000010755 001__ 10755
000010755 005__ 20141205155800.0
000010755 04107 $$aeng
000010755 046__ $$k2008-10-12
000010755 100__ $$aLiu, Lanbo
000010755 24500 $$aApplications of the Hilbert-Huang Transform to Microtremor Data Analysis Enhancement

000010755 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010755 260__ $$b
000010755 506__ $$arestricted
000010755 520__ $$2eng$$aIn this paper we discuss the use of the Hilbert-Huang transform (HHT) to enhance the time-frequency analysis of microtremor measurements. HHT is a powerful algorithm that combines the process of empirical mode decomposition (EMD) and the Hilbert transform to compose the Hilbert-Huang spectrum that contains the time-frequency information of the recorded signals. HHT is essentially an empirical algorithm and does not require the signals to be linear or stationary. HHT is advantageous to analyzing microtremor data, since observed microtremors are commonly contaminated by non-stationary transient noises close to the recording instruments. This is especially true when microtremors are measured in an urban environment. In this paper, using HHT we present the enhancement of the microtremor data analysis by 1) eliminating the unwanted transient component from microtremor data with EMD analysis by using only the coherent portion of the data to carry out the widely used horizontal to vertical spectral ratio (H/V) method; and 2) enhancing the H/V analysis by using the Hilbert-Huang spectrum (HHS). Application of the proposed approach to a microtremor field dataset acquired in metropolitan Beijing area demonstrated the efficacy of this procedure. This project is supported by Ministry of Science and Technology of China with Project No. 2006DFA21650 and the Institute of Earthquake Science (Project No. 0207690229).

000010755 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010755 653__ $$aMicrotremor, Hilbert-Huang transform, empirical mode decomposition, horizontal to vertical spectral ratio 

000010755 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010755 720__ $$aLiu, Lanbo$$iMehl, Robert$$iChen, Qifu
000010755 8560_ $$ffischerc@itam.cas.cz
000010755 8564_ $$s723304$$uhttps://invenio.itam.cas.cz/record/10755/files/11-0064.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 11-0064.
000010755 962__ $$r9324
000010755 980__ $$aPAPER