WAVELET ANALYSIS FOR PROCESSING OF EARTHQUAKE RECORDS

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HEYDARI ALI; JALILI D.

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Paper Information

Journal: MODARES TECHNICAL AND ENGINEERING Year:2008 | Volume:- | Issue:33 (SPECIAL ISSUE ON CIVIL ENGINEERING) Page(s): 109-118

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Information Journal Paper

Title

WAVELET ANALYSIS FOR PROCESSING OF EARTHQUAKE RECORDS

Author(s)

HEYDARI ALI | JALILI D. | Issue Writer Certificate

Keywords

CONTINUOUS WAVELET TRANSFORMQ3

FOURIER TRANSFORMQ2

EARTHQUAKE RECORDSQ3

TIME-FREQUENCY REPRESENTATIONQ3

Abstract

Wavelet transform (WT) is a relatively new mathematical tool that does not have disadvantages of the FOURIER TRANSFORM (FT). In recent years enormous interest on its applications in the solution of problems in engineering has been observed. This technique is particularly suitable for non-stationary processes for which FT is useless. The WT allows exceptional localization both in time and frequency domains. This technique has been successfully implemented in signal and image processing, solution of differential equations, numerical analysis, dynamic analysis and other fields. The CONTINUOUS WAVELET TRANSFORM (CWT) of a signal can represent the time and frequency domain content at the same time. In the WT the use of a fully scalable window solves the signal-cutting problem. The window is shifted along the signal, and for every shift the spectrum is calculated. This process is repeated with a slightly shorter (or longer) window for every new cycle. At the end of the process, we have a collection of TIME-FREQUENCY REPRESENTATIONs of the signal, all with different resolutions. The CWT is used for decomposition of EARTHQUAKE RECORDS in time-frequency localization. The CWT shows the time of occurrence for each frequency component in the EARTHQUAKE RECORDS. Numerical results show that this approximation is a powerful technique and the error involved in CWT is small. A number of earthquakes have been decomposed and the results are compared with that of the fast FOURIER TRANSFORM (FFT) method.

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APA: Copy

HEYDARI, ALI, & JALILI, D.. (2008). WAVELET ANALYSIS FOR PROCESSING OF EARTHQUAKE RECORDS. MODARES TECHNICAL AND ENGINEERING, -(33 (SPECIAL ISSUE ON CIVIL ENGINEERING)), 109-118. SID. https://sid.ir/paper/25016/en

Vancouver: Copy

HEYDARI ALI, JALILI D.. WAVELET ANALYSIS FOR PROCESSING OF EARTHQUAKE RECORDS. MODARES TECHNICAL AND ENGINEERING[Internet]. 2008;-(33 (SPECIAL ISSUE ON CIVIL ENGINEERING)):109-118. Available from: https://sid.ir/paper/25016/en

IEEE: Copy

ALI HEYDARI, and D. JALILI, “WAVELET ANALYSIS FOR PROCESSING OF EARTHQUAKE RECORDS,” MODARES TECHNICAL AND ENGINEERING, vol. -, no. 33 (SPECIAL ISSUE ON CIVIL ENGINEERING), pp. 109–118, 2008, [Online]. Available: https://sid.ir/paper/25016/en

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