Research

(* co-first author)

Statistical Methodology &Theory:

• • Minimax Regret Learning for Data with Heterogeneous Subgroups.
    W. Mo*, WT*, S. Xue, Y. Liu, and J. Zhu
    arXiv preprint (2024)
    [arXiv]
    
    

  • Population-level Balance in Signed Networks.
    WT and J. Zhu
    Journal of the American Statistical Association: Theory and Methods (JASA) (2024+)
    [Journal][arXiv][Code]
    (An earlier version of this paper received ASA SLDS Section 2021 Student Paper Award.)
    
    

• • Incorporating External Risk Information with the Cox Model under Population Heterogeneity: Applications to Trans-Ancestry Polygenic Hazard Scores.
    D. Wang, W. Ye, J. Zhu, G. Xu, WT, M. Zawistowski, LG. Fristsche, K. He
    arXiv preprint (2023)
    [arXiv]

• • Survival Analysis via Ordinary Differential Equations.
    WT, K. He, G. Xu, and J. Zhu
    Journal of the American Statistical Association: Theory and Methods (JASA) (2023), 118(544), 2406-2421.
    [Journal][arXiv][Code]
    (An earlier version of this paper received ASA Nonparametric Statistics Section 2020 Student Paper Award and ENAR 2021 Distinguished Student Paper Award.)
    
    

  • SODEN: A Scalable Continuous-time Survival Model through Ordinary Differential Equation Networks.
    WT*, J. Ma*, Q. Mei, and J. Zhu 
    Journal of Machine Learning Research (JMLR) (2022), 23(34):1-29.
    [Journal] [arXiv] [Code]
    
    

  • Learning-to-rank with Partitioned Preference: Fast Estimation for the Plackett-Luce Model.
    J. Ma, X. Yi, WT, Z. Zhao, L. Hong, E.H. Chi, and Q. Mei 
    The 24th International Conference on Artificial Intelligence and Statistics (2021). (AISTATS'21).
    [arXiv]
    
    

  • Semi-supervised Joint Learning for Longitudinal Clinical Events Classification Using Neural Network Models.
    WT, J. Ma, A.K. Waljee, and J. Zhu
    Stat (2020), e305. (Special issue on deep learning)
    [Journal]
    
    

  • A Flexible Generative Framework for Graph-based Semi-supervised Learning.
    J. Ma*, WT*, J. Zhu, and Q. Mei
    The Annual Conference on Neural Information Processing Systems 32 (2019). (NeurIPS'19).
    [Proceedings] [Code]

Applications to Health Sciences:

• • Greater Geographic Sharing and Heart Transplantation Waitlist Outcomes Following the 2018 Heart Allocation Policy
    J. Golbus, J. Li, T. Cascino, WT, J. Zhu, M. Colvin, M. Walsh, and B. Nallamothu
    Journal of Heart and Lung Transplantation (2023), 42(7), 936-942.
    [Journal] 
    
    

  • Digestive Manifestations in Patients Hospitalized with COVID-19.
    B.J. Elmunzer and DMC19 Collaborators (on behalf of the North American Alliance for the Study of Digestive Manifestation of COVID-19) [including WT]
    Clinical Gastroenterology and Hepatology (2020), 19(7), 1355-1365.
    [Journal]
    
    

  • Assessment of a Deep Learning Model to Predict Hepatocellular Carcinoma in Patients with Hepatitis C Cirrhosis.
    G.N. Ioannou*, WT*, L.A. Beste, M.A. Konerman, G.L. Su, T. Van, E.B. Tapper, A.G. Singal, J. Zhu, and A.K. Waljee
    JAMA Network Open (2020), 3(9):e2015626.
    [Journal]