Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Shengwei Fan"'
Publikováno v:
Coatings; Volume 13; Issue 6; Pages: 1023
The contact surface corrosion of friction high-strength bolt (FHSB) joints was analyzed to examine the characteristics of corrosion products and influence factors in steel bridges. Samples were selected from the Dongying Shengli Yellow River Bridge,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::88f0ae5ab37b99f674ba30a694797bc1
This paper analyzed the main diseases of the friction high-strength bolt (FHSB) joints in order to study the characteristics of the corrosion products of the joints in steel bridge and the influence factors. Seven representative FHSB connection pairs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e684b5ace7ef38edebee303d287a7f4d
https://doi.org/10.20944/preprints202304.0431.v1
https://doi.org/10.20944/preprints202304.0431.v1
Autor:
Weibin Xie, Qing Wang, Xuan He, Zhichao Yuan, Shengwei Fang, Nan Chen, Zezheng Xiong, Jun’an Zhang, Xianghui Qi, Shaoguang Li, Xuzong Chen
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
Herein, we report the scheme of an optically pumped atomic clock based on a cold cesium atomic beam source. We propose the laser system and physical mechanism of this atomic clock, wherein the atomic beam travels in an upper parabolic trajectory, the
Externí odkaz:
https://doaj.org/article/56dfb275e63341fea7c7072c5a83d8c1
Autor:
Hongyan Zhang, Shengwei Fan
Publikováno v:
Journal of Computers. 8
In order to realize the recognition for dynamic facial images, the paper builds a dynamic matching model. First, this paper introduces a dynamic feature extraction algorithm of feature constraint optimization which can effectively extract the 2D dyna
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10d66787a4648fb4f93783cee8acf394
https://doi.org/10.4304/jcp.8.11.3004-3011
https://doi.org/10.4304/jcp.8.11.3004-3011
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
The research of optically pumped cesium beam atomic clock (OPCB) at Peking University has lasted for decades. At present, the short-term frequency stability is 3×10−12/τ and the long-term (5-day) frequency stability can reach 7 × 10−15. The op
Externí odkaz:
https://doaj.org/article/e1f89014148d4f2890b9f51f49b1da8e
Publikováno v:
AIP Advances, Vol 12, Iss 7, Pp 075124-075124-10 (2022)
A beam source is proposed for the production of an intense cold cesium atomic beam that can be used in cesium beam atomic clocks. The source is based on a two-dimensional magneto-optical trap (2D-MOT), but introduces hollow cooling and pushing lights
Externí odkaz:
https://doaj.org/article/49b546e7ea97479285eb123f2c77cc92
Publikováno v:
The Journal of Engineering (2019)
In view of the overvoltage problem of an ultra-high-voltage DC (UHVDC) AC/DC hybrid system, this study analyses the overvoltage condition under various fault types and gives the identification criterion of the overvoltage form. Firstly, the model of
Externí odkaz:
https://doaj.org/article/32feb5393d6f4b9992691d0d5e6f9ae5
Publikováno v:
The Journal of Engineering (2019)
Due to the high UHV AC/DC transmission line tower, the working voltage amplitude on the wire is large, causing lightning accidents. The paper first analyses the impact of lightning strike point on lightning overvoltage of 1000 kV UHV transformer subs
Externí odkaz:
https://doaj.org/article/fa138a24fe8242668badb24e0707cc66
Publikováno v:
Energies, Vol 10, Iss 12, p 1995 (2017)
In recent years, with the rapid development of offshore wind turbines (WTs), the problem of lightning strikes has become more and more prominent. In order to reduce the failure rate caused by the transient overvoltage of lightning struck offshore WTs
Externí odkaz:
https://doaj.org/article/262144b1d92246fba8e53807b92c0118