Zhenzhen Zhang

Distributionally Robust Chance Constrained $p$-Hub Center Problem

  • Yue Zhao
  • Zhi Chen
  • Zhenzhen Zhang
    • Categories Robust Optimization, Transportation Tags , , , ,

    The $p$-hub center problem is a fundamental model for the strategic design of hub location. It aims at constructing $p$ fully interconnected hubs and links from nodes to hubs so that the longest path between any two nodes is minimized. Existing literature on the $p$-hub center problem under uncertainty often assumes a joint distribution of … Read more

    Vessel Deployment with Limited Information: Distributionally Robust Chance Constrained Models

  • Yue Zhao
  • Zhi Chen
  • Andrew Lim
  • Zhenzhen Zhang
    • Categories Robust Optimization, Transportation Tags , , , , ,

    This paper studies the fundamental vessel deployment problem in the liner shipping industry, which decides the numbers of mixed-type ships and their sailing frequencies on fixed routes to provide sufficient vessel capacity for fulfilling stochastic shipping demands with high probability. In reality, it is usually difficult (if not impossible) to acquire a precise joint distribution … Read more