I am a second-year Ph.D. candidate at Intelligent Information Retrieval Lab (IIR Lab) from the Gaoling School of Artificial Intelligence (GSAI), Renmin University of China (RUC), supervised by Prof. Jun Xu. I obtained my bachelor’s degree from Harbin Institute of Technology, Shenzhen (HITSZ) in June 2023. My research interests include Information Retrieval, Recommender System, and GUI Agent.

🔥 News

2025.05: 🎉🎉 My first-author paper ‘‘Length-Induced Embedding Collapse in PLM-based Models’’ is accepted by (ACL 2025)!
2025.04: 🎉🎉 My first-author paper ‘‘Exploring the Escalation of Source Bias in User, Data, and Recommender System Feedback Loop’’ is accepted by (SIGIR 2025)!
2025.04: 🎉🎉 Our paper ‘‘Mitigating Source Bias with LLM Alignment’’ is accepted by (SIGIR 2025)!
2024.05: 🎉🎉 Our paper ‘‘Cocktail: A comprehensive information retrieval benchmark with llm-generated documents integration’’ is accepted by (ACL 2024 Findings)!
2024.05: 🎉🎉 Our paper ‘‘Neural retrievers are biased towards llm-generated content’’ is accepted by (KDD 2024)!
2023.08: 🎉🎉 Our paper ‘‘Dually enhanced delayed feedback modeling for streaming conversion rate prediction’’ is accepted by (CIKM 2023)!

📝 Publications

Length-Induced Embedding Collapse in PLM-based Models

Yuqi Zhou, Sunhao Dai, Zhanshuo Cao, Xiao Zhang, Jun Xu

ACL 2025 | Paper
Exploring the Escalation of Source Bias in User, Data, and Recommender System Feedback Loop

Yuqi Zhou, Sunhao Dai, Liang Pang, Gang Wang, Zhenhua Dong, Jun Xu, Ji-Rong Wen

SIGIR 2025 | Paper
Mitigating Source Bias with LLM Alignment

Sunhao Dai, Yuqi Zhou, Liang Pang, Zhuoyang Li, Zhaocheng Du, Gang Wang, Jun Xu

SIGIR 2025 | Paper
Cocktail: A comprehensive information retrieval benchmark with llm-generated documents integration

Sunhao Dai, Weihao Liu, Yuqi Zhou, Liang Pang, Rongju Ruan, Gang Wang, Zhenhua Dong, Jun Xu, Ji-Rong Wen

ACL 2024 Findings | Paper
Neural retrievers are biased towards llm-generated content

Sunhao Dai, Yuqi Zhou, Liang Pang, Weihao Liu, Xiaolin Hu, Yong Liu, Xiao Zhang, Gang Wang, Jun Xu

KDD 2024 | Paper
Dually enhanced delayed feedback modeling for streaming conversion rate prediction

Sunhao Dai, Yuqi Zhou, Jun Xu, Ji-Rong Wen

CIKM 2023 | Paper

🎖 Honors and Awards

2022.06 Third Prize in Language and Intelligence Technology Competition: Knowledge-based Dialogue
2021.10 Second Prize in CCIR Cup National Information Retrieval Challenge: Knowledge Measurement of Pre-trained Models

📖 Educations

2023.09 - Present, PhD Candidate. Gaoling School of Artificial Intelligence, Renmin University of China.
2019.09 - 2023.06, Bachelor in Computer Science and Technology. School of Computer Science and Technology, Harbin Institute of Technology, Shenzhen.

📚 Academic Services

Program Committee / Reviewer: KDD 2024, KDD 2025, ACL ARR 2025 February, ACL ARR 2025 May, NeurIPS 2025
Secondary Reviewer: NeurIPS 2024, WWW 2025, ICLR 2025, SIGIR 2025

💻 Internships