Zobrazeno 1 - 10 of 23 pro vyhledávání: '"Petr Petrov"'
1
Classical T Tauri stars: accretion, wind, dust
Autor: Petr Petrov
Publikováno v: Acta Astrophysica Taurica. 2:1-8
Classical T Tauri stars (CTTS) are at the early evolutionary stage when the processes of planet formation take place in the surrounding accretion disks. Most of the observed activity in CTTS is due to magnetospheric accretion and wind flows. Observat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1a304c8afb06b4f75dc15836291c9ff8
https://doi.org/10.31059/aat.vol2.iss1.pp1-8
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2
Fundamentals of dissertation management
Autor: Yu. Treschevskiy, Petr Petrov, Semen Reznik
The textbook discusses the management system of the processes of training and certification of scientific personnel in Russia. Considerable attention is paid to the preparation, organization and conduct of dissertation research, preparation for the d
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::815dec786d43d9a541123c392bf4e745
https://doi.org/10.12737/1896122
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3
Echelle spectrograph at the 2.6 m Shajn telescope
Autor: Evgenii Nekhai, D. Baklanova, Petr Petrov, S. Plachinda, Aleksandr Lagutin, Dmitrii Shakhovskoi
Publikováno v: Acta Astrophysica Taurica. 1:33-38
The paper describes the high-resolution echelle spectrograph ESPL developed for the coude focus of the 2.6 m Shajn reflector of the Crimean Astrophysical Observatory. The spectrograph has been regularly operated since 2013. Efficiency of the spectrog
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b9f736e52eee587c21645d6d26786b5
https://doi.org/10.31059/aat.vol1.iss1.pp33-38
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4
Estimation of seismic source parameters in 3D elastic media using the reciprocity theorem
Autor: Petr Petrov, Gregory A. Newman
Publikováno v: GEOPHYSICS. 84:R963-R976
We have developed a novel method based upon reciprocity principles to simultaneously estimate the location of a seismic event and its source mechanism in 3D heterogeneous media. The method finds double-couple (DC) and non-DC mechanisms of microearthq
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::61eeaf9b88137407efd7d421f2dfd8a5
https://doi.org/10.1190/geo2018-0283.1
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6
Imaging of plant current pathways for non-invasive root Phenotyping using a newly developed electrical current source density approach
Autor: Xue-Feng Ma, Petr Petrov, Luca Peruzzo, Susan S. Hubbard, Xiuwei Liu, Elison B. Blancaflor, Florian M. Wagner, Gregory A. Newman, Benjamin Mary, Chunwei Chou, Yuxin Wu, Myriam Schmutz
Publikováno v: Plant and Soil, vol 450, iss 1-2
Plant and Soil 450, 567-584 (2020). doi:10.1007/s11104-020-04529-w special issue: "Plant-soil interactions in the Amazon rainforest / Issue Editors: Bernardo Flores, Rafael Oliveira, Lucy Rowland, Carlos Alberto Quesada, Hans Lambers"
Plant and Soil (2020). doi:10.1007/s11104-020-04529-w
Published by Springer Science + Business Media B.V, Dordrecht [u.a.]
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3944f33de41de48d9f22771ed222977c
https://escholarship.org/uc/item/4901v42x
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7
Embedded boundary methods for modeling 3D finite-difference Laplace-Fourier domain acoustic-wave equation with free-surface topography
Autor: Gregory A. Newman, Hussain AlSalem, Petr Petrov, James W. Rector
Publikováno v: Geophysics, vol 83, iss 5
Alsalem, H; Petrov, P; Newman, G; & Rector, J. (2018). Embedded boundary methods for modeling 3D finite-difference Laplace-Fourier domain acoustic-wave equation with free-surface topography. Geophysics, 83(5), T291-T300. doi: 10.1190/geo2017-0828.1. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/97t995qq
© 2018 Society of Exploration Geophysicists. We have developed embedded boundary methods to handle arbitrarily shaped topography to accurately simulate acoustic seismic wave propagation in the Laplace-Fourier domain. The purpose is to use this metho
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa6de6b9ea171a1439c50305c119fd88
https://doi.org/10.1190/geo2017-0828.1
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8
Multistep inversion workflow for 3D long-offset damped elastic waves in the Fourier domain
Autor: Petr Petrov, Gregory A. Newman
Publikováno v: Geophysical Prospecting. 65:1277-1292
We present a new workflow for imaging damped three-dimensional elastic wavefields in the Fourier domain. The workflow employs a multiscale imaging approach, in which offset lengths are laddered, where frequency content and damping of the data are cha
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::abb4ffdecf79f3f3390746009645eea8
https://doi.org/10.1111/1365-2478.12487
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9
Rapid estimation of earthquake locations using waveform traveltimes
Autor: Donald W. Vasco, G. Newman, Seiji Nakagawa, Petr Petrov
Publikováno v: Vasco, DW; Nakagawa, Seiji; Petrov, Petr; & Newman, Greg. (2019). Rapid estimation of earthquake locations using waveform traveltimes. Geophysical Journal International, 217(3), 1727-1741. doi: 10.1093/gji/ggz114. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/5f90m3kh
Geophysical Journal International, vol 217, iss 3
© Published by Oxford University Press on behalf of The Royal Astronomical Society 2019. This work is written by (a) US Government employee(s) and is in the public domain in the US. SUMMARY We introduce a new approach for locating earthquakes using
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eccd00c4761fbea91b39033e24f4af84
http://www.escholarship.org/uc/item/5f90m3kh
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10
Efficient three-dimensional Laplace-Fourier domain acoustic-wave simulations using discontinuous finite-difference meshes with embedded boundaries
Autor: Petr Petrov, Gregory A. Newman, James W. Rector, Hussain AlSalem
Publikováno v: SEG Technical Program Expanded Abstracts 2018.
Author(s): AlSalem, H; Petrov, P; Newman, G; Rector, J | Abstract: We develop embedded boundary and discontinuous mesh methods to handle arbirarily shaped topography and accurately simulate acoustic seismic wave propagation in Laplace-Fourier domain.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff2e06ff1e92e42008b116130e032bc9
https://doi.org/10.1190/segam2018-2988015.1
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