Evolutionary Spectra Estimation of Field Measurement Typhoon Processes Using Wavelets
Joint Authors
Li, Aiqun
Zhou, Guang-Dong
Ding, You-Liang
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-03-02
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
This paper presents a wavelet-based method for estimating evolutionary power spectral density (EPSD) of nonstationary stochastic oscillatory processes and its application to field measured typhoon processes.
The EPSD, which is deduced in a closed form based on the definition of the EPSD and the algorithm of the continuous wavelet transform, can be formulated as a sum of squared moduli of the wavelet functions in time domain modulated by frequency-dependent coefficients that relate to the squared values of wavelet coefficients and two wavelet functions with different time shifts.
A parametric study is conducted to examine the efficacy of the wavelet-based estimation method and the accuracy of different wavelets.
The results indicate that all of the estimated EPSDs have acceptable accuracy in engineering application and the Morlet transform can provide desirable estimations in both time and frequency domains.
Finally, the proposed method is adopted to investigate the time-frequency characteristics of the Typhoon Matsa measured in bridge site.
The nonstationary energy distribution and stationary frequency component during the whole process are found.
The work in this paper may promote an improved understanding of the nonstationary features of typhoon winds.
American Psychological Association (APA)
Zhou, Guang-Dong& Ding, You-Liang& Li, Aiqun. 2015. Evolutionary Spectra Estimation of Field Measurement Typhoon Processes Using Wavelets. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1075138
Modern Language Association (MLA)
Zhou, Guang-Dong…[et al.]. Evolutionary Spectra Estimation of Field Measurement Typhoon Processes Using Wavelets. Mathematical Problems in Engineering No. 2015 (2015), pp.1-10.
https://search.emarefa.net/detail/BIM-1075138
American Medical Association (AMA)
Zhou, Guang-Dong& Ding, You-Liang& Li, Aiqun. Evolutionary Spectra Estimation of Field Measurement Typhoon Processes Using Wavelets. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1075138
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1075138