Hello! I am a PhD student at School of Computing, National University of Singapore (NUS), advised by Prof Wynne Hsu and Prof Mong Li Lee. I am passionate about developing robust models that generalize and adapt to out-of-distribution data, and leveraging AI to solve healthcare challenges with real-world clinical data.

Before starting my PhD, I received my Bachelor’s degree in Computer Science from NUS in 2021. My thesis was supervised by Prof Zhiyong Huang.

I welcome inquiries regarding research and potential collaborations. You can reach me via email.

Publications

(* indicates equal contribution)

Test-Time Adaptation by Causal Trimming

Yingnan Liu, Rui Qiao, Mong Li Lee, Wynne Hsu

In Neural Information Processing Systems (NeurIPS), 2025

[paper][code][poster][video]

Cross-Domain Feature Augmentation for Domain Generalization

Yingnan Liu, Yingtian Zou, Rui Qiao, Fusheng Liu, Mong Li Lee, Wynne Hsu

In International Joint Conference on Artificial Intelligence (IJCAI), 2024

[paper][code][poster][slides]

Identifying who are unlikely to benefit from total knee arthroplasty using machine learning models

Xiaodi Liu*, Yingnan Liu*, Mong Li Lee, Wynne Hsu, Ming Han Lincoln Liow

In npj Digital Medicine, 2024

[paper][code][poster][reply to matter arising]

Towards Robust Out-of-Distribution Generalization Bounds via Sharpness

Yingtian Zou, Kenji Kawaguchi, Yingnan Liu, Jiashuo Liu, Mong Li Lee, Wynne Hsu

In International Conference on Learning Representation (ICLR), 2024 (Spotlight Top 5%)

[paper][poster]

Academic Service

Reviewer for

  • ICLR 2025, 2026
  • Workshop on Test-Time Updates at ICML 2025, ICLR 2026

Teaching

Teaching assistant for

  • CS2309 Research Methodology, Fall 2024
  • CS3244 Machine Learning, Fall 2020
  • CS2105 Introduction to Computer Networks, Spring 2020 and Spring 2021