scholarly journals Attitude Determination based on Common Reference Clock GPS/BDS Dual Antenna

Author(s):  
Lei Zhang ◽  
Wen Chen ◽  
Chao Yu ◽  
Danan Dong
2013 ◽  
Vol 706-708 ◽  
pp. 1047-1050
Author(s):  
Zhi Jie Wang ◽  
Yan Wen Wang

The paper first introduces the importance of the time synchronization system in the coal mine power supply system and the common reference clock sources, which are GPS and Beidou system. Then, it analyzes the characteristics of the common working modes of time synchronization system. Finally, the time synchronization system in coal mine gird based on host/standby mode and spare each other mode is proposed, which provides significance for the implementation of such technology in coal mine power supply system.


2020 ◽  
Vol 29 (2) ◽  
pp. 206-217
Author(s):  
Jianyuan Ni ◽  
Monica L. Bellon-Harn ◽  
Jiang Zhang ◽  
Yueqing Li ◽  
Vinaya Manchaiah

Objective The objective of the study was to examine specific patterns of Twitter usage using common reference to tinnitus. Method The study used cross-sectional analysis of data generated from Twitter data. Twitter content, language, reach, users, accounts, temporal trends, and social networks were examined. Results Around 70,000 tweets were identified and analyzed from May to October 2018. Of the 100 most active Twitter accounts, organizations owned 52%, individuals owned 44%, and 4% of the accounts were unknown. Commercial/for-profit and nonprofit organizations were the most common organization account owners (i.e., 26% and 16%, respectively). Seven unique tweets were identified with a reach of over 400 Twitter users. The greatest reach exceeded 2,000 users. Temporal analysis identified retweet outliers (> 200 retweets per hour) that corresponded to a widely publicized event involving the response of a Twitter user to another user's joke. Content analysis indicated that Twitter is a platform that primarily functions to advocate, share personal experiences, or share information about management of tinnitus rather than to provide social support and build relationships. Conclusions Twitter accounts owned by organizations outnumbered individual accounts, and commercial/for-profit user accounts were the most frequently active organization account type. Analyses of social media use can be helpful in discovering issues of interest to the tinnitus community as well as determining which users and organizations are dominating social network conversations.


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