His research interests intersects natural language processing, information retrieval, social computing, and artificial intelligence. He published over 80 papers and articles in the major international conferences and journals including ACL, EMNLP, SIGIR, CIKM, WSDM, IJCAI, ACM TOIS, ACM TIST, IEEE TKDE, etc. He served in the program committees as area chairs and reviewers for a good number of international conferences and reviewed for numerous top journals in the relevant research areas. He was the workshop co-chair of BigComp 2016 and the tutorial co-chair of IJCNLP 2011.