Publications

2025

7. A Comparative Study of Specialized LLMs as Dense Retrievers
   Hengran Zhang, Keping Bi, Jiafeng Guo
   CCIR 25

6. Utility-Focused LLM Annotation for Retrieval and Retrieval-Augmented Generation [PDF][Code]
   Hengran Zhang, Minghao Tang, Keping Bi, Jiafeng Guo, Shihao Liu, Daiting Shi, Dawei Yin, Xueqi Cheng
   Pre-print

5. Unleashing the Power of LLMs in Dense Retrieval with Query Likelihood Modeling [PDF][Code]
   Hengran Zhang, Keping Bi, Jiafeng Guo, Xiaojie Sun, Shihao Liu, Daiting Shi, Dawei Yin, Xueqi Cheng
   Pre-print

2024

4. Iterative Utility Judgment Framework via LLMs Inspired by Relevance in Philosophy [PDF][Code]
   Hengran Zhang,Keping Bi, Jiafeng Guo, Xueqi Cheng
   Pre-print

3. Are Large Language Models Good at Utility Judgments? [PDF][Code]
   Hengran Zhang,Ruqing Zhang, Jiafeng Guo, Maarten de Rijke, Yixing Fan, Xueqi Cheng
   SIGIR 2024

2023

2. From relevance to utility: evidence retrieval with feedback for fact verification [PDF][Code]
   Hengran Zhang,Ruqing Zhang, Jiafeng Guo, Maarten de Rijke, Yixing Fan, Xueqi Cheng
   Findings of EMNLP 2023
   

2022

1. Cort: A new baseline for comparative opinion classification by dual prompts [PDF][Code]
   Yequan Wang, Hengran Zhang, Aixin Sun, Xuying Meng.
   Findings of EMNLP2022