讲座题目：Integrated optimization of charging facility deployment and vehicle management for electric car-sharing systems
摘要：Electric car-sharing systems are expected to be a promising alternative for sustainable urban mobility. This study investigates an integrated optimization problem which determines the long-term facility deployment plan at the strategic level (e.g., the sizing and the configurations of charging stations), while the vehicle assignments, charging and relocation decisions in the short term are also optimized at the operational level. A two-stage stochastic integer program is formulated to capture the demand uncertainty, and a multi-layer time-space-battery network flow model is constructed for tracking battery states and determining the optimal operational decisions. We propose a two-phase benders decomposition algorithm for solving the integrated problem. Numerical results show that our solution approach can significantly improve the efficiency of benders decomposition. Extensive experiments indicate that deployment of both fast charging and normal charging infrastructure can improve system performance such as system profit, level of service, and facility utilization.
简介：Dr. Yang Liu is jointly appointed as an Assistant professor in the Department of Civil and Environmental Engineering and the Department of Industrial Systems Engineering and Management at National University of Singapore. She received her B.S. from Tsinghua University, MPhil from Hong Kong University of Science and Technology and Ph.D. from Northwestern University. Previously, Dr. Liu worked as a consultant at Cambridge Systematics and provided modeling expertise to public agencies such as Chicago Department of Transportation. Dr. Liu"s research covers various topics in the areas of travel demand and congestion management, ridesharing and carsharing systems operations and design, resilient supply chains, urban logistics, and information provision in risky networks. Her work has been published in the major journals in transportation area, including Transportation Research Part A: Policy, Transportation Research Part B: Methodological, and Transportation Research Part C: Emerging Technologies. Currently, she serves as a member on the editorial advisory board of Transportation Research Part C. She is a member of IEEE ITS Education Committee, a member of Transpiration Research Board Committee on Emerging and Innovative Public Transport and Technologies (AP020), and a member of International Scientific Committee (ISC) of Eastern Asia Society for Transportation Studies (EASTS).