State Key Laboratory of Resources & Environmental Information System Institute of Geographical Sciences and Natural Resources Research 11A Datun Road, Beijing 100101
Phone: 86-10-64888962
Fax: 86-10-64889630

xujun@lreis.ac.cn

EDUCATION
Ph.D. in Geographical Information System, Department of Geography, State University of New York at Buffalo, July 2005.
Thesis Topic: “Natural-language Representation and Query of Linear Geographic Objects in GIS”
M.S. in Geomorphology and Quaternary Geology, Department of Geography, Peking University, Beijing, China, July 1997
Thesis Topic: “Tectonic Geomorphology Classification and Mapping of Hexi Corridor”
B.S. in Geography, Anhui Normal University, Department of Geography, Wuhu City, Anhui Province, China, July 1994

REASERCH INTEREST
Geographical ontology, spatial knowledge representation and qualitative reasoning, spatial data mining

PROFESSIONAL EXPERIENCE
Associate Professor, State Key Laboratory of Resources & Environmental Information System, Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing, China, 2006 to present.
Assistant Professor, State Key Laboratory of Resources & Environmental Information System, Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing, China, 2005 to 2006.

RESEARCH PROJECT
Group recommendation of geographic information services based on semantic enrichment of events, sponsored by Natural Science Foundation of China, 2018 to 2021.
Acquiring and applying context in geographical information retrieval, sponsored by Natural Science Foundation of China, 2014 to 2017.
Intelligent natural-language spatial relation query system based on geographic cognition, sponsored by Natural Science Foundation of China, 2008 to 2010.
Quantification of geographic semantics and soft knowledge, sponsored by Fund for Innovation from the State Key Laboratory of Resources and Environmental Information Systems, 2008 to 2009.
Comparing understanding of spatial relations in English and Chinese, sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education, 2007 to 2008.
The understanding and intelligent queries of spatial relations in geographical databases, sponsored by Knowledge Innovation Research Fund of Institute of Geographical Sciences and Natural Resources Research, 2006 to 2007.

