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![Comparison of pulse periods obtained from the <span class="search-highlight">HHT</span> <span class="search-highlight">method</span>, wavelet <span class="search-highlight">method</span>, a...]()
![Pulse periods from the wavelet <span class="search-highlight">method</span> versus periods from the <span class="search-highlight">HHT</span> <span class="search-highlight">method</span> fo...]()
![Original record, pulse extracted by <span class="search-highlight">HHT</span> <span class="search-highlight">method</span>, and pulse after filtering f...]()
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![Velocity response spectra of original ground motion, pulse extracted by wav...]()
![Examples of extracted pulses and pulse periods of 22 near‐fault ground‐moti...]()
![Maximum energy changes, original records, extracted pulses, and pulse perio...]()
![(a) Applying Baker’s <span class="search-highlight">method</span> to the iterative procedure for the velocity tim...]()
![Relationship between Baker’s pulse indicators and the maximum energy change...]()
![Original ground motion and pulses extracted by <span class="search-highlight">HHT</span> and wavelet <span class="search-highlight">method</span> for (...]()
![Original ground motion and pulses extracted by <span class="search-highlight">HHT</span> and wavelet <span class="search-highlight">method</span> for t...]()
![Flowchart of the prediction model of the GA-SVM <span class="search-highlight">method</span> based on <span class="search-highlight">HHT</span>.]()
![The prediction results of the GA-SVM <span class="search-highlight">method</span> based on <span class="search-highlight">HHT</span> of acoustic loggin...]()
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1-20 OF 79 RESULTS FOR
HHT method
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1
Journal Article
Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
Publisher: Seismological Society of America
Published: 24 September 2019
Bulletin of the Seismological Society of America (2019) 109 (6): 2384–2398.
... attention should be paid to the frequency components in the ground motion. Based on the identification of frequency components in the original record, a new method based on the Hilbert–Huang transform (HHT) is proposed here. A ground‐motion record can be decomposed into several intrinsic mode functions...
FIGURES
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Includes: Supplemental Content
Image
Comparison of pulse periods obtained from the HHT method, wavelet method, a...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 19. Comparison of pulse periods obtained from the HHT method, wavelet method, and statistical model.
Image
Pulse periods from the wavelet method versus periods from the HHT method fo...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 18. Pulse periods from the wavelet method versus periods from the HHT method for the near‐fault ground motions that are classified by both of these two methods.
Image
Original record, pulse extracted by HHT method, and pulse after filtering f...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 15. Original record, pulse extracted by HHT method, and pulse after filtering for the 1999 Chi‐Chi earthquake, TCU082 station, ground motion.
Journal Article
Application of the Empirical Mode Decomposition-Hilbert Spectrum Method to Identify Near-Fault Ground-Motion Characteristics and Structural Responses
Publisher: Seismological Society of America
Published: 01 October 2001
Bulletin of the Seismological Society of America (2001) 91 (5): 1339–1357.
...Chin-Hsiung Loh; Tsu-Chiu Wu; Norden E. Huang Abstract In this article, the empirical mode decomposition method combined with the Hilbert spectrum method (EMD + HHT) is used to analyze the free-field ground motion and to estimate the global structural property of building and bridge structure...
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Journal Article
An Alternative Approach to Characterize Nonlinear Site Effects
Journal: Earthquake Spectra
Publisher: Earthquake Engineering Research Institute
Published: 01 February 2005
Earthquake Spectra (2005) 21 (1): 243–274.
...Ray Ruichong Zhang, M.EERI; Stephen Hartzell; Jianwen Liang; Yuxian Hu This paper examines the rationale of a method of nonstationary data processing and analysis, referred to as the Hilbert-Huang transform (HHT), for its application to a recording-based approach in quantifying influences of soil...
Image
Velocity response spectra of original ground motion, pulse extracted by wav...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 16. Velocity response spectra of original ground motion, pulse extracted by wavelet method, pulse extracted by HHT method, and ideal pulse for 1999 Chi‐Chi earthquake, TCU075 station, ground motion.
Image
Examples of extracted pulses and pulse periods of 22 near‐fault ground‐moti...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 17. Examples of extracted pulses and pulse periods of 22 near‐fault ground‐motion records that are identified by the HHT method in the 24 controversial records.
Image
Maximum energy changes, original records, extracted pulses, and pulse perio...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 6. Maximum energy changes, original records, extracted pulses, and pulse periods ( T p ) of one of the seven special records that are obtained from the HHT method, and pulse indicators in Baker’s wavelet method. RSN, record serial number.
