Zobrazeno 1 - 10
of 1 408
pro vyhledávání: '"QU Wen"'
Political scientists often grapple with data scarcity in text classification. Recently, fine-tuned BERT models and their variants have gained traction as effective solutions to address this issue. In this study, we investigate the potential of GPT-ba
Externí odkaz:
http://arxiv.org/abs/2411.05050
Publikováno v:
Yankuang ceshi, Vol 39, Iss 6, Pp 878-885 (2020)
OBJECTIVES Ion-adsorption type rare earth ore is extremely important in China and rare in the world. It is China's dominant mineral resource. At present, all the rare earth elements in the existing REE reference materials are oxide minerals, not ion-
Externí odkaz:
https://doaj.org/article/d30f1579d2734baba2f0b7eabc40c3e3
Autor:
LI Chao, WANG Deng-hong, QU Wen-jun, MENG Hui-ming, ZHOU Li-min, FAN Xing-tao, LI Xin-wei, ZHAO Hong, WEN Hong-li, SUN Peng-cheng
Publikováno v:
Yankuang ceshi, Vol 39, Iss 5, Pp 658-669 (2020)
BACKGROUND Strategic critical metal mineral resources including rare, dispersed, rare earth and platinum group elements play an increasingly critical role in emerging industries such as new materials, new energy and information technology. With the d
Externí odkaz:
https://doaj.org/article/5f9618855f4f4f178a0e6d3409b6805e
Publikováno v:
Yankuang ceshi, Vol 37, Iss 5, Pp 518-525 (2018)
BACKGROUND The accurate determination of ionic phase rare earths in ion-adsorption rare earths is of great significance for the evaluation of rare earth ore bodies. Ionic phase rare earths are adsorbed on clay minerals in the form of hydroxyl or hydr
Externí odkaz:
https://doaj.org/article/5d06845f040e44c18a7832d991f11293
Publikováno v:
Yankuang ceshi, Vol 37, Iss 4, Pp 431-438 (2018)
BACKGROUND Os can be separated from the sample matrix by distillation, and the absorbing liquid can be introduced into ICP-MS directly, which is a key step of the molybdenite Re-Os isotopic age analysis. However, the Os signal intensity declines sign
Externí odkaz:
https://doaj.org/article/2eff941b1e5043769cf7755cac985d1d
Given that natural language serves as the primary conduit for expressing thoughts and emotions, text analysis has become a key technique in psychological research. It enables the extraction of valuable insights from natural language, facilitating end
Externí odkaz:
http://arxiv.org/abs/2403.02504
Publikováno v:
Yankuang ceshi, Vol 36, Iss 3, Pp 297-304 (2017)
Graphite has relatively high Re and Os contents and is an ideal mineral for Re-Os isotope dating. However, there are few studies on Re-Os dating of graphite. Particularly for the graphite which was formed by deformation of coal beds, the variation in
Externí odkaz:
https://doaj.org/article/fd22592b56b94322ba713fdce7b73cce
Publikováno v:
Yankuang ceshi, Vol 36, Iss 3, Pp 318-325 (2017)
Volcanic rocks in the Xiemisitai Mountains, in Northwest Junggar were recently considered to form in the Silurian rather than the Devonian period. However, the characteristic and tectonic setting of Middle Silurian volcanic rocks in this area are poo
Externí odkaz:
https://doaj.org/article/c1f926d8326140d3be598eb2c5a988d1
Publikováno v:
Yankuang ceshi, Vol 35, Iss 1, Pp 24-31 (2016)
Re-Os isotope method is a powerful tool for dating ore deposits, but digesting samples with the Carius tube is complicated and dangerous.A simple and quick method to determine the age of molybdenite Re-Os and Re content has been established.5-15 mg o
Externí odkaz:
https://doaj.org/article/ea2244aabac04c6c8dbd3539f2379503
Publikováno v:
Yankuang ceshi, Vol 33, Iss 5, Pp 737-746 (2014)
Guangdong has abundant kinds of rare earth element resources. The resource which could satisfy the industry exploitation is only the ion adsorption type of rare earth ores. According to previous survey, Guangdong possesses heavy rare earth element re
Externí odkaz:
https://doaj.org/article/f816c38242d04deaa179c0757a322df4