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- Seongmoon Kim, Mark E. Lewis, Chelsea C. White
- IEEE Transactions on Intelligent Transportationâ€¦
- 2005

Routing vehicles based on real-time traffic conditions has been shown to significantly reduce travel time, and hence cost, in high-volume traffic situations. However, taking real-time traffic dataâ€¦ (More)

- Seongmoon Kim, Mark E. Lewis, Chelsea C. White
- IEEE Transactions on Intelligent Transportationâ€¦
- 2005

This paper examines the value of real-time traffic information to optimal vehicle routing in a nonstationary stochastic network. We present a systematic approach to aid in the implementation ofâ€¦ (More)

- Mark E. Lewis, Martin L. Puterman
- IEEE Trans. Automat. Contr.
- 2001

This paper focuses on bias optimality in unichain, nite state and action space Markov Decision Processes. Using relative value functions, we present new methods for evaluating optimal bias. Thisâ€¦ (More)

- Douglas G. Down, Ger Koole, Mark E. Lewis
- Queueing Syst.
- 2011

In this paper we discuss the dynamic server control in a two-class service system with abandonments. Two models are considered. In the first case, rewards are received upon service completion andâ€¦ (More)

We consider the optimal control of two parallel servers in a two-stage tandem queuing system with two flexible servers+ New jobs arrive at station 1, after which a series of two operations must beâ€¦ (More)

We consider a nite capacity queueing system in which each arriving customer o ers a reward. A gatekeeper decides based on the reward o ered and the space remaining whether each arriving customerâ€¦ (More)

Simulation-based policy iteration (SBPI) is a modification of the policy iteration algorithm for computing optimal policies for Markov decision processes. At each iteration, rather than solving theâ€¦ (More)

Consider a single commodity inventory system in which the demand is modelled by a sequence of i.i.d. random variables that can take negative values. Such problems have been studied in the literatureâ€¦ (More)

- Seunghwan Yoon, Mark E. Lewis
- Queueing Syst.
- 2004

We consider congestion control in a nonstationary queueing system. Assuming that the arrival and service rates are bounded, periodic functions of time, a Markov decision process (MDP) formulation isâ€¦ (More)

- Hyun-Soo Ahn, Mark E. Lewis
- Operations Research
- 2013

We consider the question of how routing and allocation can be coordinated to meet the challenge of demand variability in a parallel queueing system serving two types of customers. A decision-makerâ€¦ (More)