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Start Over Author "Wang, Xin-Gang" Publisher elsevier bv
41 results on '"Wang, Xin-Gang"'

6. Cardiotonic Pills® protects from myocardial fibrosis caused by in stent restenosis in miniature pigs

Author

Yan, Lu-Lu, primary, Wei, Xiao-Hong, additional, Shi, Qiu-Ping, additional, Pan, Chun-Shui, additional, Li, Kai-Yin, additional, Zhang, Bin, additional, Wang, Xin-Gang, additional, Zheng, Bo, additional, Wang, Ming-Xia, additional, Yan, Li, additional, Huang, Ping, additional, Liu, Jian, additional, Fan, Jing-Yu, additional, Li, Huan, additional, Wang, Chuan-She, additional, Chen, Ming, additional, and Han, Jing-Yan, additional

Published
2022
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9. A Summary of Research on Frequent Itemsets Mining Technology

Author

Wang Xin gang

Subjects
Association rule learning, Computer science, business.industry, InformationSystems_DATABASEMANAGEMENT, Context (language use), 02 engineering and technology, Data science, ComputingMethodologies_PATTERNRECOGNITION, Information and Communications Technology, 020204 information systems, 0202 electrical engineering, electronic engineering, information engineering, Key (cryptography), General Earth and Planetary Sciences, 020201 artificial intelligence & image processing, The Internet, business, General Environmental Science
Abstract

In recent years, communication technology and Internet technology are developing rapidly. In this context, people pay more and more attention to the importance of data, especially the implied information with timeliness and value, and accessing to such information relies on data mining. Data mining technology has many important branches. In recent years, data mining has been widely concerned about the association rules data mining technology is one of them, and its biggest advantage is the ability to derive valuable, but less significant, patterns from a large amount of information. The key and core problem of association rule data mining is frequent itemsets mining. Based on the research status of frequent itemsets mining technology, the research results and basic ideas of frequent itemsets mining algorithms are discussed and analyzed.

Published
2018

18. Effect of Oxide Particle Size on Electron Emission and Vacuum Arc Characteristic of Mo-La2O3 Cathode

Author

Li Wenjing, Ding Bingjun, Zheng Xueping, Zhang Huailong, Wang Maolin, Liu Lili, and Wang Xin-gang

Subjects
Nanocomposite, Materials science, General Engineering, Oxide, Analytical chemistry, Electron, Vacuum arc, Hot cathode, Cathode, law.invention, chemistry.chemical_compound, chemistry, law, Cathodic arc deposition, Particle size
Abstract

A nanocomposite Mo-4wt% La2O3 cathode was prepared by a high-energy ball-milling and hot pressing technique. The sizes of lanthana particles in the nanocomposite Mo-La2O3 cathode are less than 100 nm; in contrast, the sizes of thoria particles are about 1∼2 μm in a commercial W-4wt% ThO2 cathode. The average vacuum arc-starting field intensity of the nanocomposite Mo-La2O3 cathode is 2.97×107 V/m, which is 62.7% lower than that of the commercial W-ThO2. The nanocomposite Mo-La2O3 cathode exhibits superior electron emission performances, and its distribution area and thickness of electron emission spots are remarkably larger, as compared to those of the commercial W-ThO2 cathode. The size of oxide particles has a great effect on the electron emission performances and vacuum arc characteristics of cathode. The electron emission performance of Mo-La2O3 cathode will be improved with decreasing of the lanthana particles size. When La2O3 particle size decreases to less than 100 nm, the electron emission area and ability of the Mo-La2O3 cathode significantly increase. The much enhanced electron emission performance of the nanocomposite Mo-La2O3 cathode is attributed to the formation of a higher inter electric field and space-charge regions at the interphase boundaries between Mo and La2O3 phases.

Published
2015

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