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作者：Balakrishnan, Anantaram; Li, Gang; Mirchandani, Prakash
作者单位：University of Texas System; University of Texas Austin; Bentley University; Pennsylvania Commonwealth System of Higher Education (PCSHE); University of Pittsburgh
摘要：Long-term planning for transportation, telecommunications, and other service operations entails designing networks that are both cost effective and responsive. Because infrastructure networks are expensive and the network's design determines its service capabilities, planners must address complex trade-offs between minimizing the total cost of the network while meeting end-to-end service requirements such as limits on transit time, latency, and transshipments. To address this problem, we study...
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作者：Lozano, Leonardo; Smith, J. Cole
作者单位：Clemson University
摘要：We examine bilevel mixed-integer programs whose constraints and objective functions depend on both upper-and lower-level variables. The class of problems we consider allows for nonlinear terms to appear in both the constraints and the objective functions, requires all upper-level variables to be integer, and allows a subset of the lower-level variables to be integer. This class of bilevel problems is difficult to solve because the upper-level feasible region is defined in part by optimality co...
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作者：Gao, Siyang; Chen, Weiwei; Shi, Leyuan
作者单位：City University of Hong Kong; Rutgers University System; Rutgers University Newark; Rutgers University New Brunswick; University of Wisconsin System; University of Wisconsin Madison; Peking University
摘要：In this paper, we present a new budget allocation framework for the problem of selecting the best simulated design from a finite set of alternatives. The new framework is developed on the basis of general underlying distributions and a finite simulation budget. It adopts the expected opportunity cost (EOC) quality measure, which, compared to the traditional probability of correct selection (PCS) measure, penalizes a particularly bad choice more than a slightly incorrect selection, and is thus ...
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作者：Hassin, Refael; Roet-Green, Ricky
作者单位：Tel Aviv University; University of Rochester
摘要：Classical models of customer decision making in unobservable queues assume acquiring queue length information is too costly. However, due to recent advancements in communication technology, various services now make this kind of information accessible to customers at a reasonable cost. In our model, which reflects this new opportunity, customers choose among three options: join the queue, balk, or inspect the queue length before deciding whether to join. Inspection is associated with a cost. W...
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作者：Samiedaluie, Saied; Kucukyazici, Beste; Verter, Vedat; Zhang, Dan
作者单位：University of Alberta; McGill University; University of Colorado System; University of Colorado Boulder
摘要：We study patient admission policies in a neurology ward where there are multiple types of patients with different medical characteristics. Patients receive specialized care inside the neurology ward and delays in admission to the ward will have negative impact on their health status. The level of this impact varies among patient types and depends on the severity of patients. Patients are also different in terms of arrival rate and length of stay at the ward. The patients normally wait in the e...
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作者：Hanasusanto, Grani A.; Roitch, Vladimir; Kuhn, Daniel; Wiesemann, Wolfram
作者单位：University of Texas System; University of Texas Austin; University of Texas System; University of Texas Austin; Imperial College London; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Imperial College London
摘要：We study joint chance constraints where the distribution of the uncertain parameters is only known to belong to an ambiguity set characterized by the mean and support of the uncertainties and by an upper bound on their dispersion. This setting gives rise to pessimistic (optimistic) ambiguous chance constraints, which require the corresponding classical chance constraints to be satisfied for every (for at least one) distribution in the ambiguity set. We demonstrate that the pessimistic joint ch...
