..............page:1-6+12
Study on subsidence types and their influence factors of coal mine goaf in Inner Mongolia
Huang Kun;Chen Wei;Wen Aishu;Zhao Zhenguang;Chen Jianxin;Zhang Zhongjian;Nonferrous Geological Prospecting Bureau of the Inner Mongolia Autonomous Region;Department of land and resources of the Inner Mongolia Autonomous Region;Geological Environmental Monitoring Institute of the Inner Mongolia Autonomous Region;School of Engineering and Technology;China University of Geosciences;
..............page:13-19
..............page:20-24+69
..............page:52-55+64
Precision analysis of LNAV broadcast ephemeris
Wang Ahao;Wang Jiexian;Chen Junping;College of Surveying and Geo-Informatics;Tongji University;Shanghai Astronomical Observatory;Chinese Academy of Science;Shanghai Key Laboratory of Space Navigation and Positioning Technology;Chinese Academy of Science;
..............page:65-69