of ultra-fast functional magnetic resonance imaging (fMRI) data to investigate the velocity ...
Ahmed Elabasy   +9 more
doaj   +1 more source

A Novel Power Transformer Condition Monitoring System Based on Wide-Band Measurement of Core Earth Signals and Correlation Analysis With Multi-Source Data

open access: yesIEEE Access, 2019
On-line condition monitoring and real-time fault detection are essential to protect power transformers from unscheduled outage of services. The core earth signals (CES) are valuable for fault detection and diagnosis of power transformers, as they are ...
Xuezhi Ke   +3 more
doaj   +1 more source

A Centrifugal Pump Fault Diagnosis Framework Based on Supervised Contrastive Learning

open access: yesSensors, 2022
A novel intelligent centrifugal pump (CP) fault diagnosis method is proposed in this paper. The method is based on the contrast in vibration data obtained from a centrifugal pump (CP) under several operating conditions.
Sajjad Ahmad   +2 more
doaj   +1 more source

A fast Na+/Ca2+-based action potential in a marine diatom. [PDF]

open access: yesPLoS ONE, 2009
BACKGROUND:Electrical impulses in animals play essential roles in co-ordinating an array of physiological functions including movement, secretion, environmental sensing and development.
Alison R Taylor
doaj   +1 more source

Effects of ATP on Time Parameters of Contractility of Rats’ Slow and Fast Skeletal Muscles in Normal and Hypothermic Conditions

open access: yesMuscles, 2023
We have previously shown that hypothermia leads to an increase in the synaptic modulating effects of ATP but not of adenosine in several different animal skeletal muscles.
Adel E. Khairullin   +3 more
doaj   +1 more source

From ECG signals to images: a transformation based approach for deep learning [PDF]

open access: yesPeerJ Computer Science, 2021
Provocative heart disease is related to ventricular arrhythmias (VA). Ventricular tachyarrhythmia is an irregular and fast heart rhythm that emerges from inappropriate electrical impulses in the ventricles of the heart. Different types of arrhythmias are
Mahwish Naz   +5 more
doaj   +2 more sources

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