Publications

My research focuses on reinforcement learning for robotics and the capabilities and security of Large Language Models (LLMs). My current research directions include reinforcement learning algorithms for robotic manipulation, responsible AI, LLM post-training, development of reliable LLM-powered applications, and AI-enhanced educational technology.

  • Leveraging Generative AI in Designing and Delivering Individualized Responsive Feedback for Pre-service Teachers in Higher Education Springer

    Jingwen He, Tingting Li, Zexin Xu, Kui Xie

    Artificial Intelligence and Human Agency in Education: Volume Two: AI for Equity, Well-Being, and Innovation in Teaching and Learning

  • Efficiency Robustness of Dynamic Deep Learning Systems USENIX Security

    Ravishka Rathnasuriya, Zexin Xu, Tingxi Li, Zihe Song, Mirazul Haque, Simin Chen, Wei Yang

    USENIX Security '25

  • COMET: Closed-loop orchestration for malicious elicitation techniques in code models Amazon

    Zexin Xu, Tingxi Li, Ravishka Shemal Rathnasuriya, Zihe Song, Jun Ren, Bhavesh Mandalapu, Soroush Setayeshpour, Xinya Du, Wei Yang

    Amazon Nova AI Challenge Proceedings

  • LLM4SR: A Survey on Large Language Models for Scientific Research arXiv

    Ziming Luo, Zonglin Yang, Zexin Xu, Wei Yang, Xinya Du

    arXiv preprint

  • Beyond Pass or Fail: Multi-Dimensional Benchmarking of Foundation Models for Goal-based Mobile UI Navigation arXiv

    Dezhi Ran, Mengzhou Wu, Hao Yu, Yuetong Li, Jun Ren, Yuan Cao, Xia Zeng, Haochuan Lu, Zexin Xu, Mengqian Xu, Ting Su, Liangchao Yao, Ting Xiong, Wei Yang, Yuetang Deng, Assaf Marron, David Harel, Tao Xie

    arXiv preprint

  • 2025

  • Towards a robust and generalizable embodied agent Amazon

    Chan Hee Song, Jiaman Wu, Ju-Seung Byun, Zexin Xu, Vardaan Pahuja, Goonmeet Bajaj, Samuel Stevens, Ziru Chen, Yu Su

    Alexa Prize SimBot Challenge Proceedings

  • Towards a robust and generalizable embodied agent CVPR

    Chan Hee Song, Jiaman Wu, Ju-Seung Byun, Zexin Xu, Vardaan Pahuja, Goonmeet Bajaj, Samuel Stevens, Ziru Chen, Yu Su

    Embodied AI Workshop at CVPR

  • Exploring the Role of Artificial Intelligence in Facilitating Assessment of Writing Performance in Second Language Learning Languages

    Zilu Jiang, Zexin Xu, Zilong Pan, Jingwen He, Kui Xie

    Languages

  • 2023

  • Measuring Elementary Students’ Behavioral Engagement in Web-based Science Inquiry Learning JOLR

    Jingwen He, Bihui Jin, Zexin Xu, Danhui Zhang

    Journal of Online Learning Research

  • 2022

    Feel free to email me about anything. I am happy to chat and discuss potential collaborations!