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作者：Toth, Sandor F.; Haight, Robert G.; Rogers, Luke W.
作者单位：University of Washington; University of Washington Seattle; United States Department of Agriculture (USDA); United States Forest Service
摘要：Urban growth compromises open space and ecosystem functions. To mitigate the negative effects, some agencies use reserve selection models to identify conservation sites for purchase or retention. Existing models assume that conservation has no impact on nearby land prices. We propose a new integer program that relaxes this assumption via adaptive cost coefficients. Our model accounts for the two key land price feedbacks that arise in markets where conservation competes with development: the am...
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作者：Johari, Ramesh; Tsitsiklis, John N.
作者单位：Stanford University; Massachusetts Institute of Technology (MIT)
摘要：We consider a model where a finite number of producers compete to meet an infinitely divisible but inelastic demand for a product. Each firm is characterized by a production cost that is convex in the output produced, and firms act as profit maximizers. We consider a uniform price market design that uses supply function bidding: firms declare the amount they would supply at any positive price, and a single price is chosen to clear the market. We are interested in evaluating the impact of price...
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作者：Chou, Mabel C.; Chua, Geoffrey A.; Teo, Chung-Piaw; Zheng, Huan
作者单位：National University of Singapore; Nanyang Technological University; Shanghai Jiao Tong University
摘要：We examine how to design a flexible process structure for a production system to match supply with demand more effectively. We argue that good flexible process structures are essentially highly connected graphs, and we use the concept of graph expansion (a measure of graph connectivity) to achieve various insights into this design problem. Whereas existing literature on process flexibility has focused on the expected performance of process structure, we analyze in this paper the worst-case per...
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作者：Ibrahim, Rouba; Whitt, Ward
作者单位：McGill University; Columbia University
摘要：We develop new, improved real-time delay predictors for many-server service systems with a time-varying arrival rate, a time-varying number of servers, and customer abandonment. We develop four new predictors, two of which exploit an established deterministic fluid approximation for a many-server queueing model with those features. These delay predictors can be used to make delay announcements. We use computer simulation to show that the proposed predictors outperform previous predictors.
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作者：Kwon, H. Dharma; Lippman, Steven A.
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; University of California System; University of California Los Angeles
摘要：We study the impact of learning on the optimal policy and the time-to-decision in an infinite-horizon Bayesian sequential decision model with two irreversible alternatives: exit and expansion. In our model, a firm undertakes a small-scale pilot project to learn, via Bayesian updating, about the project's profitability, which is known to be in one of two possible states. The firm continuously observes the project's cumulative profit, but the true state of the profitability is not immediately re...
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作者：Oezaltin, Osman Y.; Prokopyev, Oleg A.; Schaefer, Andrew J.; Roberts, Mark S.
作者单位：University of Waterloo; Pennsylvania Commonwealth System of Higher Education (PCSHE); University of Pittsburgh; Pennsylvania Commonwealth System of Higher Education (PCSHE); University of Pittsburgh
摘要：Seasonal influenza is a major public health concern, and the first line of defense is the flu shot. Antigenic drifts and the high rate of influenza transmission require annual updates to the flu shot composition. The World Health Organization recommends which flu strains to include in the annual vaccine, based on surveillance and epidemiological analysis. There are two critical decisions regarding the flu shot design. One is its composition; currently, three strains constitute the flu shot, an...
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作者：Chen, Xin; Zhou, Sean X.; Chen, Youhua (Frank)
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; Chinese University of Hong Kong
摘要：Motivated by the widespread adoption of dynamic pricing in industry and the empirical evidence of costly price adjustments, in this paper we consider a periodic-review inventory model with price adjustment costs that consist of both fixed and variable components. In each period, demand is stochastic and price-dependent. The firm needs to coordinate the pricing and inventory replenishment decisions in each period to maximize its total discounted profit over a finite planning horizon. We develop...
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作者：Perry, Ohad; Whitt, Ward
作者单位：Northwestern University; Columbia University
摘要：In a recent paper we considered two networked service systems, each having its own customers and designated service pool with many agents, where all agents are able to serve the other customers, although they may do so inefficiently. Usually the agents should serve only their own customers, but we want an automatic control that activates serving some of the other customers when an unexpected overload occurs. Assuming that the identity of the class that will experience the overload or the timin...
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作者：Hochbaum, Dorit S.; Moreno-Centeno, Erick; Yelland, Phillip; Catena, Rodolfo A.
作者单位：University of California System; University of California Berkeley; Texas A&M University System; Texas A&M University College Station; Alphabet Inc.; Google Incorporated
摘要：Databases are a significant source of information in organizations and play a major role in managerial decision-making. This study considers how to process commercial data on customer purchasing timing to provide insights on the rate of new product adoption by the company's consumers. Specifically, we show how to use the separation-deviation model (SD-model) to rate customers according to their proclivity for adopting products for a given line of high-tech products. We provide a novel interpre...
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作者：Oskoorouchi, Mohammad R.; Ghaffari, Hamid R.; Terlaky, Tamas; Aleman, Dionne M.
作者单位：California State University System; California State University San Marcos; University of Toronto; Lehigh University
摘要：We propose an interior point constraint generation (IPCG) algorithm for semi-infinite linear optimization (SILO) and prove that the algorithm converges to an epsilon-solution of SILO after a finite number of constraints is generated. We derive a complexity bound on the number of Newton steps needed to approach the updated mu-center after adding multiple violated constraints and a complexity bound on the total number of constraints that is required for the overall algorithm to converge. We impl...
