Results 1 to 10 of about 2,783,355 (120)

Feature Extraction Methods for Electroretinogram Signal Analysis: A Review

open access: yesIEEE Access, 2021
Feature extraction is an essential aspect of electroretinogram (ERG) signal analysis. The extracted features are beneficial to analyze the signal further and compress the signal for storage or transmission purposes.
Soroor Behbahani   +2 more
doaj   +1 more source

Time Domain Analysis of NB-IoT Signals

open access: yesApplied Sciences, 2023
The NB-IoT (NarrowBand-Internet of Things) radio technology is now widely implemented by mobile phone network operators to support the communication of IoT devices such as smart meters, insurance black boxes for cars, network connected waste bins, smart ...
Andrea Barellini   +3 more
doaj   +1 more source

Time and Frequency Domain Dynamic Analysis of Offshore Mooring

open access: yesJournal of Marine Science and Engineering, 2021
The numerical procedures for dynamic analysis of mooring lines in the time domain and frequency domain were developed in this work. The lumped mass method was used to model the mooring lines. In the time domain dynamic analysis, the modified Euler method
Shi He, Aijun Wang
doaj   +1 more source

Time-Domain Implementation and Analyses of Multi-Motion Modes of Floating Structures

open access: yesJournal of Marine Science and Engineering, 2022
The study of wave-structure interactions involving nonlinear forces would often make use of the popular hybrid frequency–time domain method. In the hybrid method, the frequency-domain analysis could firstly provide the reliable and accurate dynamic ...
Wanan Sheng   +6 more
doaj   +1 more source

Time Domain Characteristic Mode Analysis for Transmission Problems

open access: yesIEEE Open Journal of Antennas and Propagation, 2020
Characteristic mode analysis (CMA) is based on time-harmonic electromagnetics and applied mostly in frequency domain. In this paper, CMA is extended to time domain (TD) for transmission problems. Based on the modal self- and mutual-admittance of two-port
Qi Wu, Zhongkui Wen
doaj   +1 more source

Harmonic analysis based on time domain mutual-multiplication window

open access: yesJournal of Modern Power Systems and Clean Energy, 2016
The signal spectral leakage and fence effect are prone to take place during the power harmonic analysis by fast fourier transform (FFT) under asynchronous sampling. The inhibiting ability of classical window functions is restricted by side-lobe behaviors.
Tianyuan Tan   +5 more
doaj   +1 more source

Automatic Multichannel Volcano-Seismic Classification Using Machine Learning and EMD

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
This article proposes the design of an automatic classifier using the empirical mode decomposition (EMD) along with machine learning techniques for identifying the five most important types of events of the Ubinas volcano, the most active volcano in Peru.
Pablo Eduardo Espinoza Lara   +6 more
doaj   +1 more source

On the Time Domain Error Caused By the Frequency Domain Sampling Rate in a Reverberation Chamber

open access: yesIEEE Access, 2019
The time domain (TD) response of a reverberation chamber (RC) can be obtained from the inverse Fourier transform of the measured S-parameters in the frequency domain (FD).
Jianhua Xu, Yongjiu Zhao, Qian Xu
doaj   +1 more source

SURVEY OF GEAR FAULT DIAGNOSIS USING VARIOUS STATISTICAL SIGNALS PARAMETERS [PDF]

open access: yesJournal of the Egyptian Society of Tribology, 2022
Gears are critical components of industrial equipment, where gear failure results machinery failure and that consider as a significant reduction in productivity. It is always critical to keep track of the machine's health in time.
D. Y. Samuel, A. Nabhan, M. O. Mousa
doaj   +1 more source

Preparation and electrochemical noise characteristics of graphene-composite coating with different contents of 7A52 aluminum alloy matrix

open access: yes工程科学学报, 2018
In the harsh marine environment, the traditional aluminum alloy coating has difficulty meeting the requirements of use, which can affect equipment performance.
SUN Xiao-feng   +4 more
doaj   +1 more source

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