Research area: Web Information Retrieval, User Behavior Analysis, Machine Learning, Artificial
Intelligence.
Selected Publications
In the year of 2013
Yongfeng Zhang, Min Zhang, Yiqun Liu, Shaoping Ma and Shi Feng. Localized Matrix Factorization for Recommendation based on Matrix Block Diagonal Forms. The 22nd International World Wide Web conference (WWW2013).
Chao Wang, Yiqun Liu, Min Zhang, Shaoping Ma, Meihong Zheng, Jing Qian, Kuo Zhang. Incorporating Vertical Results into Search Click Models. The 36th ACM SIGIR conference (SIGIR 2013).
Jianxun Cao, Yiqun Liu, Rongwei Cen, Shaoping Ma, Liyun Ru. Identifying Porn Sites with User Behavior Analysis. Journal of Computer Research and Development. 50(2):430-436. 2013 (in Chinese)
Yongfeng Zhang, Min Zhang, Yiqun Liu, Shaoping Ma. Improve Collaborative Filtering Through Bordered Block Diagonal Form Matrices. The 36th ACM SIGIR conference (SIGIR 2013).
In the year of 2012
Yiqun Liu, Yufei Xue, Danqing Xu, Ronwei Cen, Min Zhang, Shaoping Ma, Liyun Ru. Constructing a Reliable Web Graph with Information on Browsing Behavior. Decision Support Systems (2012) 54:390-401. doi:10.1016/j.dss.2012.06.001. Preprint PDF
Chao Wei, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma, Kuo Zhang. Fighting against Web Spam: A Novel Propagation Method based on Click-through Data. Accepted by Proceedings of the 35th Annual ACM SIGIR Conference (SIGIR2012). Preprint PDF
Danqing Xu, Yiqun Liu, Min Zhang and Shaoping Ma. Incorporating Revisiting Behaviors into Click Models. Proceedings of the 5th ACM International Conference on Web Search and Data Mining . WSDM 2012 (Seattle, U.S.). pp. 303-312. PDF
Yiqun Liu, Fei Chen, Weize Kong, Huijia Yu, Min Zhang, Shaoping Ma, Liyun Ru. Identifying Web Spam with the Wisdom of the Crowds. ACM Transaction on the Web. Volume 6, Issue 1, Article No. 2, 30 pages. March 2012. Preprint PDF
Yuchen Tian, Yiqun Liu, Danqing Xu, Ting Yao, Min Zhang and Shaoping Ma. Incorporating Seasonal Time Series Analysis with Search Behavior Information in Sales Forecasting. Accepted by Proceedings of the 21th international Conference on World Wide Web (WWW 2012). pp. 615-616. Preprint PDF
In the year of 2011
Yiqun Liu, Junwei Miao, Min Zhang, Shaoping Ma, Liyun Ru. How Do Users Describe Their Information Need: Query Recommendation based on Snippet Click Model. Expert Systems With Applications. 38(11): 13847-13856, 2011. Preprint PDF
Bo Zhou, Yiqun Liu, Min Zhang, Yijiang Jin, Shaoping Ma, Incorporating Web Browsing Information into Anchor Texts for Web Search, Information Retrieval Volume 14, Issue 3: 290-314, 2011. PDF
Danqing Xu, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. Predicting Epidemic Tendency through Search Behavior Analysis. In Proceedings of the 22nd International Joint Conference on Artificial Intelligence (IJCAI-11) (Barcelona, Spain). pp. 2361-2366. PDF
Jiazhuo Wang, Yiqun Liu, Shaoping Ma, Min Zhang. Sponsored Search Performance Analysis based on User Behavior Information. Journal of Computer Research and Development Vol.48(1):133-138. 2011.1. (in Chinese)
Qi Fang, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. Topic identification for Session Segmentation of Web Access Logs. Journal of Chinese Information Processing, Vol.25(1): pp. 35-40. 2011.1 (in Chinese)
