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作者：Allon, Gad; Deo, Sarang; Lin, Wuqin
作者单位：Northwestern University; Indian School of Business (ISB)
摘要：In recent years, growth in the demand for emergency medical services, along with decline in the number of hospitals with emergency departments (EDs), has raised concerns about the ability of the EDs to provide adequate service. Many EDs frequently report periods of overcrowding during which they are forced to divert incoming ambulances to neighboring hospitals, a phenomenon known as ambulance diversion. The objective of this paper is to study the impact of key operational characteristics of th...
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作者：Pinker, Edieal J.
作者单位：Yale University
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作者：Gong, Xiting; Chao, Xiuli
作者单位：Chinese University of Hong Kong; University of Michigan System; University of Michigan
摘要：This paper studies the optimal control policy for capacitated periodic-review inventory systems with remanufacturing. The serviceable products can be either manufactured from raw materials or remanufactured from returned products; but the system has finite capacities in manufacturing, remanufacturing, and/or total manufacturing/remanufacturing operations in each period. Using L-natural convexity and lattice analysis, we show that, for systems with a remanufacturing capacity and a manufacturing...
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作者：Kong, Qingxia; Lee, Chung-Yee; Teo, Chung-Piaw; Zheng, Zhichao
作者单位：Universidad Adolfo Ibanez; Hong Kong University of Science & Technology; National University of Singapore
摘要：In this paper we investigate a stochastic appointment-scheduling problem in an outpatient clinic with a single doctor. The number of patients and their sequence of arrivals are fixed, and the scheduling problem is to determine an appointment time for each patient. The service durations of the patients are stochastic, and only the mean and covariance estimates are known. We do not assume any exact distributional form of the service durations, and we solve for distributionally robust schedules t...
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作者：Lin, Kyle Y.; Atkinson, Michael R.; Chung, Timothy H.; Glazebrook, Kevin D.
作者单位：United States Department of Defense; United States Navy; Naval Postgraduate School; United States Department of Defense; United States Navy; Naval Postgraduate School; Lancaster University
摘要：This paper presents a patrol problem, where a patroller traverses a graph through edges to detect potential attacks at nodes. To design a patrol policy, the patroller needs to take into account not only the graph structure, but also the different attack time distributions, as well as different costs incurred due to successful attacks, at different nodes. We consider both random attackers and strategic attackers. A random attacker chooses which node to attack according to a probability distribu...
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作者：Cook, Wade D.; Harrison, Julie; Imanirad, Raha; Rouse, Paul; Zhu, Joe
作者单位：York University - Canada; University of Auckland; Worcester Polytechnic Institute
摘要：Data envelopment analysis (DEA), as originally proposed, is a methodology for evaluating the relative efficiencies of a set of homogeneous decision-making units (DMUs) in the sense that each uses the same input and output measures (in varying amounts from one DMU to another). In some situations, however, the assumption of homogeneity among DMUs may not apply. As an example, consider the case where the DMUs are plants in the same industry that may not all produce the same products. Evaluating e...
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作者：Lopes, Leo; Smith-Miles, Kate
作者单位：SAS Institute Inc; Monash University
摘要：Generating valid synthetic instances for branch problems-those that contain a core problem like knapsack or graph coloring, but add several complications-is hard. It is even harder to generate instances that are applicable to the specific goals of an experiment and help to support the claims made. This paper presents a methodology for tuning instance generators of branch problems so that synthetic instances are similar to real ones and are capable of eliciting different behaviors from solvers....
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作者：Washburn, Alan
作者单位：United States Department of Defense; United States Navy; Naval Postgraduate School
摘要：This paper considers abstract election games motivated by the United States Electoral College. There are two political parties, and the electoral votes in each state go to the party that spends the most money there, with an adjustment for a head start that one party or the other may have in that state. The states have unequal numbers of electoral votes, and elections are decided by majority rules. Each party has a known budget, and much depends on the information that informs how that budget i...
