Publications

My research focuses on advancing the capabilities and security of Large Language Models (LLMs), with particular emphasis on code understanding, robustness against adversarial attacks, system integration, and educational applications. Current research directions include LLM-based code generation, attack/defense mechanisms for LLMs, development of reliable LLM-powered systems, and AI-enhanced educational technology.

  • Efficiency Robustness of Dynamic Deep Learning Systems

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

    USENIX Security '25

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

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

    Amazon Nova AI Challenge Proceedings

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

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

    arXiv preprint

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

    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

    arXivPDF
  • 2025

  • Towards a robust and generalizable embodied agent

    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

    AmazonPDF
  • Towards a robust and generalizable embodied agent

    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

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

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

    Languages

    LanguagesPDF
  • 2023

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

    Jingwen He, Bihui Jin, Zexin Xu, Danhui Zhang

    Journal of Online Learning Research

    JOLRPDF
  • 2022

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