Results 31 to 40 of about 17,339 (180)

Drilling-vibration response characteristics of rocks based on Hilbert–Huang transform

open access: yesJournal of Petroleum Exploration and Production Technology, 2023
Currently, there are no in-situ methods to quantify drilling-vibration response characteristics of different lithologies. Here, we quantified the vibration responses of four lithologies (limestone, sandstone, coal, and mudstone) using a combination of ...
Xinxin Fang   +7 more
doaj   +1 more source

Gear Fault Detection Based on Teager-Huang Transform

open access: yesInternational Journal of Rotating Machinery, 2010
Gear fault detection based on Empirical Mode Decomposition (EMD) and Teager Kaiser Energy Operator (TKEO) technique is presented. This novel method is named as Teager-Huang transform (THT).
Hui Li, Haiqi Zheng, Liwei Tang
doaj   +1 more source

Nonlinear analysis of the electroencephalogram in depth of anesthesia

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2015
Digital signal processing of the electroencephalogram (EEG) became important in monitoring depth of anesthesia (DoA) being used to provide a better anesthetic technique.
Oscar Leonardo Mosquera-Dusan   +3 more
doaj   +1 more source

Hilbert-Huang Transform analysis. [PDF]

open access: yes, 2014
(A) Illustration of a typical single trial of instantaneous frequency in the alpha range and its amplitude derived from the Hilbert-Huang transform of a recorded LFP on the interval −1 to +2 s from stimulus onset.
Rick L. Jenison (137001)
core   +1 more source

Hilbert–Huang Transform Analysis of Quasiperiodic Oscillations in MAXI J1820+070

open access: yesThe Astrophysical Journal, 2023
We present a time-frequency analysis, based on the Hilbert–Huang transform, of the evolution of the low-frequency quasiperiodic oscillations observed in the black hole X-ray binary MAXI J1820+070.
Wei Yu   +16 more
doaj   +1 more source

An Application to Transient Current Signal based Induction Motor Fault Diagnosis of Fourier-Bessel Expansion and Simplified Fuzzy ARTMAP [PDF]

open access: yes, 2013
The start-up transient signals have been widely used for fault diagnosis of induction motor because they can reveal early defects in the development process, which are not easily detected with the signals in the steady state operation. However, transient
Ball, Andrew   +4 more
core   +1 more source

Pulse Signal Analysis Method Based on Improved HHT [PDF]

open access: yesJisuanji gongcheng, 2019
The traditional Hilbert-Huang Transform(HHT) has low accuracy in Empirical Mode Decomposition(EMD) when processing pulse signals,and there are mode mixing problems.In response to this problem,this paper proposes an improved HHT method.Combined with Time ...
KUANG Xue, LI Zhi, WANG Yongjun, ZHANG Shaorong
doaj   +1 more source

Milling gate vibrations analysis via Hilbert-Huang transform

open access: yesITM Web of Conferences, 2017
The study aimed at identification of the milling gate modal parameters: natural frequencies and mode shapes, in order to establish the working range free from resonant areas.
Litak Grzegorz   +2 more
doaj   +1 more source

Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform

open access: yesShock and Vibration, 2021
Aiming to address the problem of pulse-like ground motions being difficult to identify, this paper refines the Baker’s wavelet-based pulse-like ground motions identification method, followed by a new pulse-like ground motion identification method based ...
Zhen Liu
doaj   +1 more source

Analysis of partial discharge signal using the Hilbert-Huang Transform [PDF]

open access: yes, 2006
The development of time-frequency and time-scale transforms has progressed rapidly over the last 20 years. The development and progression of numerical acquisition enable the utilization of these mathematical tools to analyze partial discharge in ...
Russo, Onofrio L.   +6 more
core   +1 more source

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