He received his Ph.D. from Nagoya University, Japan in 2012, and completed his postdoctoral research at the Chinese University of Hong Kong in 2014. He entered Beijing University of Science and Technology as a lecturer in 2014. He has long been engaged in the research of database theory, focusing on decision support query theory and key technologies, and has achieved innovative research results in the direction-based surrounding nearest neighbor query technology and combined contour query technology. He has published more than 10 academic papers, including SCI 1 paper is included in the district (CCF Class A). Main research directions: spatial database, location-based services, large-scale data processing, data privacy protection, query processing of spatially uncertain data.

2002.9–2006.7 Bachelor, Northeastern University, School of Software
2006.9–2008.7 Master, Northeastern University, Institute of Computer Software and Theory
2009.4–2012.12 PhD, School of Information Science, Nagoya University, Japan
2013.2–2014.2 Postdoctorate, School of Systems Engineering and Engineering Management, Chinese University of Hong Kong

1. Xi Guo, Baihua Zheng, Yoshiharu Ishikawa, and Yunjun Gao. Direction-Based Surrounder
Queries for Mobile Recommendations. In The VLDB Journal, 20 (5), pp. 743-766, 2011. (first author, SCI two-region search, accession number: 824AF)
2. Xi Guo, Chuan Xiao, and Yoshiharu Ishikawa. Combination Skyline Queries. In TLDKS Journal, VI, LNCS 7600, pp. 1-30, Springer, Heidelberg, 2012. (first author, EI index, accession number: 13016946)