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作者：Inderfurth, Karl; Transchel, Sandra
作者单位：Otto von Guericke University; University of Mannheim
摘要：Bollapragada and Morton (1999) present several well-performing heuristics for solving the periodic inventory problem with random yield and demand. Their approach is essentially based on a transformation of the single-period problem into a standard newsvendor problem with deterministic yield and random demand which, however, is supply dependent. In our note, we show that their evaluation of the respective optimality condition is not correct. This explains the steady deterioration of their myopi...
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作者：Rosling, Kaj
作者单位：Linnaeus University; Vaxjo University
摘要：Rosling (2002) presents and analyzes five different cost-rate functions for single-item inventory models. The functions are referred to as Models 1-5. These errata correct an erroneous comment concerning Model 3 and render a rigorous argument for the functional form of Model 2.
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作者：Dasci, Abdullah; Laporte, Gilbert
作者单位：York University - Canada; Universite de Montreal; HEC Montreal
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作者：Hu, Xinmin; Ralph, Daniel
作者单位：University of New South Wales Sydney; University of Cambridge
摘要：We study a bilevel noncooperative game-theoretic model of restructured electricity markets, with locational marginal prices. Each player in this game faces a bilevel optimization problem that we model as a mathematical program with equilibrium constraints (MPEC). The corresponding game is an example of an equilibrium program with equilibrium constraints (EPEC). We establish sufficient conditions for the existence of pure-strategy Nash equilibria for this class of bilevel games and give some ap...
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作者：Chen, Xin; Sim, Melvyn; Simchi-Levi, David; Sun, Peng
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; National University of Singapore; Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); Duke University; Singapore-MIT Alliance for Research & Technology Centre (SMART); Massachusetts Institute of Technology (MIT); National University of Singapore; Nanyang Technological University
摘要：Traditional inventory models focus on risk-neutral decision makers, i.e., characterizing replenishment strategies that maximize expected total profit, or equivalently, minimize expected total cost over a planning horizon. In this paper, we propose a framework for incorporating risk aversion in multiperiod inventory models as well as multiperiod models that coordinate inventory and pricing strategies. We show that the structure of the optimal policy for a decision maker with exponential utility...
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作者：Shang, Kevin H.; Song, Jing-Sheng
作者单位：Duke University
摘要：We consider two models of stochastic serial inventory systems with economies of scale for which the forms of optimal policies are known. In the first model, each stage has a fixed-order quantity, while in the second model, there is a 141 fixed-order cost for external supplies. For each model, we show that the optimal policy parameters can be bounded and approximated by a series of independent, single-stage optimal policy parameters. We further construct closed-form bounds and approximations fo...
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作者：Zhao, Xiaobo; Fan, Fan; Liu, Xiaoliang; Xie, Jinxing
作者单位：Tsinghua University; Tsinghua University
摘要：We deal with an inventory system with limited storage space for a single item or multiple items. For the single-item system, customers' demand is stochastic. The inventory is controlled by a continuous-review (r, Q) policy. Goods are replenished to the inventory system with a constant lead time. An optimization problem with a storage-space constraint is formulated for computing a single-item (r, Q) policy that minimizes the long-run average system cost. Based on some existing results in the si...
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作者：Janakiraman, Ganesh; Seshadri, Sridhar
作者单位：New York University; University of California System; University of California Berkeley
摘要：We compare two inventory systems, one in which excess demand is lost and the other in which excess demand is back-ordered. Both systems are reviewed periodically. They experience the same sequence of identically and independently distributed random demands. Holding and shortage costs are considered. The holding cost parameter is identical; however, the cost of a lost sale could be different from the per-period cost of backlogging a unit sale. When these costs are equal, we prove that the optim...
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作者：Moulin, Herve
作者单位：Rice University
摘要：We look for protocols (service disciplines) setting an upper bound on the slowdown (expected sojourn time divided by job size) a job may face, irrespective of the processing times of other jobs. We call this worst slowdown the liability of a job. In a scheduling problem with identical release dates, allowing the server to randomize the order of service cuts almost in half the liability profiles feasible under deterministic protocols. The same is true if cash transfers are feasible and users ha...
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作者：Nunez, Manuel A.; Garfinkel, Robert S.; Gopal, Ram D.
作者单位：University of Connecticut
摘要：Data perturbation and query restriction are two methods developed to protect confidential data in statistical databases. In the former, the data is systematically changed to yield answers to queries that are statistically similar to those that would have resulted from the original data. The latter provides exact answers to queries as long as the risk of exact disclosure of confidential data does not become too great. We present a new methodology to combine these techniques so that the advantag...
