My major research focuses on the areas of information retrieval, big data and their applications to the Web and medical healthcare. In particular, my research activities focus on:
(1) statistical models and machine learning for information retrieval; (2) big data analytics with complex structures;
(3) contextual information retrieval and Web personalization;
(4) biomedical text retrieval and mining;
(5) high accuracy retrieval from terabyte scale data sets;
(6) Cross-language and Chinese information retrieval;
(7) Web search and mining;
(8) decision support for personalized health care.