EDUCATION:
Polytechnic Institute of NYU: 09/2007 -- 01/2012 (expected)
N-th year Ph.D. Candidate in Computer Science, Polytechnic Institute of NYU, Brooklyn, NY. Advisor: Prof.Torsten Suel.   

Beihang University: 09/2003 -- 06/2007
Bachelor of Science, Beihang University, Beijing, China.

RESEARCH INTEREST:
Web Search Technology
Indexing, inverted index compression, query processing, pruning and caching

Temporal Web Graph and Ranking
Web graph with temporal information, temporal web graph compression, ranking for temporal web graph

GPU-based Computation
GPU-based compression, GPU-based search, GPU-based algorithms

Distributed System
Algorithm under Hadoop framework and its performance issues

SELECTED PROJECTS:

• Optimized Top-K Processing with Global Page Scores on Block-Max Indexes
  With Dongdong Shan, Jing He, Hongfei Yan, Xiaoming Li
  5th ACM Conference on Web Search and Data Mining (WSDM'12)
• Faster TopK Document Retrieval Using Block-Max Indexes
  With Torsten Suel
  The 34th Annual International ACM SIGIR Conference (SIGIR'11)
• Indexing Strategies for Graceful Degradation of Search Quality
  With Sreenivas Gollapudi, Samuel Ieong, Krishnaram Kenthapadi, Alexandros Ntoulas
  The 34th Annual International ACM SIGIR Conference (SIGIR'11)
• Batch Query Processing for Web Search Engines
  with J. Attenberg and R. Baeza-Yates and Torsten Suel
  4th ACM Conference on Web Search and Data Mining (WSDM'11). (oral and presentation, Acceptance rate 8.6%)
• Scalable Techniques for Document Identifier Assignment in Inverted Indexes
  with Josh Attenberg and Torsten Suel
  The 19th International World Wide Web Conference (WWW'10). (Acceptance rate 14%)
• Using Graphics Processors for High Performance IR Query Processing
  with Jinru He, Hao Yan and Torsten Suel
  The 18th International World Wide Web Conference (WWW'09). (Acceptance rate 11.8%) Some codes used there
• Inverted Index Compression&Query Processing with Optimized Document Ordering
  with Hao Yan and Torsten Suel
  The 18th International World Wide Web Conference (WWW'09). (Acceptance rate 11.8%) Some codes used there
• Compressing Term Positions in Web Indexes
  with Hao Yan and Torsten Suel
  The 32nd Annual International ACM SIGIR Conference (SIGIR'09). (Acceptance rate 15.8%)

WORKING EXPERIENCE:
Engineering Intern, Google, Mountain View, CA. Advisor: Marcus Fontoura (05/2011-08/2011)

Research Intern, Microsoft search labs, Microsoft Research, Mountain View, CA. Work with: Krishnaram Kenthapadi, Sreenivas Gollapudi, Alexandros Ntoulas, Samuel Ieong (05/2010-08/2010)

Research Intern, Yahoo Research, Barcelona, Spain. Advisor: Ricardo Baeza-Yates (06/2009-09/2009)

Research Assistant, Polytechnic University, Brooklyn, NY. (10/2007-present)

Technical Intern, Infosys, Bangalore, India. (08/2006-04/2007)

SERVICE:
Program committee member for ECIR 2012

External reviewer for Information Retrieval, TOIS, TKDE, DKE, IPM, SIGIR2011, ICDE2011

Advisor:
Torsten Suel

Other Links:
Yenyu Chen
(Now employee at Yahoo)

Xiaohui Long
(Now employee at Microsoft)

Utku Irmak
(Now employee at Yahoo)

Jiangong Zhang
(Now employee at Amazon)

Qingqing Gan
(Now employee at Microsoft)

Hao Yan
(Now employee at Linkedin)

Josh Attenberg

Jinru He

Raymond Jennings (IBM)

Maria Christoforaki

Constantinos Dimopoulos

Yasemin Avcular

@2011 Yun Xiang