I graduated with Ph.D. degree in Computer Science at June 2006 and is working for Live Search of Microsoft now. My advisor is Prof. Torsten Suel and I was working in the Web Exploration and Search Technology Lab of Computer and Information Science Department of Polytechnic University at Brooklyn, New York. My dissertation work was focused on high performance index architecture and optimized query processing on large scale web search engines. I am also interested in machine learning and data mining. I received my master degree and bachelor degree in Computer Science from Department of Computer Science and Technology of Nanjing University, China.