Resource Type

Journal Article 177

Year

2023 12

2022 8

2021 9

2020 15

2019 12

2018 9

2017 14

2016 11

2015 15

2014 5

2013 3

2012 5

2011 6

2010 5

2009 5

2008 8

2007 6

2006 9

2005 4

2004 4

open ︾

Keywords

empirical study 4

fault diagnosis 4

wavelet analysis 4

Hilbert transform 3

China 2

Copyright protection 2

Fast Fourier transform (FFT) 2

Fourier transform infrared spectroscopy 2

Fourier transform infrared spectroscopy (FTIR) 2

Machine learning 2

acoustic emission 2

index decomposition analysis 2

transform 2

wavelet 2

1H-13C nuclear magnetic resonance (NMR) 1

Adaptive watermarking 1

Air traffic management 1

Air-to-ground channel 1

Algal Extraction 1

open ︾

Search scope:

排序： Display mode:

Identification of faults through wavelet transform vis-à-vis fast Fourier transform of noisy vibration

Deepak PALIWAL,Achintya CHOUDHURY,T. GOVANDHAN

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 130-141 doi: 10.1007/s11465-014-0298-6

Abstract: For this purpose, the performances of envelope detection with fast Fourier transform (FFT) and continuouswavelet transform (CWT) of vibration signals produced from a bearing with defects on inner race andFrequency B spline wavelets have been applied for CWT and a discussion on wavelet selection has been

Keywords： Fault detection     spline wavelet     continuous wavelet transform     fast Fourier transform    

HTML PDF Collect

A Hybrid Neural Network Model for Marine Dissolved Oxygen Concentrations Time-Series Forecasting Based on Multi-Factor Analysis and a Multi-Model Ensemble Article

Hui Liu, Rui Yang, Zhu Duan, Haiping Wu

Engineering 2021, Volume 7, Issue 12,   Pages 1751-1765 doi: 10.1016/j.eng.2020.10.023

Abstract: DO hybrid forecasting model is proposed that includes three stages: multi-factor analysis, adaptive decompositiontemperature, salinity, and oxygen saturation are decomposed adaptively into sub-series by means of the empiricalwavelet transform (EWT) method.Then, five benchmark models are utilized to forecast the sub-series of EWT decomposition.

Keywords： Dissolved oxygen concentrations forecasting     Time-series multi-step forecasting     Multi-factor analysis     Empiricalwavelet transform decomposition     Multi-model optimization ensemble    

HTML PDF Collect

A new acoustic emission source location technique based on wavelet transform and mode analysis

JIAO Jing-pin, HE Cun-fu, WU Bin, FEI Ren-yuan, WANG Xiu-yan

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3,   Pages 341-345 doi: 10.1007/s11465-006-0006-4

Abstract: Based on the wavelet transform and the theory of modal acoustic emission, a new method is proposed toThe wavelet transform is used to resolve the problem.By utilizing the time-frequency data of the wavelet, the frequency-dependent arrival time traveling is

Keywords： s propagation     frequency     emission signal     signal propagation     dispersive    

HTML PDF Collect

Relative vibration identification of cutter and workpiece based on improved bidimensional empirical modedecomposition

Jiasheng LI, Xingzhan LI, Wei WEI, Pinkuan LIU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 227-239 doi: 10.1007/s11465-020-0587-1

Abstract: In this study, the bidimensional empirical mode decomposition (BEMD) method is used to identify suchAccording to Riesz transform theory, a type of isotropic monogenic signal is proposed.The decomposition examples show that the improved BEMD can effectively solve the problem of boundaryThe decomposition results of simulation and experimental surface morphology demonstrate the validity

Keywords： bidimensional empirical mode decomposition     spatial spectrum analysis     boundary effect     vibration identification    

HTML PDF Collect

Adaptive Wavelet Thresholding Denoising Used in Gravitational Signal Processing

Zhao Liye,Zhou Bailing,Li Kunyu

Strategic Study of CAE 2006, Volume 8, Issue 3,   Pages 49-52

Abstract:

The theory of wavelet thresholding denoising is analyzed and applied to process the data measuredTheoretical analysis and emulation experiments indicate that wavelet thresholding denoising, adaptivewavelet thresholding denoising and adaptive Kalman filtering are all effective in alleviating the effectsof different noise, but the performance of adaptive wavelet thresholding denoising is best.

