Determining a threshold control policy for an imperfect production system with rework jobs

Consider a threshold control policy for an imperfect production system with only a work center handling both regular and rework jobs. An imperfect production system studied here, generates defect jobs by factors other than machine failures. A threshold control or (ω, s) policy sets the guideline for a work center to switch between regular and rework jobs. A production cycle begins with loading and processing of several batches of regular jobs with a lot size equal to s. The outcome of each completed regular job is an independent Bernoulli trial with three possibilities: good, rework, or scrap. Once the work center accumulates more than a threshold ω of rework jobs, it finishes the last batch of regular jobs and switches to rework jobs. The objective of this research is to find a threshold ω and a lot size s that maximize the average long‐term profit. The ultimate goal is to construct a simple algorithm to search for ω and s that can be implemented directly in production management systems, as a result of this work. © 1999 John Wiley & Sons, Inc. Naval Research Logistics 46: 273–301, 1999     

D2-C84 的手征同素异形体

本文指出Ｄ２－Ｃ８４具有手征特性,这个结论可以很好地解释为什么实验上获得的Ｄ２－和Ｄ２ｄ－Ｃ８４的产量之比为２：１．我们以Ｃ８４为例就福勒烯（ｆｕｌｌｅｆｅｎｅ）的同素异形体（ｉｓｏｍｅｒ）的结构、对称性及稳定性进行了定性的讨论。     

磁悬挂天平五自由度位置传感器的数学分析

磁悬挂平天的位置传感器具有一定的特殊性,它需要同时获取被悬挂的飞行器模型的多自由度位置分量。本文对这一问题进行了研究,并讨论了其工程实现问题。     

An optimal recursive method for various inventory replenishment models with increasing demand and shortages

We establish various inventory replenishment policies to solve the problem of determining the timing and number of replenishments. We then analytically compare various models, and identify the best alternative among them based on minimizing total relevant costs. Furthermore, we propose a simple and computationally efficient optimal method in a recursive fashion, and provide two examples for illustration. © 1997 John Wiley & Sons, Inc. Naval Research Logistics 44: 791–806, 1997     

一种雷达类型识别方法

针对目前雷达辐射源识别中存在的,对于数据库中未存储的雷达类型识别能力较差的情况,提出了一个雷达辐射源识别系统,在系统中将雷达的识别分为已知雷达识别和未知雷达识别两个部分分别进行,并给出了系统各个组成部分的实现原理。试验证明,本系统对于未知的雷达类型有着较强的识别能力。     

试论孙中山的军事伦理思想

本文扼要论述了孙中山的慎战思想、“以德服人,非以武力服人”的军事道德观念,“救国救民,勇于牺牲,甘于奉献”的军人人生观、军人“须具忠、智、仁、勇和决心”的军人道德规范以及“知难行易,身体力行”的军人道德修养观。     

论战后日本军事战略的依附性

二战结束后,日本在国际社会的监督下被迫进行了非军事化改造,“国家永远放弃拥有军队和交战权”的条款被写入日本国宪法。然而,日本在战败后不久就开始了重整军备的步伐,特别是在冷战结束后,其军事实力的发展更是咄咄逼人。这不能不引起人们对日本军事战略的关注和对其依附性的研究。     

应急作战装备物资供应链研究

把供应链管理理论应用到应急作战装备物资供应中,抛弃传统的管理模式,从应急作战装备物资供应链的内涵、应急作战装备物资供应链管理内容、应急作战装备物资供应链管理方法和应急作战装备物资供应链实施策略4个方面进行阐述,旨在提高应急作战条件下装备物资供应保障效率。     

FDTD方法对有孔屏蔽腔的电磁特性分析

介绍了研究有孔腔体电磁特性的一种算法：时域有限差分法（FDTD）,并用FDTD方法对带孔缝机箱的电磁屏蔽特性进行了仿真分析,从而验证该方法对有孔矩形腔屏蔽效能计算的有效性和可靠性。     

灰色关联理论在火灾分析中的应用

应用灰色关联分析理论,以2004～2008年中国火灾成因及后果的统计数据为样本,选取了造成火灾的6种原因,分别以事故起数、伤亡人数、直接经济损失为系统特征,对系统进行了关联度分析和优势分析,为掌握火灾发生规律及进行火灾预防等提供依据。