Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Ziyu Shen"'
Publikováno v:
Geo-spatial Information Science, Pp 1-20 (2023)
ABSTRACTAccording to General Relativity Theory (GRT), by comparing the frequencies between two precise clocks at two different stations, the gravity potential (geopotential) difference between the two stations can be determined due to the gravity fre
Externí odkaz:
https://doaj.org/article/dc43eab131bf4ec99d08d2a60c382533
Publikováno v:
IEEE Access, Vol 11, Pp 92996-93003 (2023)
Orthometric height datum systems are critical in the geodetic community. Nonetheless, individual nations or local regions maintain their distinct height systems. These systems, primarily determined by conventional spirit leveling, exhibit inhomogenei
Externí odkaz:
https://doaj.org/article/1ca2c3824fdd4bb99c486dd124e60255
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-17 (2022)
Abstract In this paper, the surface texture parameters and distribution patterns are studied by numerical simulation and experiment. First, a three-dimensional micro-textured CFD fluid lubrication model with cavitation effect is established, and diff
Externí odkaz:
https://doaj.org/article/a73394627fae4b1a8c328d028b45443e
Autor:
Ziyu Shen, Wenbin Shen, Xinyu Xu, Shuangxi Zhang, Tengxu Zhang, Lin He, Zhan Cai, Si Xiong, Lingxuan Wang
Publikováno v:
Remote Sensing, Vol 15, Iss 14, p 3514 (2023)
We introduce an approach for the direct measurement of the gravitational potential (GP) along the trajectory of a satellite, with a specific focus on Low-Earth Orbit (LEO) satellites. A LEO satellite communicates with several Geosynchronous Equatoria
Externí odkaz:
https://doaj.org/article/61aa48c2b32f4d1da73f3ff58fecd4cd
Publikováno v:
Geodesy and Geodynamics, Vol 12, Iss 6, Pp 405-412 (2021)
The development of remote frequency transfer techniques, especially the appearance of optical clocks with unprecedented stability, has prompted geoscientists to study their applications in geodesy. Using remote frequency transfer technique, by freque
Externí odkaz:
https://doaj.org/article/12f094b33daa4043ab096cfc8018842c
Autor:
Yiheng Zhang, Dayu Zhu, Tao Li, Xiaoya Wang, Lili Zhao, Xiaofei Yang, Meijuan Dang, Ye Li, Yulun Wu, Ziwei Lu, Jialiang Lu, Yating Jian, Heying Wang, Lei Zhang, Xiaoyun Lu, Ziyu Shen, Hong Fan, Wenshan Cai, Guilian Zhang
Publikováno v:
Biomedicine & Pharmacotherapy, Vol 155, Iss , Pp 113641- (2022)
The time window from stroke onset is critical for the treatment decision. However, in unknown onset stroke, it is often difficult to determine the exact onset time because of the lack of assessment methods, which can result in controversial and rando
Externí odkaz:
https://doaj.org/article/ef147c1d10e94e4abb95f62203e59953
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 7, Pp 1-16 (2021)
Abstract Over the decades, testing gravitational red-shift (GRS) based on microwave links has made great process, including the GPA experiment, the planned Atomic Clock Ensemble in Space mission, and the China Space Station (CSS). Until now, the form
Externí odkaz:
https://doaj.org/article/9179c88ffde741d7a3501553fe436b5a
Autor:
Ziyu Shen, Wenbin Shen, Shuangxi Zhang, C. K. Shum, Tengxu Zhang, Lin He, Zhan Cai, Si Xiong, Lingxuan Wang
Publikováno v:
Remote Sensing, Vol 15, Iss 12, p 3020 (2023)
The International Association of Geodesy (IAG) aims to establish the International Height Reference System (IHRS) as one of its primary scientific objectives. Central to the realization of the IHRS is global vertical datum unification, which requires
Externí odkaz:
https://doaj.org/article/730faa9334de4680bb8bc5ae9da39235
Publikováno v:
Geodesy and Geodynamics, Vol 11, Iss 4, Pp 229-241 (2020)
General relativity theory (GRT) concludes that a precise clock ticks at different running rates if it is under the influence of different geopotentials. Therefore, by comparing the running rates of clocks at arbitrary two stations, the geopotential d
Externí odkaz:
https://doaj.org/article/a36c1dbe37a649f5a47e59f94ec433c5
Publikováno v:
IEEE Access, Vol 8, Pp 204283-204294 (2020)
Based on the general relativity theory, the geopotential difference can be determined by comparing the change in time difference between precise clocks using the precise point positioning (PPP) time transfer technique, referred to as the relativistic
Externí odkaz:
https://doaj.org/article/acf08669e4254784af069f40e9596ef7