Weize Kong, Yiqun Liu, Min Zhang, Shaoping Ma. Answer Quality Analysis on Community Question Answering. Journal of Chinese Information Processing, Vol.25(1): pp. 3-8. 2011.1 (in Chinese)
Danqing Xu, Yiqun Liu, Rongwei Cen, Shaoping Ma, Liyun Ru, Lei Yang. Research on User Input Behavior Based on Log Analysis of a Chinese Input Method. Journal of Chinese Information Processing, Vol.25(2): pp. 44-48. 2011.3 (in Chinese)
In the year of 2010
Rongwei Cen, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. Reliable Analysis for the Behavior of Web Retrieval Users(In Chinese). Journal of Software. Vol.21(5):1055-1066, 2010.5. PDF
Rongwei Cen, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. 2010. Study language models with specific user goals. In Proceedings of the 19th international Conference on World Wide Web (Raleigh, North Carolina, USA, April 26 - 30, 2010). WWW '10. ACM, New York, NY, 1073-1074. ACM
Weize Kong, Yiqun Liu, Shaoping Ma and Liyun Ru. 2010. Detecting epidemic tendency by mining search logs. In Proceedings of the 19th international Conference on World Wide Web (Raleigh, North Carolina, USA, April 26 - 30, 2010). WWW '10. ACM, New York, NY, 1133-1134. ACM
Qianli Xing, Yiqun Liu, Rongwei Cen, Min Zhang, Shaoping Ma and Liyun Ru. 2010. Are search engine users equally reliable?. In Proceedings of the 19th international Conference on World Wide Web (Raleigh, North Carolina, USA, April 26 - 30, 2010). WWW '10. ACM, New York, NY, 1207-1208. ACM
Guichun Hua, Min Zhang, Yiqun Liu, Shaoping Ma and Liyun Ru. 2010. Hierarchical feature selection for ranking. In Proceedings of the 19th international Conference on World Wide Web (Raleigh, North Carolina, USA, April 26 - 30, 2010). WWW '10. ACM, New York, NY, 1113-1114. ACM
Rongwei Cen, Yiqun Liu, Min Zhang, Liyun Ru and Shaoping Ma. Abnormal Click Analysis in Web User Access Logs. Journal of Chinese Information Processing, Vol.24(3): pp. 44-48. 2010.5 (in Chinese)
Qian Wang, Yiqun Liu, Shaoping Ma and Liyun Ru. Search Engine User Behavior Analysis Based on Log Mining Journal of Chinese Information Processing, Vol.24(3): pp. 49-54. 2010.5 (in Chinese)
Bo Zhou, Rongwei Cen, Yiqun Liu, Min Zhang, Yijiang Jin and Shaoping Ma. A Document Relevance Based Search Result Re-Ranking. Journal of Chinese Information Processing, Vol.24(3): pp. 19-23. 2010.5 (in Chinese)
In the year of 2009
Yiqun Liu, Yijiang Jin, Min Zhang, Shaoping Ma and Liyun Ru. User Browsing Graph: Structure, Evolution and Application. Late breaking result session in Second ACM International Conference on Web Search and Data Mining (WSDM 2009). 2009.2 PDFSLIDES
Rongwei Cen, Yiqun Liu, Min Zhang, Bo Zhou, Liyun Ru, Shaoping Ma. Exploring Relevance for Clicks. In Proceeding of the 18th ACM Conference on information and Knowledge Management (Hong Kong, China, November 02 - 06, 2009). CIKM '09. ACM, New York, NY, 1847-1850. ACM
Rongwei Cen, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. Web Observation from a User Perspective. In Proceedings of the 2009 IEEE/WIC/ACM international Joint Conference on Web intelligence and intelligent Agent Technology - Volume 01 (September 15 - 18, 2009). Web Intelligence & Intelligent Agent. IEEE Computer Society, Washington, DC, 291-294.PDF
Huijia Yu, Yiqun Liu, Min Zhang, Shaoping Ma and LiYun Ru. Web Spam Identification with User Browsing Graph. Asia Information Retrieval Symposium 2009 (AIRS 2009), also in Springer LNCS 5839, pp. 38-49, 2009.11.
