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1-20 OF 127 RESULTS FOR
regularized nonstationary autoregression
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Journal Article
Adaptive prediction filtering in t-x-y domain for random noise attenuation using regularized nonstationary autoregression
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 26 November 2014
Geophysics (2015) 80 (1): V13–V21.
... (APF) and further extended this to a 3D t - x - y version for random noise attenuation based on regularized nonstationary autoregression (RNA). Instead of patching, a popular method for handling nonstationarity, we obtained smoothly nonstationary APF coefficients by solving a global regularized least...
Journal Article
Seismic data decomposition into spectral components using regularized nonstationary autoregression
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 08 October 2013
Geophysics (2013) 78 (6): O69–O76.
... nonstationary autoregression. To estimate local amplitudes of different components, I fit their sum to the data using regularized nonstationary regression. Shaping regularization ensures stability of the estimation process and provides controls on smoothness of the estimated parameters. Potential applications...
Journal Article
Random noise attenuation using f - x regularized nonstationary autoregression
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 21 February 2012
Geophysics (2012) 77 (2): V61–V69.
...Guochang Liu; Xiaohong Chen; Jing Du; Kailong Wu ABSTRACT We have developed a novel method for random noise attenuation in seismic data by applying regularized nonstationary autoregression (RNA) in the frequency-space ( f - x ) domain. The method adaptively predicts the signal with spatial changes...
Journal Article
Seismic data interpolation beyond aliasing using regularized nonstationary autoregression
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 21 November 2011
Geophysics (2011) 76 (5): V69–V77.
...) and regularized nonstationary autoregression. Instead of cutting data into overlapping windows (patching), a popular method for handling nonstationarity, we obtain smoothly nonstationary PEF coefficients by solving a global regularized least-squares problem. We employ shaping regularization to control...
Journal Article
Random noise attenuation of 3D multicomponent seismic data using a fast adaptive prediction filter
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 22 March 2024
Geophysics (2024) 89 (3): V263–V280.
... neglected. For 3D multicomponent data, we develop a multicomponent adaptive prediction filter (MAPF) based on noncausal regularized nonstationary autoregressive models to implement random noise attenuation in the t - x - y domain. The MAPF for multicomponent signals can be used to identify the potential...
Journal Article
Nonstationary predictive filtering for seismic random noise suppression — A tutorial
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 19 March 2021
Geophysics (2021) 86 (3): W21–W30.
.... The regularized nonstationary autoregression (RNAR) method can be treated as a nonstationary extension of traditional PF, in which the predictive filter coefficients are variable in different spatial locations. This highly underdetermined inverse problem is solved by shaping regularization with a smoothness...
Journal Article
Streaming orthogonal prediction filter in the t - x domain for random noise attenuation
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 26 June 2018
Geophysics (2018) 83 (4): F41–F48.
.... The streaming characteristic makes the proposed method faster than iterative approaches. In comparison with f - x deconvolution and f - x regularized nonstationary autoregression, we tested the feasibility of the proposed method in attenuating random noise on two synthetic data sets. Field-data examples confirm...
Image
(a) Marmousi model and (b) trace interpolation with regularized nonstationa...
in Seismic data interpolation beyond aliasing using regularized nonstationary autoregression
> Geophysics
Published: 21 November 2011
Figure 3. (a) Marmousi model and (b) trace interpolation with regularized nonstationary autoregression.
Image
(a) Curved model (Figure 2c ) with 70% randomly selected traces removed an...
in Seismic data interpolation beyond aliasing using regularized nonstationary autoregression
> Geophysics
Published: 21 November 2011
Figure 4. (a) Curved model (Figure 2c ) with 70% randomly selected traces removed and (b) trace interpolation with regularized nonstationary autoregression.
Image
A 3D field data example. (a) Teapot Dome data set. Denoised data using the ...
Published: 06 December 2021
Figure 12. A 3D field data example. (a) Teapot Dome data set. Denoised data using the (b) f - x - y regularized nonstationary autoregression (RNAR) method, (c) local orthogonalization method, and (d) proposed method.
Image
(a) Aliased synthetic data, (b) trace interpolation with plane-wave destruc...
in Seismic data interpolation beyond aliasing using regularized nonstationary autoregression
> Geophysics
Published: 21 November 2011
Figure 1. (a) Aliased synthetic data, (b) trace interpolation with plane-wave destruction, and (c) trace interpolation with regularized nonstationary autoregression. Three additional traces were inserted between each of the neighboring input traces.
