毛佳昕
中国人民大学高瓴人工智能学院任预聘助理教授、预聘副教授
简介：中国人民大学高瓴人工智能学院任预聘助理教授、预聘副教授。于2013年和2018年获得清华大学学士和博士学位。博士毕业后曾在清华大学担任博士后研究员，其主要研究方向为信息检索、网络搜索、搜索用户行为分析和机器学习。曾在SIGIR、TOIS、WWW、WSDM、CIKM、IJCAI、ECIR等信息检索领域顶级会议和期刊发表论文90余篇，曾获得SIGIR 2024最佳论文奖、SIGIR 2024最佳短文提名、WSDM 2022最佳论文奖、SIGIR 2020最佳论文提名奖、计算机学报五年最佳论文奖（2014 2018）、ICTIR 2019最佳短文提名奖和SIGIR 2018最佳短文提名奖，入选2025北京市科技新星。 毛佳昕现担任中国中文信息学会青年工作委员会执委、信息检索专委会委员等职务。他还曾担任SIGIR AP 2024程序委员会主席(PC chairs)，以及SIGIR、WWW、WSDM、AAAI、CIKM等会议的程序委员会委员，以及TOIS、TKDE、JASIST等杂志的审稿人。
研究成果：
（1）论文
[1] Yan Fang*, Jingtao Zhan*, Qingyao Ai, Jiaxin Mao, Weihang Su, Jia Chen, Yiqun Liu. Scaling Laws For Dense Retrieval. The 47th International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR 2024).
[2] Yiding Sun, Feng Wang, Yutao Zhu, Wayne Xin Zhao, Jiaxin Mao. An Integrated Data Processing Framework for Pretraining Foundation Models. The 47th International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR 2024). Preprint
[3] Peiyuan Gong, Jiamian Li, Jiaxin Mao. CoSearchAgent: A Lightweight Collaborative Search Agent with Large Language Models. The 47th International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR 2024). Preprint
[4] Erhan Zhang, Xingzhu Wang, Peiyuan Gong, Yankai Lin, Jiaxin Mao. USimAgent: Large Language Models for Simulating Search Users. The 47th International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR 2024). Preprint
[5] Qi Liu*, Gang Guo*, Jiaxin Mao, Zhicheng Dou, Ji Rong Wen, Hao Jiang, Xinyu Zhang, Zhao Cao. An Analysis on Matching Mechanisms and Token Pruning for Late interaction Models. ACM Transactions on Information Systems. (TOIS).
[6] Lang Mei, Jiaxin Mao, Juan Hu, Naiqiang Tan, Hua Chai, Ji Rong Wen. Improving first stage retrieval of point of interest search by pre training models. ACM Transactions on Information Systems. (TOIS).
[7] Yunqiu Shao, Haitao Li, Yueyue Wu, Yiqun Liu, Qinyao Ai, Jiaxin Mao, Yixiao Ma, Shaoping Ma. An Intent Taxonomy of Legal Case Retrieval. ACM Transactions on Information Systems. (TOIS).
[8] Zechun Niu, Jiaxin Mao, Qingyao Ai, Lixin Zou, Shuaiqiang Wang, Dawei Yin. Overview of the NTCIR 17 Unbiased Learning to Rank Evaluation 2 (ULTRE 2) Task. Proceedings of the NTCIR 17 Conference (NTCIR 17)
[9] Qi Liu, Jiaxin Mao. Understanding the Multi vector Dense Retrieval Models. The 32nd ACM International Conference on Information and Knowledge. (CIKM 2023).
[10] Shengjie Ma, Chong Chen, Jiaxin Mao, Qi Tian, and Xuhui Jiang. Session Search with Pre trained Graph Classification Model. The 46th International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR 2023).
[11] Haitao Li, Qingyao Ai, Jingtao Zhan, Jiaxin Mao, Yiqun Liu, Zheng Liu, and Zhao Cao. Constructing Tree based Index for Efficient and Effective Dense Retrieval. The 46th International ACM SIGIR Conference on Research and Development in Information Retrieval. (SIGIR 2023).
[12] Zhijing Wu, Jiaxin Mao, Kedi Xu, Dandan Song, and Heyan Huang. A Passage Level Reading Behavior Model for Mobile Search. The Web Conference 2023. (the WebConf 2023).
[13] Junqi Zhang, Yiqun Liu, Jiaxin Mao, Weizhi Ma, Jiazheng Xu, Shaoping Ma, and Qi Tian. User Behavior Simulation for Search Result Re ranking. ACM Transactions on Information Systems. (TOIS).
[14] Yunqiu Shao, Yueyue Wu, Yiqun Liu, Jiaxin Mao, and Shaoping Ma. Understanding Relevance Judgments in Legal Case Retrieval. ACM Transactions on Information Systems. (TOIS).
（2）项目
[1] 北京市科技新星项目，大模型赋能智能信息检索，在研
[2] 华为合作项目，面向推荐场景的大语言模型智能体研究， 在研
[3] 快手合作项目，视频搜索中的用户个性化查询改写研究 ，在研
[4] CCF 滴滴盖亚项目，地理语义理解增强的跨语言地理文本大模型，在研
[5] CCF 腾讯犀牛鸟项目，基于大模型智能体技术的金融理财助手研究，在研
[6] 2022腾讯微信犀牛鸟专项研究计划，融合知识图谱的深度文本匹配模型，结题
[7] CCF 滴滴盖亚青年学者科研基金项目，基于多任务多目标的深度神经网络地图搜索排序模型，结题
[8] 美团合作项目，面向服务搜索与推荐的算法治理研究，结题
[9] 自然科学基金委青年基金，基于用户行为的搜索结果全页面优化研究项目，批准号：61902209，结题
[10] 华为合作项目，基于世界知识与用户知识建模的深度搜索系统研究，结题