Variables inspection for SPC‐quarantined production

When a control chart signals an out‐of‐control condition for a production process, it may be desirable to “quarantine” all units produced since the last in‐control SPC sample. This paper presents an efficient procedure for variables inspection of such “SPC quarantined” product. A Bayesian sequential inspection procedure is developed which determines whether the out of control production is of acceptable quality. By inspecting the units in reverse of the order in which they were produced, the procedure is also capable of detecting the point at which the process went out of control, thus eliminating the need to inspect units produced prior to the onset of the out of control condition. Numerical examples are presented, and the performance characteristics of the procedure are demonstrated using Monte Carlo simulation. © 2001 John Wiley & Sons, Inc. Naval Research Logistics 48: 159–171, 2001     

Bayesian inference based on partial monitoring of components with applications to preventive system maintenance

Consider a binary, monotone system of n components. The assessment of the parameter vector, θ, of the joint distribution of the lifetimes of the components and hence of the reliability of the system is often difficult due to scarcity of data. It is therefore important to make use of all information in an efficient way. For instance, prior knowledge is often of importance and can indeed conveniently be incorporated by the Bayesian approach. It may also be important to continuously extract information from a system currently in operation. This may be useful both for decisions concerning the system in operation as well as for decisions improving the components or changing the design of similar new systems. As in Meilijson [12], life‐monitoring of some components and conditional life‐monitoring of some others is considered. In addition to data arising from this monitoring scheme, so‐called autopsy data are observed, if not censored. The probabilistic structure underlying this kind of data is described, and basic likelihood formulae are arrived at. A thorough discussion of an important aspect of this probabilistic structure, the inspection strategy, is given. Based on a version of this strategy a procedure for preventive system maintenance is developed and a detailed application to a network system presented. All the way a Bayesian approach to estimation of θ is applied. For the special case where components are conditionally independent given θ with exponentially distributed lifetimes it is shown that the weighted sum of products of generalized gamma distributions, as introduced in Gåsemyr and Natvig [7], is the conjugate prior for θ. © 2001 John Wiley & Sons, Inc. Naval Research Logistics 48: 551–577, 2001.     

无人机先进地面站关键技术综述

具有沉浸显示、智能辅助、自然化人机交互等先进控制能力的新型无人机地面站已成为当前无人机控制领域的研究热点。为分析其中的技术脉络,系统性地梳理国内外一系列无人机先进地面站的功能要点及设计理念,在此基础上从无人机地面站指挥控制的观察—判断—决策—行动回路出发,归纳提炼了其技术体系构成,分析指出了其中的任务环境构建、战场态势沉浸式显示、智能化辅助决策和自然化人机交互等关键技术,并对各项技术的主要研究方法进行了深入剖析,还对无人机先进地面站目前存在的挑战和未来发展趋势进行了研判。该研究对新型地面站的研制具有指导和借鉴意义。     

基于6LoWPAN与MQTT的无线传感网络设计

针对目前6LoWPAN无线传感网络设计与应用存在的可扩展性较差、与IPv4环境不兼容等问题,设计并实现了基于6LoWPAN与消息队列遥控传输(Message Queuing Telemetry Transport, MQTT)的无线传感网络。其中,无线传感网络节点作为MQTT客户端与MQTT服务器通信,边界路由器通过NAT64(Network Address Translation IPv6 to IPv4)实现无线传感网络节点与IPv4网络的通信。将所设计的无线传感网络应用到智能家居场景,评估了无线传感网络和边界路由器的性能,测试了系统功能的实现。结果表明,无线传感网络具有良好的连通性和稳定性,无线传感节点的数据上传与指令接收稳定可靠,边界路由器工作稳定,系统具有较好的性能。     

地缘政治危机与晚清政府边防政策的三次调整

摘要：鸦片战争后,中国边疆危机纷至沓来。晚清政府在不到30年的时间里,三次调整边防策略,相继形成了“郅治保邦”、“海防与塞防并重”和“保藩固圉”的边防政策,这在一定程度上遏制了帝国主义的兵锋战火。但又造成了“和”不能争主权、“战”不能取胜利的被动局面,加剧了清政府的民族危机、边防危机和统治危机。     

谈提高边防检查人员外语应用能力的途径

边防检查人员学好外语、用好外语,既是树立良好国门形象的需要,也是打击涉外违法犯罪活动的必然要求。对当前边防检查人员应用外语开展工作的现状进行了分析,并结合工作实践,提出创造语言环境、关注时事新闻、注重实践运用、重点选择语种以及坚持落实等提高检查人员外语应用能力的途径。     

建筑消防设施运行可靠性探析

简要阐述了建筑消防设施的主要分类、作用、维护管理要求等,着重分析了消防供电、供水、设施联动、人机协调等方面可靠性存在的问题,从落实检测保养、人员素质、预案演练、监督检查等方面分析问题形成的原因,并提出解决问题的几点措施。     

边防毗邻省区跨域协同警务战略研究

在非传统安全威胁不断增多的情况下,公安边防部队维护边疆社会治安和政治大局稳定的职能作用更加凸现。针对公安边防部队点多、线长、面广的特点和毗邻省区结合部管理防范相对薄弱的实际,研究探索新形势下加强毗邻跨域警务协同、联手固边的工作机制,形成无缝链接——“全国边防一盘棋”的整体战略,全面提升公安边防部队战斗力,具有极其重要的现实意义。     

ISO质量管理体系引入边防检查执法工作的思考

ISO9001是企业有效的质量控制管理体系,在其他行政管理部门中也有应用。在公安边防执法规范化建设工作中,如何对边防检查执法质量进行全程监控,是困扰边防部队执法规范化建设的瓶颈。将ISO9001质量控制管理体系引入边防检查行政执法实践中,有利于实现边防检查行政执法质量的新突破。     

边境地区群体性事件预警指标体系构建研究

科学、可行的指标体系是群体性事件预警的核心。在坚持完备性与最小性原则、科学性与可行性原则、敏感性与动态性原则、全局性与针对性原则的前提下,利用层次分析法、专家调查法,构建了以边境地区经济、社会保障、公共安全维护、民族与宗教、边民心理状况以及周边环境六大因素为支撑的边境地区群体性事件预警指标内容,并形成了6个一级指标,12个二级指标,44个三级指标的边境地区群体性事件预警指标体系。