Zobrazeno 1 - 10
of 874
pro vyhledávání: '"LIU Li-jun"'
Publikováno v:
Guangtongxin yanjiu, Pp 63-66,78 (2023)
To improve transmission line load capacity and prevent power grid accidents, an online sag monitoring system for overhead transmission lines based on spontaneous Brillouin scattering is designed using the principles of Brillouin scattering and cohere
Externí odkaz:
https://doaj.org/article/ef9a05a4a1644204ad42dd04839e2465
Autor:
YU Feng, WANG Wei, YU Yang, WANG Deng-hong, LIU Shan-bao, GAO Juan-qin, LV Bing-ting, LIU Li-jun
Publikováno v:
Yankuang ceshi, Vol 40, Iss 3, Pp 408-424 (2021)
BACKGROUND The Jiulong area in western Sichuan is an important rare metal production area in China, which has a large resource potential. As an ecological protection barrier on the upper reaches of the Yangtze River, the ecological environment of thi
Externí odkaz:
https://doaj.org/article/8180d64171e34e5c94f48400669392d6
Publikováno v:
Yankuang ceshi, Vol 38, Iss 6, Pp 681-692 (2019)
BACKGROUND When inductively coupled plasma-mass spectrometry (ICP-MS) is used to determine the rare earth elements (REE) in the barite-associated light rare earth ores, Ba and light rare earth elements La, Ce, Pr, Nd, Sm, cause severe mass spectral o
Externí odkaz:
https://doaj.org/article/86143ddeac764ccabedc9e743d23fc8b
Publikováno v:
Yankuang ceshi, Vol 38, Iss 5, Pp 534-544 (2019)
BACKGROUND Under the background of coordinated development of resources, environment and economy, the development of green mining has become a national strategic focus and has been widely recognized. Environmental investigation and evaluation is one
Externí odkaz:
https://doaj.org/article/79acf453d53249d7985b9456633ec156
Publikováno v:
工程科学学报, Vol 41, Iss 6, Pp 719-730 (2019)
In recent years, low-salinity waterflooding has become the focus of research in the petroleum industry owing to its enormous advantages, including high efficiency in displacing oils, ease of injection into oil-bearing formations, easy access and oper
Externí odkaz:
https://doaj.org/article/d1a659a56460419094afd3429e619e28
Publikováno v:
Yankuang ceshi, Vol 37, Iss 5, Pp 507-517 (2018)
BACKGROUND The Sichuan Jiajika ore field is one of the most concentrated areas of lithium resources in China and even in the world. At present, the understanding of the spectroscopy of the Jiajika lithium deposit is still very poor. OBJECTIVES To bet
Externí odkaz:
https://doaj.org/article/ac9577b580234210b19a0a5368993e92
Publikováno v:
Yankuang ceshi, Vol 37, Iss 3, Pp 336-345 (2018)
BACKGROUND A new deposit type with a scheelite-beryl-molybdenite assemblage was first discovered in the Zhen'an area of Shaanxi Province. BAOBJECTIVES The research on chromatic mechanism and genetic mechanism of emerald was carried out. METHODS Combi
Externí odkaz:
https://doaj.org/article/d9a3cdf8800343c3bd99595510bd9f1b
Publikováno v:
Journal of Harbin University of Science and Technology, Pp 112-116 (2017)
Aim at highly nonlinear mapping relationship between the laser processing parameters and the melting cell body’s transverse size，a method of reverse engineering laser melting parameters by back － propagation ( BP) neural network was put forward
Externí odkaz:
https://doaj.org/article/7041131bd7c741af86dfc99c99cfbc78
Publikováno v:
Journal of Harbin University of Science and Technology, Pp 18-22 (2017)
For high density polyethylene pipe connection，welding technology is the key of the high density engineering plastic pressure pipe safety. And the temperature distribution in the welding process has a very important influence on the welding quality.
Externí odkaz:
https://doaj.org/article/1884461f226e4b9d9dac9c8e01f46ef9
Publikováno v:
Yankuang ceshi, Vol 32, Iss 5, Pp 810-816 (2013)
Sichuan Province is one of the most important provinces in China for light rare earth element (LREE) resources, where has been produced a large amount of rare earth concentrate in the past 20 years. Rare earth elements ΣREEs) and other useful elemen
Externí odkaz:
https://doaj.org/article/3a505fa30ddf4d52ac02e02c16dcc33e