Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Peyman P. Moghaddam"'
Autor:
Manni Mofidi, Mohammad Reza Yasin Zadeh, Farzad Sina, Mahdi Rezai, Peyman Hafezi Moghaddam, Saeed Abbasi, Babak Mahshidfar, Davood Farsi, Abbas Hasani
Publikováno v:
Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum, Vol 11, Iss 12, Pp 10-16 (2018)
Background and Objectives: Seizure is one of the important reasons for referral to the emergency department, which sometimes indicates serious damage to the brain parenchyma. Since in patients without a history, awareness of the medium-term course of
Externí odkaz:
https://doaj.org/article/dedb5e0d326f402993988fd2ebe3593d
Publikováno v:
GEOPHYSICS. 74:A41-A46
The extremely large size of typical seismic imaging problems has been a major stumbling block for iterative techniques to attain accurate migration amplitudes. These iterative methods are important because they complement theoretical approaches hampe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8b7ce956d992839912ff7ed804b3540
https://doi.org/10.1190/1.3124753
https://doi.org/10.1190/1.3124753
Publikováno v:
Applied and Computational Harmonic Analysis, 24(2), 150-173. Academic Press Inc.
A nonlinear singularity-preserving solution to seismic image recovery with sparseness and continuity constraints is proposed. We observe that curvelets, as a directional frame expansion, lead to sparsity of seismic images and exhibit invariance under
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97884b5613e01c7086d412942068fba3
Publikováno v:
GEOPHYSICS. 73:A1-A5
Mitigating missing data, multiples, and erroneous migration amplitudes are key factors that determine image quality. Curvelets, little “plane waves,” complete with oscillations in one direction and smoothness in the other directions, sparsify a p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cf42211cbc9059da305aec1c896c4b5
https://doi.org/10.1190/1.2799517
https://doi.org/10.1190/1.2799517
Publikováno v:
IEEE Transactions on Signal Processing. 51:1129-1142
This paper addresses a new approach to time-delay estimation based upon the autocorrelation estimator (AE). The primary aim of this paper is to estimate time-delays in a multipath environment in absence of prior knowledge of the channel. The maximum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::547197f0782731c4831141505b5589e2
https://doi.org/10.1109/tsp.2003.810290
https://doi.org/10.1109/tsp.2003.810290
Autor:
Peyman P. Moghaddam, Tomoaki Yamada, Ryota Hino, Kimihiro Mochizuki, Aya Kamimura, Minoru Nishino, Toshinori Sato, Yasuyuki Nakamura, Toshihiko Kanazawa, Junzo Kasahara, M. Nakamura
Publikováno v:
Journal of Geography (Chigaku Zasshi). 112:814-827
To study earthquake generation mechanisms, we carried out two seismic experiments in the Izu-Bonin Trench and the Japan Trench subduction zones using OBS and controlled sources in 1996 and 1998, respectively. In the Izu-Bonin subduction zone, we infe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab97d608578e1743e98616818eff9a87
https://doi.org/10.5026/jgeography.112.6_814
https://doi.org/10.5026/jgeography.112.6_814
Publikováno v:
Geophysics, 78 (3), 2013
Waveform inversion is the method of choice for determining a highly heterogeneous subsurface structure. However, conventional waveform inversion requires that the wavefield for each source is computed separately. This makes it very expensive for real
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6406db7df29e2c6c645cf0914f3ea5a
http://resolver.tudelft.nl/uuid:ba6a791a-d751-4add-b530-3a4eaf0654e5
http://resolver.tudelft.nl/uuid:ba6a791a-d751-4add-b530-3a4eaf0654e5
Autor:
Wim A. Mulder, Peyman P. Moghaddam
Publikováno v:
SEG Technical Program Expanded Abstracts 2012.
SUMMARY Full waveform inversion with the classic least-squares cost functional suffers from spurious local minima caused by cycle skipping in the absence of low frequencies in the seismic data. We present an alternative cost functional that is less s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d4e7c3f247082aec98546d8f92878ac
https://doi.org/10.1190/segam2012-0210.1
https://doi.org/10.1190/segam2012-0210.1
Autor:
Felix J. Herrmann, Peyman P. Moghaddam
Publikováno v:
SEG Technical Program Expanded Abstracts 2010.
Full-waveform inversion relies on the collection of large multiexperiment data volumes in combination with a sophisticated back-end to create high-fidelity inversion results. While improvements in acquisition and inversion have been extremely success
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9892aa5706cf36e71d326e65dab8b5f
https://doi.org/10.1190/1.3513940
https://doi.org/10.1190/1.3513940
Publikováno v:
SEG Technical Program Expanded Abstracts 2009.
We give an overview of an implementation of Reverse Time Migration (RTM) on heterogeneous multi-core hardware based on Graphics Processing Units (GPUs). We demonstrate the clear advantages of GPU-based hardware for RTM, not only in terms of performan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75302eaee2c282fbc7061ad28863b056
https://doi.org/10.1190/1.3255428
https://doi.org/10.1190/1.3255428