PUBLICATIONS
 Journal Papers:
Zhou C., Su F., Pei T., Zhang A., Du Y., Luo B., Cao Z., Wang J., Yuan W., Zhu Y., Song C, Cheng J., Xu J., Li F., Ma T., Jiang L., Yan F., Yi, J., Hu, Y., Liao Y, Xiao H. 2020. COVID-19: Challenges to GIS with Big Data. Geography and Sustainability, doi: https://doi.org/10.1016/j.geosus.2020.03.005
Zhou C.H., Pei T., Du Y.Y., Chen J., Xu J., Wang J.E., Zhang G.Y., Su F.Z., Song C, Yi, J.W., Ma T., Ge Y., Zhang A., Jiang L.L. 2020. Big data analysis on COVID-19 epidemic and suggestions on regional prevention and control policy. Bulletin of Chinese Academy of Sciences, 35(2): 200-203.
Liu J., Chen C., Xu J. 2019. Spatiotemporal analysis of trajectories of guqin celebrities based on crowdsourcing data. Journal of Geo-information Science, 21(6): 844-853. doi: 10.12082/dqxxkx.2019.180575
Cai L., Xu J., Liu J., Ma T., Pei T., Zhou CH. 2019. Sensing multiple semantics of urban space from crowdsourcing positioning data. Cities, 93:31-42. doi: 10.1016/j.cities.2019.04.011
Liu J., Xu J., Cai L., Meng B., Pei T. 2018. Identifying functional regions based on the spatio-temporal pattern of taxi trajectories. Journal of Geo-information Science, 20(11):1550-1561. doi: 10.12085/dqxxkx.2018.180164
Cai, L., Xu, J., Liu, J., and Pei, T. 2018. Integrating spatial and temporal contexts into a factorization model for POI recommendation. International Journal of Geographical Information Science, 32(3): 525-546. doi: 10.1080/13658816.2017.1400550
Liu X., Pei, T., Zhou, C.H., Du, Y., Ma, T., Xie, C., Xu, J. 2018. A systems dynamic model of a coal-based city with multiple adaptive scenarios: A case study of Ordos, China. Science China Earth Sciences, 61(3): 302–316. doi: 10.1007/s11430-016-9077-5
Xu, J., Li, A., Li, D., Liu, Y., Du, Y., Pei, T., and Ma, T. 2017. Differentiation of urbanization in China from the perspective of passenger transport around Spring Festival. Applied Geography, 87: 85-96. DOI: 10.1016/j.apgeog.2017.07.014
Cai, L., Xu, J., Li, A. 2017. Hybrid group recommendation with enhanced group preferences. Computer Engineering and Applications, 53(9): 5-10.
Li, A., Xu, J. 2016. Spatial cascaded model for personalized recommender system. Journal of Geo-information Science, 18(2): 160-166.
Chen, Y., Xu, J., and Xu, M. 2015. Finding community structure in spatially constrained complex networks. International Journal of Geographical Information Science, 29(6): 889-911.
Xu. M., Xu, J., Chen, Y. 2014. Construction of Chinese aviation hub-spoke structure based on maximum leaf spanning tree. ACTA Geographic Sinica, 69(12): 1847-1857.
Xu. M., Xu, J., Chen, Y. 2014. The calculation of connected dominating centrality in complex network. Complex System and Complexity Science, 11(4): 41-47.
Xu. M., Xu, J., 2014. Context-aware geographical information retrieval. Geography and Geo-information Science, 30(1): 1-7.
Chen, Y., Xu, J. Xu, M. 2013. A fast algorithm of spatial clustering based on agglomeration  . Geography and Geo-information Science, 29(4): 104-108.
Chen, Y., Xu, J. 2013. A Distance-based Method of Community Detection in Complex Networks. Journal of Geo-information Science, 15(3): 338-344.
Zhong, K., Xiao, Y., Xu, J., Ma, F., Liu, Y., Wu. L. 2012. Measuring city centralities based on the train network of China. Journal of Geo-information Science, 14(1): 85-93.
Xu, J., Pei, T., Yao, Y. 2010. Conceptual framework and representation of geographic knowledge map. Journal of Geo-information Science, 12(4): 496-502.
Du, C., Si, W., Xu, J. 2010. Querying and reasoning of spatial relations based on geographic semantic. Journal of Geo-information Science, 12(1):48-55.
Ge, Y., Xu, J. Liu Q., Yao, Y., and Wang, R. 2009. Image interpretation and statistical analysis of vegetation damage caused by the Wenchuan earthquake and related secondary disasters. Journal of Applied Remote Sensing, Vol. 3, 031660.
Xu, J. 2008. Natural-language Understanding of Spatial Relations between Linear Geographic Objects (in Chinese). Geo-Information Science, 10(3): 363-369.
Xu, J., Zhang, J., Si, W.L., and Sun, H.J. 2008. Bi-linguistic study of natural-language understanding of spatial relations in Chinese and English. Journal of Remote Sensing, 12(2): 362-369.
Xu, J., and Mark, D.M. 2007. Natural language understanding of spatial relations between linear geographic objects. Spatial Cognition and Computation, 7(4): 311-347.
Xu, J. 2007. Formalize natural-language spatial relations between linear objects with topologic and metric properties. International Journal of Geographical Information Science, 21(4): 377-395.
Xu, J. 2007. Formalizing the natural-language descriptions about the spatial relations between linear geographic objects. Journal of Remote Sensing, 11(2): 152-158.
Su, F., Yang, X., Xu, J., Zhang, T., and Luo, J. 2006. Basic theory and key technologies for marine geographic system. ACTC Oceanologica Sinica, 25(2): 80-66.
Wang, X., Wang, Q., Wu. Q., and Xu, J. 2003. Estimating Suspended Sediment Concentration in Coastal Waters of Minjiang River Using Remote Sensing Images. Journal of Remote Sensing, 7(1): 54-57.
