Haoyun Deng 邓皓云

Ph.D. Student in Operations Research at Georgia Tech

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Haoyun Deng outdoors in autumn

I am a fifth year Ph.D. student in Operations Research at the H. Milton Stewart School of Industrial and Systems Engineering at Georgia Tech, advised by Dr. Nick Sahinidis and Dr. Weijun Xie.

Before joining Georgia Tech, I received a B.S. with honors in Mathematics and Applied Mathematics and completed a second major in Computer Science and Technology at Shanghai University of Finance and Economics.

Research Interests

Optimization for complex systems under uncertainty and nonconvexity

I am broadly interested in optimization and decision-making under uncertainty. My research develops scalable computational methods and mathematical models for challenging problems involving uncertainty, discrete decisions, and nonconvexity. My work spans stochastic programming, integer programming, nonconvex optimization, and bilevel optimization. I am particularly motivated by applications in transportation systems, with a current focus on air mobility planning.

Three-dimensional illustrative stochastic integer recourse value function Q(x) over x1 and x2, shown as horizontal terraces with jump discontinuities.
Conceptual urban air mobility network: passenger eVTOL aircraft connect three rooftop vertiports along purple flight routes over a gray city.

Research Papers

On the ReLU Lagrangian Cuts for Stochastic Mixed Integer Programming

Haoyun Deng and Weijun Xie

Under minor revision at Operations Research.

View preprint

On a fair and risk-averse urban air mobility resource allocation problem under demand and capacity uncertainties

Luying Sun, Haoyun Deng, Peng Wei, and Weijun Xie

Naval Research Logistics, 72, 111–132, 2025.

View article

Honors and Awards

  • Fan Favorite Award, YinzOR Student Conference Flash Talk Competition
  • H. Milton Stewart Ph.D. Student Teaching Fellow
  • Second Place, YinzOR Student Conference Poster Competition

Presentations and Posters

On the ReLU Lagrangian Cuts for Stochastic Mixed Integer Programming

  • YinzOR Student Conference, poster, Carnegie Mellon University
  • Mixed Integer Programming Workshop, poster, Minneapolis, MN
  • IISE Annual Conference & Expo, Atlanta, GA
  • Stochastic Programming Society Virtual Seminar Series
  • ISyE Student Seminar, Georgia Tech
  • INFORMS Annual Meeting, Seattle, WA

Bilevel Risk-Averse Routing and Resource Allocation for Urban Air Mobility

  • International Conference on Bilevel Optimization, Pittsburgh, PA
  • Mixed Integer Programming Workshop, poster, Stamford, CT
  • INFORMS Optimization Society Conference, Atlanta, GA
  • INFORMS Annual Meeting, Atlanta, GA

Homogeneous Quadratically Constrained Quadratic Programming: Stronger Approximation Bounds and Exact Methods

  • UpcomingINFORMS Annual Meeting, San Francisco, CA
  • YinzOR Student Conference, flash talk, Carnegie Mellon University

Teaching

  • Instructor, ISyE 3770: Statistics and Applications, Summer 2025
  • Teaching Assistant, ISyE 3133: Engineering Optimization, Summer 2023

Services

Department Service

  • ISyE Bee Well Ambassador, Spring 2025–present

Session Chair

  • INFORMS Optimization Society Conference, March 2026
  • INFORMS Annual Meeting, October 2025

Journal Reviewer

  • Operations Research
  • Naval Research Logistics