Rongwei Cen, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. Study on the Click Context of Web Search Users for Reliability Analysis. Asia Information Retrieval Symposium 2009 (AIRS 2009), also in Springer LNCS 5839, pp. 397¨C408, 2009.11.
Rongwei Cen, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. Automatic Search Engine Performance Evaluation with the Wisdom of Crowds. Asia Information Retrieval Symposium 2009 (AIRS 2009), also in Springer LNCS 5839, pp. 351¨C362, 2009.11.
Huijia Yu, Yiqun Liu, Min Zhang, Shaoping Ma and Liyun Ru. Web Spam Taxonomy via Spam Intention Analysis. Journal of Chinese Information Processing, Vol.23(2): pp. 95-101. 2009.3 (in Chinese)
Yiqun LIU, Bo ZHOU, Min ZHANG, Shaoping MA, Liyun RU, Effectiveness of Online Sponsored Search Based on User Log Analysis. Journal of Computational Information Systems. (Accepted) Preprint PDF
In the year of 2008
Yiqun Liu, Min Zhang, Shaoping Ma, Liyun Ru. User behavior oriented web spam detection. In Proceeding of the 17th international Conference on World Wide Web (Beijing, China, April 21 - 25, 2008). WWW '08. ACM, New York, NY, 1039-1040. ACM
Yiqun Liu, Rongwei Cen, Min Zhang, Shaoping Ma, Liyun Ru. Identifying Web Spam with User Behavior Analysis. The Fourth International Workshop on Adversarial Information Retrieval on the Web. 2008.4. ACM
Yiqun Liu, Rongwei Cen, Min Zhang, Shaoping Ma. Automatic Search Engine Evaluation Based On User Behavior Analysis (in Chinese). Journal of Software, Vol.19(11):3023-3032. 2008.11. Preprint PDF
Yong Wang, Yiqun Liu, Min Zhang, Shaoping Ma, Liyun Ru, Identify Temporal Websites Based on User Behavior Analysis, The Third International Joint Conference on Natural Language Processing, Hyderabad, India, January 7-12, 2008
Yong Wang, Yiqun Liu, Min Zhang, Shaoping Ma, News Page Discovery Policy for Instant Crawlers, Asia Information Retrieval Symposium 2008, Harbin, China, January 16-18, 2008
Yong Wang, Yiqun Liu, Min Zhang, Ma Shaoping, Ru Liyun, Modeling Lifetime of Web Pages Based on User Interest Analysis, Journal of Chinese Information Processing, Vol.22(2): pp. 76-80. 2008.3. (in Chinese)
Shaoping Ma, Yiqun Liu. Method for finding needle in a haystack: Techniques and challenges in Chinese Web information retrieval (in Chinese). Communications of China Computer Federation, 2008.1. Preprint PDF
Lei Chen, Yiqun Liu, Liyun Ru, Shaoping Ma. Effectiveness of Online Sponsored Search Based on User Log Analysis. Journal of Chinese Information Processing, Vol.22(6): pp. 92-97. 2008.11 (in Chinese)
In the year of 2007
Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma. Data Cleansing for Web Information Retrieval using Query Independent Features. Journal of the American Society for Information Science and Technology (JASIST), Volume 58, Issue 12, Pages 1884-1898, 2007. Preprint PDF
Yiqun Liu, Yupeng Fu, Min Zhang, Liyun Ru, Shaoping Ma. 2007. Automatic search engine performance evaluation with click-through data analysis. In Proceedings of the 16th international Conference on World Wide Web (Banff, Alberta, Canada, May 08 - 12, 2007). WWW '07. ACM, New York, NY, 1133-1134. ACMPOSTER
Yiqun Liu, Min Zhang, Shaoping Ma. Web key resource page selection based on non-content information (in Chinese). CAAI Transactions on Intelligent Systems, 2(1), 2007. PDF
Huijia Yu, Yiqun Liu, Min Zhang, Liyun Ru and Shaoping Ma, Research in Search Engine User Behavior Based on Log Analysis (in Chinese). Journal of Chinese Information Processing. Vol. 21(1): pp. 109-114, 2007. PDF
Yupeng Fu, Rongjing Xiang, Yiqun Liu, Min Zhang, Shaoping Ma: A CDD-based formal model for expert finding. In Proceedings of the Sixteenth ACM Conference on Conference on information and Knowledge Management: 881-884.