Wang, S., Xu, J., Zhou, C., He, C. 2002. Using remote sensing to estimate the change of carbon storage: a case study in the estuary of Yellow River delta. International Journal of Remote Sensing, 23(8): 1565-1580.
Fang, H., Xu, J. 2000. Land cover and vegetation change in the Yellow River Delta Nature Reserve analyzed with Landsat Thematic Mapper data. Geocarto International, 15(4): 41-47.
Xu, J., Fu, S., Huang, X. 2000. Application of Remote Sensing and GIS in Environment Background of Water Quality Analysis. Environmental Science, 21(4): 1-5.
Xu, J., Li, C., Huag, X. 2000. Application of Linear Spectral Mixture Analysis in Extracting Areca Thematic Information from SPOT Image. Remote Sensing Technology and Application, 15(1): 55-59.
Xu, J., Fang, H., Fu, S., Huang, X. 1999. SPOT Image used in River Water Suspended Sediment and Its Environmental Background Analysis. The Journal of Chinese Geography, 9(4): 402-409.
Xu, J., Fang, H., Fu, S., Huang, X. 1999. Estimating Suspended Sediment Concentrations from SPOT Image: A Case Study in Danshuihe, Taiwan. Remote Sensing Technology and Application, 14(4): 17-22.
Xu, J., Fu, S., Huang, X. 1999. The Water Quality and Environment Background Remote Sensing Mapping and Analysis in Jilong River Watershed, Taiwan. Progress in Geography, 18(3): 267-273.
 Book Chapters:
Pei, T., Xu, J., Gong, J., Liu, X., Wang, J., Du, S., Qin, C., Yang, L. and Wan. Y. 2017. Spatial Analysis and Simulation. In The Geographical Sciences During 1986—2015: From the Classics to the Frontiers, 339-366. Singapore: Springer Singapore. DOI: 10.1007/978-981-10-1884-8_15
Zhou, C., Pei, T., Xu, J., Ma, T., Fan, Z. and Wang. J. 2018. Urban Dynamics and GIScience.  In B Huang, Comprehensive Geographic Information Systems, 297-312. Oxford: Elsevier. DOI: 10.1016/B978-0-12-409548-9.10539-1
 Conference Papers and Presentations:
Xu, J. and Ju Liu. 2019. Visualized analysis of short and long-distance human mobility on the Qinghai-Tibetan Plateau with crowd sourcing data (present). Geoinformatics’19, Sydney, Australia, July 1-3, 2019.
Cai, L. and Xu, J. 2017. Experiments on item’s order in word2vec based recommendation (present). Third International Conference on Spatial Data Mining and Geographical Knowledge Services, Wuhan, China, August 21-22, 2017.
Cai, L., Xu, J., and Zhang, J. 2017. Sensing the Urban Space with Crowdsourced Positioning Data (present). Geoinformatics’17, Buffalo, NY, August 2-5, 2017.
Zhang, X., and Xu, J. 2011. Construction of geo-ontology knowledge base about spatial relations. ICSDM 2011 - Proceedings 2011 IEEE International Conference on Spatial Data Mining and Geographical Knowledge Services, pp. 234-237.
Du, C., Xu, J., Zhang, J., Si, W.L., Liu, B., Zhang, D.P. 2009. Spatial relation query based on geographic ontology (poster). The 6th International Symposium on Digital Earth (ISDE6), Beijing, China, September 9-12.
Xu, J., Yao, Y., Pei, T., and Yao, C. 2009. Geographic knowledge map and its application in seismic knowledge representation. Geoinformatics’09, Fairfax, VA, August 12-14.
Xu, J. 2009. Natural language queries on spatial relations bases on geographic syntax (present). Symposium on Electronic Map Design and Geo-visualization, Nanjing, China, July 3-6.
Xu, J., Zhang, J., Si, W.L., and Sun, H.J. 2007. Bi-linguistic study of natural-language understanding of spatial relations in Chinese and English (poster). The 8th International Conference, COSIT’07, Melbourne, Australia, September 2007.
Xu, J., Yao, C. 2006. Formalizing natural-language spatial relations descriptions with fuzzy decision tree algorithm. In Proceedings of SPIE, Volume 6420, Geoinformatics, Wuhan, China, October 28-29, 2006, pp. 64201E-1-10.
Xu, J., Mark, D.M. 2005. Natural-language understanding of spatial relations between linear geographic objects: a human-subjects test (present). The 101st AAG Annual Meeting, Denver, Colorado, April 5-9.
Xu, J. 2004. Spatial Knowledge Representation and Reasoning in Natural Language (present). The 100th AAG Annual Meeting, Philadelphia, Pennsylvania, March 15-19.
Xu, J. 2003. Implement an Intelligent ArcView User Interface Using SNePS. In Proceeding of the 23rd Annual ESRI User Conference, San Diego, California, July 7-11, 2003.
Xu, J. 2003. An Intelligent Natural-language Interface for ArcView (poster). UCGIS 2003 Summer Assembly, student competition, June 15 – June 19, Pacific Grove, California.
Xu, J. 2002. Detect Seasonal Pattern Change of DVAs in the Town of Amherst Using Network K-Function (poster). UCGIS 2002 Summer Assembly, student competition, June 26 - June 30, Atlanta, Georgia.
Xu, J., Wang, S. 2002. Remote Sensing Used in Land-use Change Detection and Driving Factors Analysis (present). The 98th AAG Annual Meeting, Los Angeles, California, March 19-23.
Xu, J., Li, C., Huang, X. 1999. Application of Linear Spectral Mixture Analysis in Extracting Areca Thematic Information from SPOT Image (present).  The Youth Forum of the 20th Asian Conference on Remote Sensing, Hong Kong.
 Books:
Zhou, C.H., Su, F.Z., Harvey, F., Xu, J.(Eds.) 2017. Spatial Data Handling in Big Data Era: Select Papers from the 17th IGU Spatial Data Handling Symposium 2016. Springer.