About

I am a PhD student in the Department of Computer Science and Engineering at the University at Buffalo, where I am fortunate to be advised by Prof. Kaiyi Ji. My current research interests include multi-task learning and foundation models. I received my BS in Information Engineering and MS in Information and Communication Engineering from Southeast University in 2018 and 2021, respectively. Before starting my PhD, I had a wonderful experience at Zuoyi Tech. Feel free to reach out if you'd like to chat or explore potential collaborations.

Publications

Rethinking Parameter Sharing for LLM Fine-Tuning with Multiple LoRAs
Hao Ban, Kaiyi Ji. (Preprint 2025)
SAMO: A Lightweight Sharpness-Aware Approach for Multi-Task Optimization with Joint Global-Local Perturbation
Hao Ban, Gokul Ram Subramani, Kaiyi Ji. (ICCV 2025)
Tuning-Free Bilevel Optimization: New Algorithms and Convergence Analysis
Yifan Yang, Hao Ban, Minhui Huang, Shiqian Ma, Kaiyi Ji. (ICLR 2025)
Theoretical Study of Conflict-Avoidant Multi-Objective Reinforcement Learning
Yudan Wang, Peiyao Xiao, Hao Ban, Kaiyi Ji, Shaofeng Zou. (IEEE Transactions on Information Theory 2025)
Fair Resource Allocation in Multi-Task Learning
Hao Ban, Kaiyi Ji. (ICML 2024)
Direction-Oriented Multi-Objective Learning: Simple and Provable Stochastic Algorithms
Peiyao Xiao, Hao Ban, Kaiyi Ji. (NeurIPS 2023)

Services

  • Reviewer — NeurIPS
  • Reviewer — ICML
  • Reviewer — ICLR
  • Reviewer — AAAI

Teaching

  • TA — CSE 531: Algorithm Analysis and Design
  • TA — CSE 535: Information Retrieval
  • TA — CSE 574: Introduction to Computer Vision and Image Processing