Yupeng Fu, Rongjing Xiang, Yiqun Liu, Min Zhang, Shaoping Ma: Finding Experts Using Social Network Analysis. In Proceedings of the IEEE/WIC/ACM international Conference on Web intelligence (Web Intelligence) 2007: 77-80.
Before the year of 2007
Yiqun Liu, Canhui Wang, Min Zhang, Shaoping Ma, Learning-based Web Data Cleansing for Information Retrieval, Journal of Computational Information Systems, Vol 1(n4): pp. 709-716, 2005. Preprint PDFSLIDES
Yiqun Liu, Min Zhang, Shaoping Ma, Effective Topic Distillation with Key Resource Pre-selection, Lecture Notes in Computer Science, Volume 3411, pp. 129-140, 2004. PDFSLIDES
Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma, Automatic Query Type Identification Based on Click Through Information, Asia Information Retrieval Symposium, AIRS 2006, in Lecture Notes in Computer Science Vol. 4182: pp. 593-600, 2006. PDFPOSTER
Yiqun Liu, Canhui Wang, Min Zhang, and Shaoping Ma. 2005. Web data cleansing for information retrieval using key resource page selection. In Special interest Tracks and Posters of the 14th international Conference on World Wide Web (Chiba, Japan, May 10 - 14, 2005). WWW '05. ACM, New York, NY, 1136-1137. PDFPOSTER
Yiqun Liu, Min Zhang, Shaoping Ma. Web Key Resource Page Selection Based On Improved Decision Tree Algorithm. (in Chinese) Journal of software, Vol. 16(11): pp. 1958-1966, 2005. PDF
Yiqun Liu, Canhui Wang, Min Zhang, Shaoping Ma, Finding "Abstract Fields" of Web Pages and Query Specific Retrieval--THUIR at TREC 2004 Web Track, NIST Special Publication: SP 500-261, Proceedings of the Thirteenth Text Retrieval Conference (TREC 2004).PDF from TREC website
Yiqun Liu, Min Zhang, Shaoping Ma. Effective Web IR Based on Virtual Site Entry Page Selection (in Chinese). Journal of Chinese Information Processing, Vol. 19(2): pp. 44-50, 2005. PDF
Yiqun Liu, Min Zhang, Shaoping Ma. Web Data Cleansing for Effective Information Retrieval (in Chinese). Journal of Chinese Information Processing. Vol. 20(3): pp. 70-77, 2006. PDF
Yiqun Liu, Min Zhang, Shaoping Ma. Review of User Behavior Analysis in Web IR Research (in Chinese). The 7th Joint Symposium on Computational Linguistics (JSCL2005). pp 488-494, 2005. PDF
Yiqun Liu, Min Zhang, Liyun Ru and Shaoping Ma, Data Cleansing for Web Information Retrieval using Query Independent Features. Proceedings of the 1st China-Kyoto International Student Workshop on Digital Content and Web Computing. 2006.3. PDFSLIDES
Canhui Wang, Yiqun Liu, Min Zhang, and Shaoping Ma. Topic-Independent Web High-Quality Page Selection Based on K-Means Clustering. Asia Information Retrieval Symposium, 2005. Lecture Notes in Computer Science, Volume 3689, pp.516-521. PDF
Rongwei Cen, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma, Web Page Quality Estimation Based on Linear Discriminant Function, Journal of Computational Information Systems.
