• Yiqun LIU

• Professor

• Department of Computer Science and Technology

• Joined Department: 2007

• Email:yiqunliu@tsinghua.edu.cn

• URL:http://www.thuir.cn/group/~yqliu

• Phone:+86-10-62796672

• Fax:+86-10-62782266

Education background

Bachelor of Computer Science & Technology, Tsinghua University, Beijing, China, 2003;

Ph.D. in Computer Science & Technology, Tsinghua University, Beijing, China, 2007.

Social service

Co-Chair of the Department of Computer Science and Technology, Tsinghua University

Chair of Beijing ACM SIGIR Chapter

Program Co-Chair of the 41st International ACM SIGIR conference on Information Retrieval (SIGIR2018).

Editorial Board Member of Information Retrieval Journal (IRJ, springer).

Editorial Board Member of Journal of the Association for Information Science and Technology (JASIST)

Co-Editorial in Chief of Foundations and Trends in Information Retrieval (FnTIR).

Program Co-Chair of the 10th International Conference on the Theory of Information Retrieval (ICTIR2020).

Area co-chair of the 56th Annual Meeting of the Association for Computational Linguistics (ACL2018)

Program Co-Chair of NTCIR-13/14 (NII Testbeds and Community for Information Access Research).

General Co-Chair of the Twelfth Asia Information Retrieval Societies Conference (AIRS 2016).

Short Paper Co-Chair of the 40th International ACM SIGIR conference on Information Retrieval (SIGIR2017).

Areas of Research Interests/ Research Projects

Web Information Retrieval, User Behavior Analysis, Natural Language Processing

National Natural Science Foundation of China:Next Generation of Web Information Retrieval (2008-2011);

National Natural Science Foundation of China:Web Spam Page identification Based on User Behavior Analysis (2010-2012);

"Tsinghua-Sohu" Joint Lab on Web Search Technology Research Foundation:Search Engine User Behavior Analysis, Chinese Input Behavior Analysis, Query Recommendation for Search Engine, Web Spam Page Identification, etc (2010-2012).

Research Status

I'm generally interested in the research areas of Web search technology and Web user behavior analysis, and have particular focus on improving search performance with the help of user behavior analysis.

Current commercial search engines face great challenges in the rapid growth of WWW data and user requests. In order to improve their performance, we believe that the behavior information of search users, so called "wisdom of the crowd", can be utilized. With the support of National Natural Science Foundation of China and "Tsinghua-Sohu" Joint Lab on Web Search Technology, tangible progresses were made in this direction.

The aspects of our recent projects cover Web page quality estimation, Web spam page and illegal resource identification, search performance evaluation, on-line advertising performance evaluation, and search engine query recommendation. We have published several high-quality papers in JASIST, WWW, CIKM, WSDM, and some other important journals and conferences. 8 Chinese patents were filed, 3 of which were authorized. Algorithms and systems developed from these projects have been adopted by Sogou.com, one of the most popular search engines in China.

Demos of our research projects can be found at SearchE search engine performance evaluation system and Sogou.com Laboratory home page.

Honors And Awards

Qian Wei-Chang Chinese Information Processing Award: Youth Innovation Prize, 2010

Best Paper Nomination Award / Best Poster Paper Award, Asian Information Retrieval Societies conference, AIRS 2013

Best Paper Nomination Award, Asian Information Retrieval Societies conference, AIRS 2016

Best Paper Award Honorable Mention, SIGIR 2015

Best Student Paper Award, SIGIR 2017

Best Short Paper Award Honorable Mention, SIGIR 2018

Best Overall Paper Award, CIKM 2018

Best Paper Award Honorable Mention, ICTIR 2018

Best Paper Award, AIRS 2018

The Science and Technology Award of Beijing, first grade, 2015.

Academic Achievement

(A complete list of publications can be found at my homepage:http://www.thuir.cn/group/~yqliu/)

[1] Yiqun Liu, Jiaxin Mao."Revisiting information retrieval tasks with user behavior models" by Yiqun Liu and Jiaxin Mao with Martin Vesely as coordinator. ACM SIGWEB Newsletter. February 2020, Article No.: 3, pp 1–8.

[2] Fan Zhang, Jiaxin Mao, Yiqun Liu, Xiaohui Xie, Weizhi Ma, Min Zhang and Shaoping Ma. Models Versus Satisfaction: Towards a Better Understanding of Evaluation Metrics. The 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR2020)

[3] Fan Zhang, Jiaxin Mao, Yiqun Liu, Weizhi Ma, Min Zhang and Shaoping Ma. Cascade or Recency: Constructing Better Evaluation Metrics for Session Search. The 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR2020)

[4] Xiaohui Xie, Jiaxin Mao, Yiqun Liu, Maarten de Rijke, Haitian Chen, Min Zhang and Shaoping Ma. Preference-based Evaluation Metrics for Web Image Search. The 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR2020).

[5] Zhijing Wu, Jiaxin Mao, Yiqun Liu, Jingtao Zhan, Yukun Zheng, Min Zhang, and Shaoping Ma. Leveraging Passage-level Cumulative Gain for Document Ranking. to appear in the Web Conference 2020 (WWW2020).

[6] Jia Chen, Jiaxin Mao, Yiqun Liu, Min Zhang, and Shaoping Ma. A Context-Aware Click Model for Web Search. The 13th International Conference on Web Search and Data Mining (WSDM2020).

[7] Yukun Zheng, Jiaxin Mao, Yiqun Liu, Mark Sanderson, Min Zhang, and Shaoping Ma. Investigating Examination Behavior in Mobile Search. The 13th International Conference on Web Search and Data Mining (WSDM2020).

[8] Jiaxin Mao, Zhumin Chu, Yiqun Liu, Min Zhang, and Shaoping Ma. Investigating the Reliability of Click Models. The 5th ACM SIGIR International Conference on the Theory of Information Retrieval (ICTIR2019 Best Short Paper Honorable Mention).

[9] Yukun Zheng, Jiaxin Mao, Yiqun Liu, Cheng Luo, Min Zhang, and Shaoping Ma. 2019. Constructing Click Model for Mobile Search with Viewport Time. ACM Transactions on Information Systems (TOIS). Volume 37 Issue 4.

[10] Yiqun Liu, Junqi Zhang, Jiaxin Mao, Min Zhang, Shaoping Ma, Qi Tian, Yanxiong Lu, Leyu Lin. Search Result Reranking with Visual and Structure Information Sources. ACM Transactions on Information Systems (TOIS). Volume 37 Issue 3.

[11] Yunqiu Shao, Yiqun Liu, Fan Zhang, Min Zhang and Shaoping Ma. On Annotation Methodologies for Image Search Evaluation. ACM Transactions on Information Systems (TOIS). Volume 37 Issue 3.

[12] Xiaohui Xie, Jiaxin Mao, Yiqun Liu, Maarten de Rijke, Yunqiu Shao, Zixin Ye, Min Zhang and Shaoping Ma. Grid-based Evaluation Metrics for Web Image Search. The Web Conference 2019 (WWW2019).

[13] Yingying Wu, Yiqun Liu, Yen-Hsi Richard Tsai, Shing-Tung Yau. Investigating the Role of Eye Movements and Physiological Signals in Search Satisfaction Prediction Using Geometric Analysis. Journal of the Association for Information Science and Technology (JASIST) 2019.