Image
Conventional processing methods. Stage I: after ground roll removal, (b) es...
Published: 18 November 2021
Figure 12. Conventional processing methods. Stage I: after ground roll removal, (b) estimated signal, and (c) estimated ground roll. Stage II: after applying f - x regularized nonstationary autoregression to the signal estimate from stage I, (e) estimated signal, and (f) estimated ground roll
Journal Article
Streaming prediction-error filters
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 29 July 2024
Geophysics (2024) 89 (5): F89–F95.
... , Random noise attenuation using f-x regularized nonstationary autoregression : Geophysics , 77 , no. 2 , V61 – V69 , doi: http://dx.doi.org/10.1190/geo2011-0117.1 . GPYSA7 0016-8033 Liu Y. Fomel S. , 2011 , Seismic data interpolation beyond aliasing using regularized nonstationary...
Includes: Supplemental Content
Journal Article
5D dealiased seismic data interpolation using nonstationary prediction-error filter
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 18 August 2021
Geophysics (2021) 86 (5): V419–V429.
...-space domain, its frequency-space domain counterpart is developed in Liu et al. (2012) and is called the regularized nonstationary autoregression. However, compared to frequency-space domain NPEF, the time-space domain approach is usually less likely to cause artifacts ( Abma and Claerbout, 1995...
Journal Article
Physics-constrained deep learning for ground roll attenuation
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 18 November 2021
Geophysics (2022) 87 (1): V15–V27.
...Figure 12. Conventional processing methods. Stage I: after ground roll removal, (b) estimated signal, and (c) estimated ground roll. Stage II: after applying f - x regularized nonstationary autoregression to the signal estimate from stage I, (e) estimated signal, and (f) estimated ground roll...
Journal Article
Random noise attenuation using local signal-and-noise orthogonalization
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 19 March 2015
Geophysics (2015) 80 (6): WD1–WD9.
... the proposed method. The third field data example is borrowed from Liu et al. (2012) . The noisy data are shown in Figure 8 . The initial signal and noise models are prepared using f - x regularized nonstationary autoregression (RNAR). Following the approach of Liu et al. (2012...
Journal Article
Seismic data interpolation without iteration using a t - x - y streaming prediction filter with varying smoothness
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 19 November 2021
Geophysics (2022) 87 (1): V29–V38.
... to reconstruct seismic data in the frequency domain. Liu and Chen (2018) develop a prediction interpolation by using f - x regularized nonstationary autoregression (RNA), which can deal with the events that have space-varying dips. Zheng et al. (2019) develop a streaming prediction filter (SPF...
Journal Article
Preserving signal during random noise attenuation through migration enhancement and local orthogonalization
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 01 August 2022
Geophysics (2022) 87 (5): V451–V466.
... domain for random noise attenuation : Geophysics , 83 , no. 4 , F41 – F48 , doi: http://dx.doi.org/10.1190/geo2017-0322.1 . GPYSA7 0016-8033 Liu G. Chen X. Du J. Wu K. , 2012 , Random noise attenuation using f-x regularized nonstationary autoregression : Geophysics , 77...
Journal Article
3-d Butterworth Filtering For 3-d High-density Onshore Seismic Field Data
Jianping Liao, Hexiu Liu, Weibo Li, Zhenwei Guo, Lixin Wang, Huazhong Wang, Suping Peng, Andrew Hursthouse
Published: 29 May 2018
Journal of Environmental and Engineering Geophysics (2018) 23 (2): 223–233.
... .
Liu,
G.,
Chen,
X.,
Du,
J.
and
Wu,
K.,
2012 ,
Random noise attenuation using f-x regularized nonstationary autoregression :
Geophysics ,
77 ,
V61...
Journal Article
Retrieving the leaked signals from noise using a fast dictionary-learning method
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 06 December 2021
Geophysics (2022) 87 (1): V39–V49.
...Figure 12. A 3D field data example. (a) Teapot Dome data set. Denoised data using the (b) f - x - y regularized nonstationary autoregression (RNAR) method, (c) local orthogonalization method, and (d) proposed method. ...
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