Zobrazeno 1 - 10 of 31 pro vyhledávání: '"Junfeng Qin"'
1
Akademický článek
Source of Drift-dispersed Electrons in Martian Crustal Magnetic Fields
Autor: Chi Zhang, Hongyang Zhou, Chuanfei Dong, Yuki Harada, Masatoshi Yamauchi, Shaosui Xu, Hans Nilsson, Yusuke Ebihara, Shannon M. Curry, Junfeng Qin, David L. Mitchell, David A. Brain
Publikováno v: The Astrophysical Journal, Vol 972, Iss 2, p 153 (2024)
Mars lacks a global intrinsic dipole field but possesses localized crustal fields, making it unique in the solar system. Recent observations revealed that electrons can be injected into the crustal fields, and exhibit drift-dispersed bursts due to th
Externí odkaz: https://doaj.org/article/a6f9add50b4d47ef81ad90bd4ec1cd79
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2
Akademický článek
A method of estimating the Martian neutral atmospheric density at 130 km, and comparison of its results with Mars Global Surveyor and Mars Odyssey aerobraking observations based on the Mars Climate Database outputs
Autor: JunFeng Qin, Hong Zou, YuGuang Ye, YongQiang Hao, JinSong Wang, Erling Nielsen
Publikováno v: Earth and Planetary Physics, Vol 4, Iss 4, Pp 408-419 (2020)
Profiles of the Martian dayside ionosphere can be used to derive the neutral atmospheric densities at 130 km, which can also be obtained from the Mars Climate Database (MCD) and spacecraft aerobraking observations. In this research, we explain the me
Externí odkaz: https://doaj.org/article/70fb0bbda47b4f87a719bb414351bf34
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5
One-step integration of amorphous RuBx and crystalline Ru nanoparticles into B/N-doped porous carbon polyhedra for robust electrocatalytic activity towards the HER in both acidic and basic media
Autor: Jie Tang, Biao Wang, Yanzheng Zhang, Xiaohua Zhang, Qinghui Shen, Junfeng Qin, Song Xue, Xi Guo, Cuicui Du, Jinhua Chen
Publikováno v: Journal of Materials Chemistry A. 10:4181-4190
Amorphous RuBx and crystalline Ru nanoparticles integrated into B/N-doped porous carbon polyhedra via a facile one-step thermal-reduction exhibited remarkable HER electrocatalytic performances in both alkaline and acidic media.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cc571c65b01c744dd3c6d25aa972c67e
https://doi.org/10.1039/d1ta08512c
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7
Robust adaptive asymptotic trajectory tracking control for underactuated surface vessels subject to unknown dynamics and input saturation
Autor: Jialu Du, Junfeng Qin
Publikováno v: Journal of Marine Science and Technology. 27:307-319
In this paper, a robust adaptive control scheme is proposed for the trajectory tracking control of underactuated surface vessels (USVs) subject to unknown dynamics, external disturbances and input saturation. First, a coordinate transformation is int
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::18ae8d2efeed86a66516df8fd2ebe26f
https://doi.org/10.1007/s00773-021-00835-9
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10
A method of estimating the Martian neutral atmospheric density at 130 km, and comparison of its results with Mars Global Surveyor and Mars Odyssey aerobraking observations based on the Mars Climate Database outputs
Autor: Yongqiang Hao, JinSong Wang, Erling Nielsen, YuGuang Ye, Hong Zou, JunFeng Qin
Publikováno v: Earth and Planetary Physics. 4:1-12
Profiles of the Martian dayside ionosphere can be used to derive the neutral atmospheric densities at 130 km, which can also be obtained from the Mars Climate Database (MCD) and spacecraft aerobraking observations. In this research, we explain the me
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f0eb0f5cfb3dafeb72a1e0c8d905f459
https://doi.org/10.26464/epp2020038
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