排序方式: 共有39条查询结果,搜索用时 15 毫秒
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We consider queueing systems with multiple classes of customers and heterogeneous servers where customers have the flexibility of being processed by more than one server and servers possess the capability of processing more than one customer class. We provide a unified framework for the modeling and analysis of these systems under arbitrary customer and server flexibility and for a rich set of control policies that includes customer/server‐specific priority schemes for server and customer selection. We use our models to generate several insights into the effect of system configuration and control policies. In particular, we examine the relationship between flexibility, control policies and throughput under varying assumptions for system parameters. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004 相似文献
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We show that the linear objective function of a search problem can be generalized to a power function and/or a logarithmic function and still be minimized by an index priority rule. We prove our result by solving the differential equation resulting from the required invariance condition, therefore, we also prove that any other generalization of this linear objective function will not lead to an index priority rule. We also demonstrate the full equivalence between two related search problems in the sense that a solution to either one can be used to solve the other one and vice versa. Finally, we show that the linear function is the only function leading to an index priority rule for the single‐machine makespan minimization problem with deteriorating jobs and an additive job deterioration function. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011 相似文献
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通过对炮兵目标价值分析与排序的指标体系进行系统分析,在岛屿封锁这一特定的作战样式中选取了六种属性作为目标价值排序的准则,然后根据对各属性的评分,在权重未知的情况下从最优化角度出发,以各方案与理想方案的距离为目标函数建立了目标价值排序的优化模型,并采用拉格朗日乘数法对模型进行求解,得到最终的目标打击顺序. 相似文献
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基于植物的抗性基因具有保守序列,根据已克隆基因的保守序列设计探针,利用菌落杂交的方法,对东乡野生稻大片段基因组文库进行筛选,得到两个候选克隆.序列比对发现其中含有NB-ARC的保守序列,可用于后续转基因鉴定. 相似文献
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针对目前部队在制定装备计量保障计划时存在的效率低、难以达到计量保障力量的合理配置,易造成人力、物力和财力浪费等问题,提出了制定雷达旅团装备计量保障计划的排序优化方法.首先介绍雷达旅团计量保障计划的相关概念,然后建立了描述制定计量保障计划的数学模型,并提出了求解模型的优化方法,最后通过实例对模型进行了验证. 相似文献
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This article studies operations sequencing for a multi‐stage production inventory system with lead times under predictable (deterministic) yield losses and random demand. We consider various cases with either full or partial release of work‐in‐process inventories, for either pre‐operation or post‐operation cost structures, and under either the total discounted or average cost criteria. We derive necessary and sufficient criteria for the optimal sequence of operations in all cases. While the criteria differ in their specific forms, they all lead to the same principal: those operations with (1) lower yields, (2) lower processing costs, (3) longer lead times, and (4) lower inventory holding costs should be placed higher upstream in the system.Copyright © 2014 Wiley Periodicals, Inc. Naval Research Logistics 61: 144–154, 2014 相似文献
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