Qingkai Dong

I am a PhD student in Statistics at the University of Connecticut, advised by HaiYing Wang and Jun Yan. My work centers on massive-data subsampling, model averaging, and survival analysis, with a steady interest in building practical statistical software. I expect to graduate in 2027 and am currently on the job market!

Research Interests

Subsampling methods for scalable statistical modeling

I study subsampling methods that preserve statistical efficiency while reducing computational cost. I develop and implement these methods for generalized linear models and survival models, including settings with rare binary outcomes or features.

Survival analysis and model averaging

My background includes accelerated failure time models, additive hazards models, and frequentist model averaging methods for censored outcomes.

Clinical trial design with time-to-event outcomes

I study clinical trial designs with time-to-event outcomes and develop and implement novel statistical methods for these designs.

My Research Projects

Statistical Methodology

Rare-feature-adaptive subsampling for big data regression

Aug 2023 - Present • University of Connecticut

I am developing a first-authored methodology paper for regression settings with rare binary covariates, including theory clarifying why estimation becomes unstable and a balanced subsampling framework that improves rare-feature representation.

Global Biometrics Internship

Reconstructing synthetic patient-level data from published survival evidence

Global Biometrics Intern • Jun 2026 - Aug 2026 • Servier Pharmaceuticals

I developed a modular workflow to reconstruct synthetic individual participant data from published Kaplan–Meier curves and summary statistics. The workflow closely reproduced reported survival metrics, recovered additional quantities in simulation studies, and was applied to internal data.

Software

R package subsampling

University of Connecticut

I implemented scalable subsampling methods in R for generalized linear models, rare-feature settings, softmax regression, rare event logistic regression, and quantile regression, with documentation and reproducible examples.

Academia-Industry Collaboration

Adaptive clinical trial design

Research Assistant • Mar 2024 - Dec 2025 • Servier Pharmaceuticals and University of Connecticut

I coauthored work on predictive-modeling-assisted interim analysis for censored time-to-event trials, including covariate-informed prediction for censored participants and evaluation metrics for conditional power accuracy and futility decisions; the manuscript is under revision.

Applied Collaboration

Social determinants of health, frailty, and accelerated aging in breast cancer survivors

Research Assistant • Jul 2024 - Aug 2024 • Departments of Statistics and Human Development and Family Sciences, University of Connecticut

I helped frame and prepare a study of how social determinants of health relate to frailty and accelerated aging among breast cancer survivors. My work focused on retrieving, cleaning, and integrating All of Us EHR, survey, and physical-measurement data for subsequent statistical analysis.

Applied Collaboration

Sensor-response analysis for nitroaromatic compounds

Research Project • Mar 2024 - May 2024 • Departments of Statistics and Chemistry, University of Connecticut

I analyzed fluorescence response data from porphyrinoid sensors using clustering and statistical summaries to support compound differentiation and sensor selection.

Cross-Disciplinary Collaboration

Time series explainability and large language model–enabled semantic interpretation

Collaboration • 2025 - Present

I am contributing to a survey project on time series explainability with an emphasis on LLM-enabled semantic explanations, including benchmark curation and related research synthesis; the manuscript is currently under review.

Selected Papers

Published and ongoing research.

Rare-feature-adaptive subsampling for big data regression

Qingkai Dong, Jun Yan, Qiang Zhang, HaiYing Wang • Under review

Random Subsampling: Inferential Targets, Estimators, and Sampling Procedures

Dingyi Wang†, Qingkai Dong†, Qiang Zhang, Qingpei Hu, HaiYing Wang • Under review

† Equal contribution.

Predictive-Modeling–Assisted Interim Decision-Making in Adaptive Trials with Censored Survival Outcomes

Qingkai Dong†, Albert Man†, Zhaowei (Zoe) Hua, Zhaoyang Teng, HaiYing Wang, Jun Yan • Manuscript under revision

† Equal contribution.

Weighted Least Squares Model Averaging for Accelerated Failure Time Models

Dong Q., Liu B., Zhao H. • Computational Statistics and Data Analysis, 2023

The Jackknife Model Averaging of Accelerated Failure Time Model with Current Status Data

Zhao H., Liu B., Dong Q., Zhang X. • Acta Mathematicae Applicatae Sinica, 2023

In Chinese.

A Variable Selection Method for the Additive Hazards Model with Current Status Data

Zhao H., Dong Q. • Journal of Systems Science and Mathematical Sciences, 2022

In Chinese.

Education

University of Connecticut

PhD in Statistics • Sep 2023 - Expected 2027 • Storrs, CT

Advisors: HaiYing Wang and Jun Yan.

Zhongnan University of Economics and Law

MS in Mathematical Statistics • Sep 2020 - Jun 2023 • Wuhan, China

Advisor: Hui Zhao.

Thesis: Variable Selection and Model Averaging Methods of Accelerated Failure Time Models.

Qingdao University

BS in Applied Statistics • Sep 2016 - Jun 2020 • Qingdao, China

Thesis: Automatic Grading System Based on Convolutional Neural Networks.

Teaching

Courses

  • Principal Instructor, STAT 3255 Introduction to Data Science, University of Connecticut, Spring 2027.
  • Teaching Assistant, STAT 1100Q Elementary Concepts of Statistics, University of Connecticut, Sep 2026 - Dec 2026.
  • Teaching Assistant, STAT 3445 Introduction to Mathematical Statistics II, University of Connecticut, Sep 2026 - Dec 2026.
  • Principal Instructor, STAT 3675Q Statistical Computing, University of Connecticut, Jan 2026 - May 2026. Independently taught three 50-minute sections serving approximately 20 students; designed slides and R-based homework assignments, coordinated presentations, and graded midterm and final examinations.
  • Teaching Assistant, Probability Theory, Zhongnan University of Economics and Law, Sep 2020 - Jan 2021.

Presentations, Service, and Awards

Presentations

  • New England Rare Disease Statistics Workshop (NERDS), Boston, MA, poster presentation, Oct 2026.
  • SILVER Online Lab Meeting, Department of Epidemiology & Public Health, University of Maryland School of Medicine, invited talk, Oct 2026.
  • Joint Statistical Meetings (JSM), invited talk, 2026.
  • New England Statistics Symposium (NESS), invited talk, 2026.
  • ICSA Applied Statistics Symposium, invited talk, 2026.
  • New England Statistics Symposium (NESS), poster presentation, 2026.
  • The Design and Analysis of Experiments (DAE), poster presentation, 2026.
  • New England Rare Disease Statistics Workshop (NERDS), Boston, MA, poster presentation, Oct 2025.
  • Dahshu Data Science Symposium, Storrs, CT, poster presentation, Oct 2025.

Service

  • Reviewer for Computational Statistics and Data Analysis.
  • Reviewer for Journal of Computational Science.
  • Reviewer for Statistical Papers.
  • Reviewer for Sankhya B.
  • Reviewer for Journal of Systems Science and Mathematical Sciences.

Awards

  • UConn Graduate School Conference Participation Award, Jul 2026.
  • New England Statistics Symposium (NESS) Poster Award, 2026.
  • ICSA Applied Statistics Symposium Student Paper Award, 2026.
  • Predoc Fellowship, University of Connecticut, Jan 2025.
  • First-class Scholarship, Zhongnan University of Economics and Law, 2020 and 2022.

Contact

Programming R, Python, Matlab, C++, LaTeX
Languages English, Chinese