Keywords： gravimeter     signal processing     wavelet transform     adaptive wavelet threshold     adaptive Kalman     filering    

HTML PDF Collect

The Application of Two Dimensions Wavelet in Image Edges Detection

Zhang Hongyan,Zhang Dengpan

Strategic Study of CAE 2003, Volume 5, Issue 4,   Pages 61-64

Abstract: Wavelet transform has the capacity for detecting local signal mutation and detects information usingThis paper analyzes the basic theory using two dimensions wavelet to detect image edges on the basisof wavelet transform and then designs the detecting algorithm of the multi-scale edge matching.

Keywords： wavelet transform     multi-scale     edges detection    

HTML PDF Collect

De-noising of diesel vibration signal using wavelet packet and singular value decomposition

DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 443-447 doi: 10.1007/s11465-006-0055-6

Abstract: Firstly, the effects of vibration-signal de-noising among Fourier transform, wavelet decomposition andwavelet packet decomposition are compared.Secondly, singular value decomposition is applied to de-noising vibration signals.In this method, vibration signals are decomposed by wavelet packet, and the wavelet packet coefficientis de-noised by singular value decomposition again.

Keywords： coefficient     de-noised     cylinder     signal-to-noise     wavelet decomposition    

HTML PDF Collect

Fault diagnosis of spur gearbox based on random forest and wavelet packet decomposition

Diego CABRERA,Fernando SANCHO,René-Vinicio SÁNCHEZ,Grover ZURITA,Mariela CERRADA,Chuan LI,Rafael E. VÁSQUEZ

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 277-286 doi: 10.1007/s11465-015-0348-8

Abstract: The vibration signal’s condition parameters are first extracted by applying the wavelet packetdecomposition with multiple mother wavelets, and the coefficients’ energy content for terminal

Keywords： fault diagnosis     spur gearbox     wavelet packet decomposition     random forest    

HTML PDF Collect

flow regime identification in horizontal tube bundles under vertical upward cross-flow condition using wavelettransform

HUANG Xinghua, WANG Li, JIA Feng

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 333-338 doi: 10.1007/s11708-008-0043-0

Abstract: A wavelet-transform based approach for flow regime identification in horizontal tube bundles under verticalTime series of differential pressure fluctuations were measured and analyzed with discrete wavelet transformThe wavelet energy distributions over scales were found to be appropriate for flow regime identificationBased on the wavelet energy distribution over characteristic scales, a criterion of flow regime identificationThe comparison with experiment results show that it is feasible to use the discrete wavelet transform

Keywords： two-phase     discrete     appropriate     wavelet-transform     criterion    

HTML PDF Collect

Application of Wavelet Transform to Acoustic Radiation and Scattering

Wen Lihua,Ren Xingmin

Strategic Study of CAE 2002, Volume 4, Issue 8,   Pages 63-68

Abstract: In this paper, the new wavelet approaches have been presented for solving acoustic radiation and scatteringboundary quantities are expanded in terms of a basis of the orthogonal wavelets on the interval, and a waveletThen coupled wavelet spectral and finite element method is formulated for solving sound-structure interaction

At the end of the paper, the prospects of the application of wavelet analysis to numerical computation

Keywords： wavelet analysis     acoustic radiation and scattering     structural-acoustic coupling     frequency iteration    

HTML PDF Collect

Study on the Wavelet Packet Transform Method for Fault Diagnosis of Five Roller Orientation Clutch

Hu Binliang,Luo Yixin,Xie Ming

Strategic Study of CAE 2005, Volume 7, Issue 6,   Pages 66-68

Abstract:

The theory and method of wavelet packet decomposition and its energy spectrum dealing with the faultThe characteristic frequency band of the fault can be identified by wavelet packet decomposition and

Keywords： fault diagnosis     wavelet packet     energy spectrum     clutch    

HTML PDF Collect

Variation characteristics of atmospheric methane and carbon dioxide in summertime at a coastal site in the South China Sea

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1574-z

Abstract:

● Diurnal patterns of CH4 and CO2 are clearly extracted using EEMD.

