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作者：SCHOUTEN, FAV; VANNESTE, SG
摘要：Optimal group maintenance policies for a set of M identical machines subject to stochastic failures are considered. The control of the system is not based on the complete age configuration of all components, nor on the number of failed components only. We compromise between these two extreme cases by introducing four possible states for each component: good, doubtful, preventive maintenance is due, and failed. Two types of control policies are considered, both based on the number of doubtful c...
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作者：XU, SH; SHANTHIKUMAR, JG
作者单位：University of California System; University of California Berkeley
摘要：In this paper we obtain the optimal admission control policy for a first-come, first-served (FCFS) M/M/m ordered-entry queueing system to maximize the expected discounted (and the long-run average) profit (reward minus cost). We introduce a new approach for determining the optimal admission control policy. The underlying idea of this approach is to construct a dual system: a preemptive last-come, first-served (LCFS-P) M/M/m ordered-entry queueing system that is subject to expulsion control. We...
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作者：BRIMBERG, J; LOVE, RF
作者单位：McMaster University
摘要：This paper considers a general form of the single facility minisum location problem (also referred to as the Fermat-Weber problem), where distances are measured by an I,norm. An iterative solution algorithm is given which generalizes the well-known Weiszfeld procedure for Euclidean distances. Global convergence of the algorithm is proven for any value of the parameter p in the closed interval [1, 2], provided an iterate does not coincide with a singular point of the iteration functions. Howeve...
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作者：ROSEN, JB; XUE, GL
作者单位：University of Vermont
摘要：For the Euclidean single facility location problem, E. Weiszfeld proposed a simple closed-form iterative algorithm in 1937. Later, numerous authors proved that it is a convergent descent algorithm. In 1973, J. Eyster, J. White and W. Wierwille extended Weiszfeld's idea and proposed a Hyperboloid Approximation Procedure (HAP) for solving the Euclidean multifacility location problem. They believed, based on considerable computational experience, that the HAP always converges. In 1977, Ostresh pr...
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作者：DIABY, M
摘要：We present an implicit enumeration procedure for solving pure integer 0/1 minimax problems which arise in the context of Benders decomposition for mixed integer 0/1 linear programming problems, or in various practical settings such as the location of facilities and assembly line balancing. The procedure is an extension of the additive algorithm of E. Balas for pure integer 0/1 programming problems. We solve minimax problems directly (i.e., as minimax problems, not as mixed integer programming ...
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作者：MARTIN, JL; HARRISON, TP
摘要：Many firms with self-funded medical insurance administered by outside parties fail to review the administrators' performance effectively. Often the firms do not know the extent of overpayments because they lack the ''pert knowledge to evaluate the paid claims. We examine the use of a simple ''pert system in conjunction with optimization methods for identifying claims payment errors. The knowledge base is constructed using expertise from the areas of claims processing, auditing, medical diagnos...
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作者：LEE, HL; BILLINGTON, C
作者单位：Hewlett-Packard
摘要：A supply chain is a network of facilities that performs the functions of procurement of material, transformation of material to intermediate and finished products, and distribution of finished products to customers. Often, organizational barriers between these facilities exist, and information flows can be restricted such that complete centralized control of material flows in a supply chain may not be feasible or desirable. Consequently, most companies use decentralized control in managing the...
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作者：CAULKINS, JP
摘要：This paper introduces a model that describes how local drug markets might respond to intensive local enforcement operations known as crackdowns. The model supports the intuition of some drug policy analysts and makes concrete suggestions for how crackdowns should be managed.
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作者：MOSKOWITZ, H; PRECKEL, PV; YANG, AN
摘要：An approach to the solution of decision analysis problems under uncertainty with imprecise and incomplete information is presented. The methodology is designed for cases in which payoffs (conditional on the state of nature) are known precisely, but only limited or imprecise probability and utility information is available regarding a decision maker's beliefs and tastes. A decision maker provides: conditional payoffs, (optionally) bounds on state probabilities, bounds on the certainty equivalen...
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作者：DONOHUE, JM; HOUCK, EC; MYERS, RH
作者单位：Virginia Polytechnic Institute & State University
摘要：Construction of simulation designs for the estimation of response surface metamodels is often based on optimal design theory. Underlying such designs is the assumption that the postulated model provides the correct representation of the simulated response. As a result, the location of design points and the assignment of pseudorandom number streams to these experiments are determined through the minimization of some function of the covariance matrix of the model coefficient estimators. In contr...
