刘奕群，男，工学博士，清华大学科研院院长、互联网司法研究院院长、教授。

工学学士 (计算机科学与技术), 清华大学, 中国, 2003;

工学博士 (计算机科学与技术), 清华大学, 中国, 2007.

中国人工智能学会理事

中国中文信息处理学会理事

中国计算机学会杰出会员

2024年2月，当选中国人工智能学会会士。

网络信息检索

网络用户行为分析

自然语言处理

主要研究领域集中在信息检索、互联网搜索技术以及自然语言处理研究方面。他是信息检索领域知名期刊Foundations and Trends in IR创刊以来首位来自亚洲国家的主编，也先后受邀担任信息检索领域重要会议ACM SIGIR 2018、ICTIR2020、NTCIR-13/14程序委员会主席等学术职务。先后获得科技部科技创新领军人才、北京市科学技术一等奖、钱伟长中文信息处理青年创新一等奖、北京智源学者、CIKM2018最佳论文奖、SIGIR2017最佳学生论文奖、AIRS2018最佳论文奖等学术奖励。并作为项目负责人获得国家重点研发计划、国家自然科学基金委优秀青年基金、重点基金支持。目前兼任中国人工智能学会理事、知识工程与分布智能系统专委会副主任、中国中文信息学会理事、信息检索与内容安全专委会副主任、ACM senior member、中国计算机学会杰出会员。

亚洲信息检索会议（AIRS）最佳论文提名奖，最佳海报论文奖 (2013);

ACM信息检索会议（SIGIR）最佳论文提名奖(2015);

北京市科学技术一等奖（技术发明类，第一完成人）(2015);

清华大学“刘冰”优秀辅导员奖(2015);

清华大学学术新人奖(2015);

国家自然科学基金优秀青年基金(2016);

ACM信息检索会议（SIGIR）最佳学生论文奖(2017);

ACM CIKM2018会议最佳论文奖（Best Overall Paper）;

亚洲信息检索会议AIRS2018最佳论文奖;

科技部科技创新领军人才（2020）;

第十七届中国青年科技奖（2022）。

2021年4月12日下午，清华大学长聘教授聘任仪式举行。刘奕群被清华大学聘为长聘教授。

“长聘教授”是清华大学教师人事制度改革的关键词之一。

作为第一完成人获得北京市科学技术奖一等奖、钱伟长中文信息处理科学技术奖一等奖。先后获得自然基金委优秀青年基金、国家级科技创新领军人才、国际计算机学会杰出会员，兼任中国人工智能学会副秘书长、中国中文信息处理学会信息检索专委会主任、国际知名期刊《Foundations and Trends in IR》主编等。

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

[2] 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).

[3] Jiaxin Mao, Yiqun Liu, Noriko Kando, Min Zhang, Shaoping Ma. How does Domain Expertise Affect User’s Search Interaction and Outcome in Exploratory Search? Accepted by ACM Transactions on Information Systems (TOIS).

[4] Junqi Zhang, Yiqun Liu, Shaoping Ma, Qi Tian. Relevance Estimation with Multiple Information Sources on Search Engine Result Pages. The 27th ACM International Conference on Information and Knowledge Management (CIKM2018).

[5] Xiangsheng Li, Yiqun Liu, Jiaxin Mao, Zexue He, Min Zhang, Shaoping Ma. Understanding Reading Attention Distribution during Relevance Judgement. The 27th ACM International Conference on Information and Knowledge Management (CIKM2018).

[8] Fuli Feng, Xiangnan He, Yiqun Liu, Liqiang Nie and Tat-Seng Chua. Learning on Partial-Order Hypergraphs. The Web Conference 2018 (WWW2018).

[9] Chong Chen, Min Zhang, Yiqun Liu and Shaoping Ma. Neural Attentional Rating Regression with Review-level Explanations. The Web Conference 2018 (WWW2018).

[10] Ye Chen, Yiqun Liu, Min Zhang and Shaoping Ma. User Satisfaction Prediction with Mouse Movement Information in Heterogeneous Search Environment. IEEE Transactions on Knowledge and Data Engineering. (TKDE).

[11] Yiqun Liu, Yi Chang and Jian-yun Nie. Constructing click models for search users. Information Retrieval Journal (IRJ). DOI: 10.1007/s10791-017-9294-x.

[12] Yuli Liu, Yiqun Liu, Ke Zhou, Min Zhang and Shaoping Ma. Detecting Collusive Spamming Activities in Community Question Answering. The 26th International World Wide Web Conference (WWW2017).

[13] Fan Zhang, Yiqun Liu, Xin Li, Min Zhang, Yinghui Xu and Shaoping Ma. Evaluating Web Search with a Bejeweled Player Model. The 39th ACM SIGIR International Conference on Research and Development in Information Retrieval (SIGIR2017 Best Student Paper Award).

[14] Cheng Luo, Yiqun Liu, Tetsuya Sakai, Fan Zhang, Min Zhang and Shaoping Ma. Evaluating Mobile Search with Height-Biased Gain. The 39th ACM SIGIR International Conference on Research and Development in Information Retrieval (SIGIR2017).

[15] Ye Chen, Ke Zhou, Yiqun Liu, Min Zhang and Shaoping Ma. Meta-evaluation of Online and Offline Web Search Evaluation Metrics. The 39th ACM SIGIR International Conference on Research and Development in Information Retrieval (SIGIR2017).

[16] Xiaohui Xie, Yiqun Liu, Xiaochuan Wang, Meng Wang, Zhijing Wu, Yingying Wu, Min Zhang and Shaoping Ma. Investigating Examination Behavior of Image Search Users. The 39th ACM SIGIR International Conference on Research and Development in Information Retrieval (SIGIR2017).

[17] Jiaxin Mao, Yiqun Liu, Huanbo Luan, Min Zhang and Shaoping Ma. Understanding and Predicting Usefulness Judgment in Web Search. (Short paper). The 39th ACM SIGIR International Conference on Research and Development in Information Retrieval (SIGIR2017).

[18] Cheng Luo, Yukun Zheng, Yiqun Liu, Xiaochuan Wang, Jingfang Xu, Min Zhang and Shaoping Ma. SogouT-16: A New Web Corpus to Embrace IR Research. (Short paper). The 39th ACM SIGIR International Conference on Research and Development in Information Retrieval (SIGIR2017).