He received his B.A.Sc (First class honors) and Ph.D. in 2001 and 2004 respectively, both in Computer Engineering from NTU. He was a postdoctoral fellow with School of Computer Science and Engineering (CSE) at The University of New South Wales (UNSW), Sydney, Australia. His current research interests include information retrieval, text/web/data mining, social computing, and digital libraries. He has published more than 60 papers in major international conferences and journals such as ACM SIGIR, ACM WSDM, ACM Multimedia, ACM CIKM, ACM/IEEE JCDL, IEEE ICDM, PAKDD, IEEE TKDE, DSS, JASIST, IP&M and KAIS. Aixin is serving as a program committee member of various conferences and reviewer for various journals in the areas of information retrieval, data mining and related areas. He is a member of ACM and a member of IEEE.