Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Qihui Zhen"'
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)
Abstract The environment is seriously threatened by the methane emitted as permafrost melts. Studying deposits of natural gas hydrates that include methane is therefore important. This study presents a novel approach based on the rock Archie formula
Externí odkaz:
https://doaj.org/article/c84f93dacc2545ef9be24ac5698315dc
Publikováno v:
Sensors, Vol 23, Iss 1, p 439 (2022)
Airborne transient electromagnetic (ATEM) technology is a technique often used in mineral exploration and geological mapping. Due to inductive polarization (IP) phenomena, the ATEM response curve often shows a negative response or declines rapidly to
Externí odkaz:
https://doaj.org/article/1c6dfdad380d42a7bdb4fd4d7d482059
Publikováno v:
Applied Sciences, Vol 11, Iss 22, p 10877 (2021)
Data telemetry is a critical element of successful unconventional well drilling operations, involving the transmission of information about the well-surrounding geology to the surface in real-time to serve as the basis for geosteering and well planni
Externí odkaz:
https://doaj.org/article/7e53d774c1514bb3a247ccf883a633e7
Publikováno v:
Energies, Vol 13, Iss 22, p 5873 (2020)
This paper deals with the study of multi-channel adaptive noise cancellation with a focus on its application in electromagnetic (EM) telemetry. We presented new variable step-size least mean square (LMS) techniques: regularized variable step-size LMS
Externí odkaz:
https://doaj.org/article/394a1766c08d4f5db4427a4f573586f1
Autor:
Qihui Zhen, Qingyun Di
Publikováno v:
Energies, Vol 13, Iss 19, p 5130 (2020)
An active clamp, three-phase, six-switch power factor correction rectifier with a one-cycle controller is proposed, which can effectively suppress the reverse recovery of the reverse parallel diode of the bridge arm switch and reduce the reverse reco
Externí odkaz:
https://doaj.org/article/40f6d95a54d646248b826ddb88db7c0f
Publikováno v:
Science China Earth Sciences. 66:765-780
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::007fa005f9385144bc75c5817a59e51e
https://doi.org/10.1007/s11430-021-1037-3
https://doi.org/10.1007/s11430-021-1037-3
Publikováno v:
Acta Geologica Sinica - English Edition. 95:76-79
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6dea7ab99a9f439a74ee1af5c4e205d
https://doi.org/10.1111/1755-6724.14838
https://doi.org/10.1111/1755-6724.14838
Publikováno v:
Petroleum Science. 18:106-122
An axisymmetric finite difference method is employed for the simulations of electromagnetic telemetry in the homogeneous and layered underground formation. In this method, we defined the anisotropy property using extensive 2D conductivity tensor and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b615f2f693dcb8796c1aac03a1cb3ad4
https://doi.org/10.1007/s12182-020-00523-0
https://doi.org/10.1007/s12182-020-00523-0
Autor:
Liangyong Yang, Pengfei Liang, Jianbao Fan, Ruo Wang, Olalekan Fayemi, Zhiguo An, Qingyun Di, Qihui Zhen, Ma Zhenjun, Da Lei, Changmin Fu
Publikováno v:
GEOPHYSICS. 85:E207-E219
Electromagnetic (EM) telemetry is one of the key research subjects that has increased application in transmitting real-time data between the borehole and surface during drilling. There are several methods that can be used to model an EM telemetry sys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43b255756cb8da6aef41eba926bd804d
https://doi.org/10.1190/geo2019-0568.1
https://doi.org/10.1190/geo2019-0568.1
Publikováno v:
Acta Geologica Sinica - English Edition. 93:305-309
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a0405571077861da26d3b7d8c530237
https://doi.org/10.1111/1755-6724.14108
https://doi.org/10.1111/1755-6724.14108