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461.
Consider a set of product variants that are differentiated by some secondary attributes such as flavor, color, or size. The retailer's problem is to jointly determine the set of variants to include in her product line (“assortment”), together with their prices and inventory levels, so as to maximize her expected profit. We model the consumer choice process using a multinomial logit choice model and consider a newsvendor type inventory setting. We derive the structure of the optimal assortment for some important special cases, including the case of horizontally differentiated items, and propose a dominance relationship for the general case that simplifies the search for an optimal assortment. We also discuss structural properties of the optimal prices. Finally, motivated by our analytical results, we propose a heuristic solution procedure, which is shown to be quite effective through a numerical study. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007 相似文献
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基于CATIA的油料装备电子样机应用研究 总被引:1,自引:0,他引:1
电子样机技术可以系统应用于油料装备的设计和开发,使高质量、高效和低成本的油料装备的研制和制造成为了可能。基于CATIA把电子样机技术应用于新一代油料装备的研制,对油料装备电子样机建立的一般方法和基本流程进行研究,探索油料装备新的设计方法,避免了多次试制物理样机,大大节约了设计安装的成本,加速了研制进程。 相似文献
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从核电站压水堆动力装置在运行中ΔT超温度 /超功率保护功能出发 ,介绍了压水堆ΔT超温度 /超功率保护系统 ,分析了确定极限限制线以及保护区的方法 ,并对此作出了评价 . 相似文献
467.
Common due date problems have been extensively discussed in the scheduling literature. Initially, these problems discussed finding a common due date for a set of jobs on a single machine. These single machine problems were later extended to finding the common due date on a set of parallel machines. This paper further extends the single machine problem to finding multiple common due dates on a single machine. For a basic and important class of penalty functions, we show that this problem is comparable to the parallel machine problem. © 2001 John Wiley & Sons, Inc. Naval Research Logistics 48: 293–298, 2001 相似文献
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The Selection Allocation Problem (SAP) is a single period decision problem which involves selecting profit‐maximizing (or cost‐minimizing) activities from various distinct groups, and determining the volume of those activities. The activities in each group are selected subject to the availability of that group's resource, which is provided by either pooling or blending raw inputs from several potential sources. Imbedded in the decision process is the additional task of determining how much raw input is to be allocated to each group to form the resource for that group. Instances of this problem can be found in many different areas, such as in tool selection for flexible manufacturing systems, facility location, and funding for social services. Our goal in this paper is to identify and exploit special structures in the (SAP) and use those structures to develop an efficient solution procedure. © 1999 John Wiley & Sons, Inc. Naval Research Logistics 46: 707–725, 1999 相似文献
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针对轴角测试在武器控制领域的重要性,以及满足现代工业对便携式数据采集与测量的要求,提出了一种采用虚拟仪器技术的便携式轴角信号测试方法.由便携式计算机和轴角信号采集器组成轴角测试硬件平台,通过EPP实现两者间的高速数据通讯,由软件完成对数据的采集、显示、存储以及分析处理.可实现四通道数据同时测量,单通道采集率可达400kbyte/s.该系统具有体积小,重量轻,功耗低、现场移动使用方便等特点,特别适用于科研、生产及维修领域的现场测试. 相似文献
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镍对重力分离SHS陶瓷内衬复合管的影响 总被引:5,自引:1,他引:4
采用SHS重力分离技术制备陶瓷内衬复合管,通过改变主燃烧配系组元Ni的含量,研究分析了金属Ni对陶瓷内衬复合管制备的燃烧特性及机械性能的影响。研究发现,适量的Ni粉能促进SHS燃烧进行,提高燃烧体系的绝热燃烧温度和陶瓷层的致密度,并且有助于形成金属/陶瓷界面过渡层,这极大提高了复合管的显微硬度和抗压剪强度。当Ni粉含量为19wt%时,陶瓷层的显微硬度和抗压剪强度分别最高达1764N/mm2和36.1MPa。 相似文献