Rongwei Cen, Yiqun Liu, Min Zhang, Yijiang Jin, Shaoping Ma, THUIR at TREC 2006 Terabyte Track, Notebook proceedings of the The Fifteenth Text REtrieval Conference (TREC 2006). pp. 673-676. PDF
Yupeng Fu, Rongjing Xiang, Min Zhang, Yiqun Liu, Shaoping Ma, A PDD-based Searching Approach for Expert Finding in Intranet Information Management. Asia Information Retrieval Symposium, AIRS 2006, in Lecture Notes in Computer Science Vol.4182. 2006.
Yupeng Fu, Wei Yu, Yize Li, Yiqun Liu, Min Zhang, Shaoping Ma. THUIR at TREC 2005: Enterprise Track. NIST Special Publication: SP 500-266, Proceedings of the Fourteenth Text Retrieval Conference.
Min Zhang, Chuan Lin, Yiqun Liu, Leo Zhao, Shaoping Ma: THUIR at TREC 2003: Novelty, Robust and Web. TREC 2003: 556-567.
Books
Yiqun Liu, Shaoping Ma, Tao Hong, Zizheng Liu. Fundamentals of Search Engine Technology. Tsinghua University Press, 2010.07. Amazon
Recent Slides
User Behavior Analysis for Commercial Search Engines (2012) PDF
Yiqun Liu, Min Zhang, Yijiang Jin, Shaoping Ma. An automatic method for search engine performance evaluation. Application No. 200610144289.X, Authorized No. CN100440224C.
Yiqun Liu, Min Zhang, Shaoping Ma. A method for locating news pages on the Web. Application No. 200810117516.9. Authorized No. CN101329687.
Yiqun Liu, Shaoping Ma, Min Zhang, Yijiang Jin, Kuo Zhang, Liyun Ru. A method and corresponding equipments for synonym extraction. Application No. 200910087076.1. Authorized No. CN101576916
Cenrong Wei, Yiqun Liu, Min Zhang, Shaoping Ma. A method for search result reranking based on user behavior anlaysis. Application No. 200710099594.6, Authorized No. CN101055587.
Cenrong Wei, Yiqun Liu, Min Zhang, Shaoping Ma. An automatic method for locating key resource pages on the Web. Application No. 200710098531.9, Authorized No.CN101105801.
Bo Zhou, Yiqun Liu, Min Zhang, Shaoping Ma. A method of query correction for Chinese search engines. Application No. 200810224323.3. Authorized No. CN101369285.
Junwei Miao, Yiqun Liu, Min Zhang, Yijiang Jin, Shaoping Ma, Kuo Zhang, Liyun Ru. Method and system for internet context advertising. Application No. 200910088943.3.
Qi Fang, Yiqun Liu, Shaoping Ma, Min Zhang, Yijiang Jin, Zijian Tong, Liyun Ru. A method for Web page recommendation based on Web accsess log analysis. Application No. 200910236869.5.
Bo Zhou, Yiqun Liu, Min Zhang, Yijiang Jin, Shaoping Ma, Liyun Ru, Lei Yang. Method and system for Web page description based on browsing behavior. Application No. 201010109570.6.
Bo Zhou, Yiqun Liu, Min Zhang, Yijiang Jin, Shaoping Ma, Liyun Ru, Lei Yang. Method and system for Web page description based on search engine interaction behavior. Application No. 201010109586.7.
Recent Research Issues
Class "Fundamentals Of Search Engine Technology" (THU 40240762) for undergraduate students (cowork with Baidu.com)
Class "Commercial Search Engine Products: Theory, Design and Practice" (THU 80240482) for graduate students (cowork with Google.com)
