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作者：Teo, CP; Shu, J
作者单位：National University of Singapore
摘要：In this paper, we study the distribution network design problem integrating transportation and infinite horizon multiechelon inventory cost function. We consider the trade-off between inventory cost, direct shipment cost, and facility location cost in such a system. The problem is to determine how many warehouses to set up, where to locate them, how to serve the retailers using these warehouses, and to determine the optimal inventory policies for the warehouses and retailers. The objective is ...
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作者：Chen, SX
作者单位：Nanyang Technological University
摘要：The one-item, periodic review production and inventory system has been extensively studied in literature. Theories have been established for various basic constructs of the system of either finite or infinite horizon, except for the case where production capacity is finite and production cost contains a fixed (as well as a variable) component. It was conjectured in earlier research papers that the modified (s, S) policy would be optimal to the finite-capacity, fixed cost model in infinite hori...
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作者：Baldacci, R; Maniezzo, V; Mingozzi, A
作者单位：Universita di Modena e Reggio Emilia; University of Bologna; University of Bologna
摘要：Car pooling is a transportation service organized by a large company which encourages its employees to pick up colleagues while driving to/from work to minimize the number of private cars travelling to/from the company site. The car pooling problem consists of defining the subsets of employees that will share each car and the paths the drivers should follow, so that sharing is maximized and the sum of the path costs is minimized. The special case of the car pooling problem where all cars are i...
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作者：Hall, NG; Potts, CN
作者单位：University System of Ohio; Ohio State University; University of Southampton
摘要：This paper considers scheduling problems where a set of original jobs has already been scheduled to minimize some cost objective, when a new set of jobs arrives and creates a disruption. The decision maker needs to insert the new jobs into the existing schedule without excessively disrupting it. Two classes of models are considered. First, we minimize the scheduling cost of all the jobs, subject to a limit on the disruption caused to the original schedule, where this disruption is measured in ...
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作者：Glazebrook, K; Washburn, A
作者单位：University of Edinburgh; United States Department of Defense; United States Navy; Naval Postgraduate School
摘要：We consider the optimal use of information in shooting at a collection of targets, generally with the object of maximizing the average number (or value) of targets killed. The shooting problem is viewed as a Markov decision process, and the modal solution technique is stochastic dynamic programming. Information obtained about target status may or may not be perfect, and there may or may not be constraints on the number of shots. Previous results are reviewed, and some new results are obtained.
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作者：Li, HJ; Xu, SH
作者单位：Washington State University; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park
摘要：We study a system with multiple components and preventive maintenance. At predetermined times, some of the components are replaced with new ones. We permit the set of components that are chosen for replacement to be random and study the effect of dependency in this selection. For example, we show that it is often better to have simultaneous replacements of components, rather than replacing each component independently of the others. We also show that preventive maintenance only makes sense for...
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作者：Haksöz, C; Seshadri, S
作者单位：New York University
摘要：dIn this paper we provide necessary and sufficient conditions for the distribution of demand in the future to be stochastically increasing in the demand that has been observed in the past. We base our analysis on the multiperiod inventory model examined by Eppen and Iyer (1997). In the process of establishing the necessary and sufficient conditions we develop a new property called the sequential monotone likelihood ratio property.
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作者：Atamtürk, A
作者单位：University of California System; University of California Berkeley
摘要：We show that superadditive lifting functions lead to sequence independent lifting of inequalities for general mixed-integer programming. As an application, we note that mixed-integer rounding (MIR) may be viewed as sequence independent lifting. Consequently, we obtain facet conditions for MIR inequalities for mixed-integer knapsacks.
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作者：Janakiraman, G; Muckstadt, JA
作者单位：New York University; Cornell University
摘要：We consider periodic review inventory control problems in directed networks, primary examples of which are distribution systems and assembly systems. External demand could occur at each node. When inventory is insufficient to meet requirements at a node, a portion of this demand is backordered and the remaining is lost. External demands, as well as lead times for inventory purchase, assembly, and transportation, are stochastic. In each period, linear sales revenues and the following costs, all...
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作者：Abbas, AE; Holmes, SR
作者单位：Stanford University; Stanford University
摘要：In April of 2003, Science (2003) and Nature (2003) published special issues marking two significant achievements in the history of science: the 50th anniversary of discovering the double helical structure of the DNA, and the completion of the Human Genome Project. The first discovery led to a new age in genetics, and the second event marked the beginning of a new era that uses the genome in medicine. The international efforts to determine the human DNA sequence and assess its ethical, legal, a...