Keywords： Methane     Carbon dioxide     Diurnal pattern     Ensemble empirical mode decomposition     South China Sea     Sea    

HTML PDF Collect

Cutting Forces in High-speed Face-milling of Difficult-to-cut Materials by AR Spectrum Analysis and Wavelet

Long Zhenhai,Wang Xibin,Wang Haochen

Strategic Study of CAE 2004, Volume 6, Issue 10,   Pages 28-31

Abstract: Based on the analysis of cutting regimes, influences on milling force, the spectrum analysis and wavelet

Keywords： difficult-to-cut materials     high speed machining     factorials design     Meyer wavelet transform     Mallat algorithm    

HTML PDF Collect

Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration signals

Zhigen WU, Guohua LIU, Zihua ZHANG

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 112-120 doi: 10.1007/s11709-010-0069-3

Abstract: In addition, a new method was compared with the linear modal-based damage assessment using wavelet transform

Keywords： damage assessment     decay ratio of acceleration signals (DRAS)     wavelet transform (WT)     modal analysis     reinforced    

HTML PDF Collect

Online Monitoring of Welding Status Based on a DBN Model During Laser Welding Article

Yanxi Zhang, Deyong You, Xiangdong Gao, Seiji Katayama

Engineering 2019, Volume 5, Issue 4,   Pages 671-678 doi: 10.1016/j.eng.2019.01.016

Abstract: laser light signal are extracted by decomposing the original signal captured by the photodiode via the waveletpacket decomposition (WPD) method.

Keywords： Online monitoring     Multiple sensors     Wavelet packet decomposition     Deep belief network    

HTML PDF Collect

Title Author Date Type Operation

Identification of faults through wavelet transform vis-à-vis fast Fourier transform of noisy vibration

Deepak PALIWAL,Achintya CHOUDHURY,T. GOVANDHAN

Journal Article

A Hybrid Neural Network Model for Marine Dissolved Oxygen Concentrations Time-Series Forecasting Based on Multi-Factor Analysis and a Multi-Model Ensemble

Hui Liu, Rui Yang, Zhu Duan, Haiping Wu

Journal Article

A new acoustic emission source location technique based on wavelet transform and mode analysis

JIAO Jing-pin, HE Cun-fu, WU Bin, FEI Ren-yuan, WANG Xiu-yan

Journal Article

Relative vibration identification of cutter and workpiece based on improved bidimensional empirical modedecomposition

Jiasheng LI, Xingzhan LI, Wei WEI, Pinkuan LIU

Journal Article

Adaptive Wavelet Thresholding Denoising Used in Gravitational Signal Processing

Zhao Liye,Zhou Bailing,Li Kunyu

Journal Article

The Application of Two Dimensions Wavelet in Image Edges Detection

Zhang Hongyan,Zhang Dengpan

Journal Article

De-noising of diesel vibration signal using wavelet packet and singular value decomposition

DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui

Journal Article

Fault diagnosis of spur gearbox based on random forest and wavelet packet decomposition

Diego CABRERA,Fernando SANCHO,René-Vinicio SÁNCHEZ,Grover ZURITA,Mariela CERRADA,Chuan LI,Rafael E. VÁSQUEZ

Journal Article

flow regime identification in horizontal tube bundles under vertical upward cross-flow condition using wavelettransform

HUANG Xinghua, WANG Li, JIA Feng

Journal Article

Application of Wavelet Transform to Acoustic Radiation and Scattering

Wen Lihua,Ren Xingmin

Journal Article

Study on the Wavelet Packet Transform Method for Fault Diagnosis of Five Roller Orientation Clutch

Hu Binliang,Luo Yixin,Xie Ming

Journal Article

Variation characteristics of atmospheric methane and carbon dioxide in summertime at a coastal site in the South China Sea

Journal Article

Cutting Forces in High-speed Face-milling of Difficult-to-cut Materials by AR Spectrum Analysis and Wavelet

Long Zhenhai,Wang Xibin,Wang Haochen

Journal Article

Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration signals

Zhigen WU, Guohua LIU, Zihua ZHANG

Journal Article

Online Monitoring of Welding Status Based on a DBN Model During Laser Welding

Yanxi Zhang, Deyong You, Xiangdong Gao, Seiji Katayama

Journal Article