🧑‍🎓 Biography

I am a final-year Ph.D. candidate at Shanghai Jiao Tong University, supervised by Prof. Hai Zhao, majoring in Computer Science. Before that, I received my B.S. degree in Computer Science from Central South University in 2021.

My research focuses on improving the Efficiency of large language models, including but not limited to model pruning, efficient training, and KV cache optimization.

📝 Publications

• LESA: Learnable LLM Layer Scaling-Up
  Yifei Yang, Zouying Cao, Xinbei Ma, Yao Yao, Libo Qin, Zhi Chen, Hai Zhao
  ACL 2025

• LaCo: Large language model pruning via layer collapse
  Yifei Yang, Zouying Cao, Hai Zhao
  EMNLP 2025, Findings

• BatGPT-Chem: A Foundation Large Model For Chemical Engineering
  Yifei Yang, Runhan Shi, Zuchao Li, Shu Jiang, Bao-Liang Lu, Qibin Zhao, Yang Yang, Hai Zhao
  Research, SCI (Q1 Top Journal)

• Nothing in excess: Mitigating the exaggerated safety for llms via safety-conscious activation steering
  Zouying Cao, Yifei Yang, Hai Zhao
  AAAI 2025

• FreDF: Learning to Forecast in Frequency Domain
  Hao Wang, Licheng Pan, Zhichao Chen, Degui Yang, Sen Zhang, Yifei Yang, Xinggao Liu, Haoxuan Li, Dacheng Tao
  ICLR 2025

• KVSharer: Efficient Inference via Layer-Wise Dissimilar KV Cache Sharing
  Yifei Yang, Zouying Cao, Qiguang Chen, Libo Qin, Dongjie Yang, Zhi Chen, Hai Zhao
  Preprint

• How Deep is Love in LLMs’ Hearts? Exploring Semantic Size in Human-like Cognition
  Yao Yao, Yifei Yang, Xinbei Ma, Dongjie Yang, Zhuosheng Zhang, Zuchao Li, Hai Zhao
  Preprint

• Head-wise Shareable Attention for Large Language Models
  Zouying Cao, Yifei Yang, Hai Zhao
  EMNLP 2024, Findings

• Hypertext Entity Extraction in Webpage
  Yifei Yang, Tianqiao Liu, Bo Shao, Hai Zhao, Linjun Shou, Ming Gong, Daxin Jiang
  Preprint

• Autohall: Automated hallucination dataset generation for large language models
  Zouying Cao, Yifei Yang, Hai Zhao
  Preprint

• CMMLU: Measuring Massive Multitask Language Understanding in Chinese
  Haonan Li, Yixuan Zhang, Fajri Koto, Yifei Yang, Hai Zhao, Yeyun Gong, Nan Duan, Timothy Baldwin
  ACL 2024, Findings

• Attack Named Entity Recognition by Entity Boundary Interference
  Yifei Yang, Hongqiu Wu, Hai Zhao
  COLING 2024

• RefGPT: Dialogue Generation of GPT, by GPT, and for GPT
  Dongjie Yang, Ruifeng Yuan, Yuantao Fan, Yifei Yang, Zili Wang, Shusen Wang, Hai Zhao
  EMNLP 2023, Findings

• BATGPT: A Bidirectional Autoregressive Talker from Generative Pre-trained Transformer
  Zuchao Li, Shitou Zhang, Hai Zhao, Yifei Yang, Dongjie Yang
  Preprint

• Aspect-based sentiment analysis as machine reading comprehension
  Yifei Yang, Hai Zhao
  COLING 2022

• Nested Named Entity Recognition as Corpus Aware Holistic Structure Parsing
  Yifei Yang, Zuchao Li, Hai Zhao
  COLING 2022

📖 Education

• Sep. 2021 – Jun. 2026 (expected), Ph.D. in Computer Science, Shanghai Jiao Tong University (SJTU)
• Sep. 2017 – Jun. 2021, B.S. in Computer Science, Central South University (CSU)

💻 Internships

• Shanghai Artificial Intelligence Laboratory, Research Intern in Large-scale Models
  Feb. 2024 – Jun. 2024 Mentored by Dr. Zhi Chen, Dr. Hang Yan

• Microsoft STCA, Research Intern in Webpage Entity Extraction
  Aug. 2022 – Mar. 2023 Mentored by Principal Applied Scientist Manager Linjun Shou

🛠️ Service

• Reviewer for ACL, EMNLP, ICLR, AAAI, NeurIPS, TASLP, TMC

🎯 Miscellaneous

I have a passion for various sports, including road cycling 🚴, fitness training 💪, and basketball 🏀 :)