Image
(a) Applying Baker’s method to the iterative procedure for the velocity tim...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 14. (a) Applying Baker’s method to the iterative procedure for the velocity time history recorded from the Christchurch earthquake, PRPC station. (b) Pulses extracted by the HHT method for the velocity time history recorded from the Christchurch earthquake, PRPC station.
Image
Relationship between Baker’s pulse indicators and the maximum energy change...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 5. Relationship between Baker’s pulse indicators and the maximum energy changes of IMFs that are obtained by the Hilbert–Huang transform (HHT) method. PEER, Pacific Earthquake Engineering Research Center.
Image
Original ground motion and pulses extracted by HHT and wavelet method for (...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 12. Original ground motion and pulses extracted by HHT and wavelet method for (a) the 1984 Morgan Hill earthquake, Coyote Lake Dam station, ground motion; (b) the 1994 Northridge earthquake, Newhall Fire station, ground motion; and (c) the 1995 Kobe earthquake, KJMA station, ground motion.
Image
Original ground motion and pulses extracted by HHT and wavelet method for t...
in Identification of Pulse Periods in Near‐Fault Ground Motions Using the HHT Method
> Bulletin of the Seismological Society of America
Published: 24 September 2019
Figure 11. Original ground motion and pulses extracted by HHT and wavelet method for the 1979 Imperial Valley earthquake, EL Centro Array 5 station, ground motion.
Image
Flowchart of the prediction model of the GA-SVM method based on HHT.
in Prediction of fracture density using genetic algorithm support vector machine based on acoustic logging data
> Geophysics
Published: 24 January 2018
Figure 1. Flowchart of the prediction model of the GA-SVM method based on HHT.
Image
The prediction results of the GA-SVM method based on HHT of acoustic loggin...
in Prediction of fracture density using genetic algorithm support vector machine based on acoustic logging data
> Geophysics
Published: 24 January 2018
Figure 11. The prediction results of the GA-SVM method based on HHT of acoustic logging data in X150–X200 m well section. The empty circles represent the prediction result calculated by the proposed model is consistent with the classification result by using resistivity image logging
Journal Article
Application of the CSAMT method to groundwater exploration in a metropolitan environment
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 08 August 2013
Geophysics (2013) 78 (5): B201–B209.
..., depending on the usage of the machines that generate the electrical or magnetic interference. To apply noise reduction to such a nonstationary system, we applied the Hilbert-Huang transformation (HHT). The HHT is a self-adapted signal-processing method developed for nonlinear, nonstationary signals ( Huang...
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Journal Article
Hilbert–Huang Transform and Energy Rate Functions for Earthquake Source Characterization—A Study from the Japan Trench
Publisher: Seismological Society of America
Published: 08 September 2022
Bulletin of the Seismological Society of America (2022) 112 (6): 2847–2858.
... energy release duration and frequency content and compare the results with two conventional inversion methods. By selecting examples from interplate, intraplate, and intraslab settings, we demonstrate that the HHT has the power to discriminate energy release of earthquakes with different tectonic...
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Includes: Supplemental Content
Journal Article
Prediction of fracture density using genetic algorithm support vector machine based on acoustic logging data
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 24 January 2018
Geophysics (2018) 83 (2): D49–D60.
...Figure 1. Flowchart of the prediction model of the GA-SVM method based on HHT. ...
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Journal Article
The Hilbert–Huang Transform: A High Resolution Spectral Method for Nonlinear and Nonstationary Time Series
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 01 November 2013
Seismological Research Letters (2013) 84 (6): 1074–1080.
... between time and frequency resolution for nonstationary signals and the creation of spurious harmonics for nonlinear signals. We present an open‐source implementation of the Hilbert–Huang transform ( HHT ), an alternative spectral method designed to avoid the linearity and stationarity constraints...
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Includes: Supplemental Content
Journal Article
A three-dimensional surface velocity field for the Mississippi Delta: Implications for coastal restoration and flood potential
Journal: Geology
Publisher: Geological Society of America
Published: 01 June 2015
Geology (2015) 43 (6): 519–522.
... the Allan variance of rates (AVR) method ( Hackl et al., 2011 ) which deals with time-correlated noise in a robust manner (Appendix DR1). Our analysis of tide gauge data is based on the Hilbert-Huang transform (HHT) ( Huang and Wu, 2008 ). This method accounts for decadal or multidecadal effects...
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