Optimal burn‐in procedure for periodically inspected systems

Burn‐in is a widely used method to improve the quality of products or systems after they have been produced. In this paper, we study burn‐in procedure for a system that is maintained under periodic inspection and perfect repair policy. Assuming that the underlying lifetime distribution of a system has an initially decreasing and/or eventually increasing failure rate function, we derive upper and lower bounds for the optimal burn‐in time, which maximizes the system availability. Furthermore, adopting an age replacement policy, we derive upper and lower bounds for the optimal age parameter of the replacement policy for each fixed burn‐in time and a uniform upper bound for the optimal burn‐in time given the age replacement policy. These results can be used to reduce the numerical work for determining both optimal burn‐in time and optimal replacement policy. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Technical note: Worst‐case performance of power‐of‐two policies for serial inventory systems with incremental quantity discounts

This study presents power‐of‐two policies for a serial inventory system with constant demand rate and incremental quantity discounts at the most upstream stage. It is shown that an optimal solution is nested and follows a zero‐inventory ordering policy. To prove the effectiveness of power‐of‐two policies, a lower bound on the optimal cost is obtained. A policy that has a cost within 6% of the lower bound is developed for a fixed base planning period. For a variable base planning period, a 98% effective policy is provided. An extension is included for a system with price dependent holding costs. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

数字磁阻磁场仪在自行式武器导航中的应用

介绍了以磁阻传感器为基础的数字磁阻磁场仪HMR2300的基本原理及其在自行式武器系统导航中的应用,重点叙述了在车体倾斜和有金属材料影响的情况下,对HMR2300输出结果的补偿和计算方法.     

地面战场多目标声探测识别系统的研究

讨论了声探测识别的原理,介绍了战场多目标声探测识别系统的构成及工作原理,对于系统构成的技术关键及解决途径进行了论述。     

“法条竞合”若干问题研究

"法条竞合"在我国刑事立法中普遍存在,其理论比较复杂.法条竞合的概念与种类、法律性质以及法条竞合的适用原则等问题,目前在我国刑法理论界尚无统一定论.理论上对这些问题进行深入研究、探讨,有助于在司法实践中准确选择适用法条.     

周佛海人生三步曲蜕变研究

周佛海曾是出席中国共产党"一大"的十三个代表之一,后来却投靠了国民党右派,再后来卖身给日本侵略者,堕落为臭名昭著的汉奸卖国贼。周佛海人生三步曲的蜕变是由于其个人野心不断恶性膨胀以及对共产主义丧失信念的结果。我们今天从反面总结他一生的教训,对于我们树立正确的人生观很有意义。     

析《儿女英雄传》中的程度副词“最”

本文拟就通过数据库数据对《儿女英雄传》中的程度副词"最"的语法功能进行分析,并与现代汉语中的"最"相比较。     

《檀香刑》非领格“咱家”的语用分析

“咱家”产生于宋元时代而通用于北方地区,具有方言特色,它用作单数自称时,相当于“我”,在一些地区被用作是带有情感标记的特殊称谓。莫言长篇小说《檀香刑》侧重了这种称谓的特殊性,以它所独有的语气和话语内涵在不同的情景语境中展现说话方自尊自大、傲慢无礼、调侃油滑、玩世不恭等情态,凸现“咱家”男性化的语用特征,从这一角度反映出“咱家”具有的一种倨称语用价值。     

“三个代表”重要思想是新时期治党治国的伟大旗帜——论“三个代表”重要思想的辩证统一性

“三个代表”重要思想开拓了马克思主义在当代中国的新境界,具有解放思想、实事求是、与时俱进的鲜明理论品质及其辩证统一性,是中国共产党历史经验和基本经验的有机统一的反映,是立足现实和展望未来发展要求的有机统一的反映,体现了全面推进党的建设新的伟大工程的辩证统一性。“三个代表”之间具有显著的辩证统一关系。     

浅析下岗职工的社会资本降低问题

下岗职工的社会关系 (以下简称“关系”)是下岗职工实现个人行动策略的关键因素 ,也是下岗职工寻求”第二职业”或其它新资源的关键因素 ,本文重点研究国有企业下岗职工所拥有的作为社会载体的社会网络弱化以及在弱化的社会网络中获取资源的能力低弱而带来的社会资本的降低