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Working Paper

Equity-Enforced Path Recommendation in Congested Transit Systems During Disruptions

 · Baichuan Mo, Zhengzhong Ricky You, Ruimin Li

PrecPack: An Efficient Open-Source Exact Solver for Bin Packing with Generalized Precedence Constraints

An open-source exact solver for bin packing with generalized precedence constraints, combining branch-bound-and-remember search with valid column-generation bounds and independently checked solutions.

 · Sunkanghong Wang, Zhengzhong Ricky You, Roberto Baldacci, Baichuan Mo, Hu Qin, Lijun Wei, Zhou Xu

KKT Atlas: Learning Low-Dimensional Local Scenario Models for Contextual Stochastic Optimization

 · Zhengzhong Ricky You, Baichuan Mo, Jinhua Zhao, Zuo-Jun Max Shen

Debiasing Optimal Values in Stochastic Programming by Averaging Solutions

 · Henry Lam, Huajie Qian, Kaizhao Sun, Zhengzhong Ricky You

Driver Surge Maps for Supply Rebalancing with Downstream Matching

 · Yida Xu†, Baichuan Mo†, Zhengzhong Ricky You†, Yuan Zhou, Hao Yi Ong, Zuo-Jun Max Shen

A Dual-Guided Column-Generation-Based Matheuristic for Integrated Railroad Blocking

A dual-guided column-generation-based matheuristic for integrated railroad blocking, coordinating block design, blocking sequences, and block routing.

 · Yida Xu†, Zhengzhong Ricky You†, Baichuan Mo

Log-Driven Semantic Tuning for Mixed Integer Programming Solvers

Log-driven semantic tuning uses large language models to inspect solver diagnostics and propose validated parameter edits for mixed-integer programming solvers.

 · Zhengzhong Ricky You, Kaizhao Sun, Zeping Min, Wotao Yin, Xinshang Wang