防空通信系统性能评价及抗毁性分析

分析了防空通信系统的组织结构和对抗特点,利用性能评价过程代数描述防空通信系统的状态演化,提出一种防空通信系统抗毁特性分析方法。通过具体案例,对通信系统的组织结构、抗击软硬杀伤的能力进行建模和仿真验证。实验结果表明,该方法适用于防空通信系统的建模与分析,能够实现对防空通信系统的结构进行对抗过程的建模;通信系统的不同要素对抗毁性能的影响不同,可以采取有效策略以提高防空通信系统的抗毁能力。     

舰艇编队防空过程建模及分析

防空作战是大型水面舰艇编队的主要作战样式之一。运用PEPA(性能评价过程代数)方法对舰艇编队防空作战全过程进行有效建模,形式化描述了预警探测、情报传递、命令下达、防空拦截等作战主要过程。建立的PEPA模型具有层次化结构,考虑了要素间相互协作,体现了编队防空作战分布、并发的特点。通过对建立的PEPA模型进行性能指标选择和稳定状态分析,得到了不同因素对编队能力发挥的影响情况,获得了防空作战的基本要素组成,从而提供了一种解决舰艇编队问题的新方法。     

基于PEPA的舰艇编队防空过程建模及分析

防空作战是大型水面舰艇编队的主要作战样式之一。本文运用PEPA（性能评价过程代数）方法对舰艇编队防空作战全过程进行有效建模,形式化描述了预警探测、情报传递、命令下达、防空拦截等作战主要过程。建立的PEPA模型具有层次化结构,考虑了要素间相互协作,体现了编队防空作战分布、并发的特点。通过对建立的PEPA模型进行性能指标选择和稳定状态分析,得到了不同因素对编队能力发挥的影响情况,获得了防空作战的基本要素组成。从而提供了一种解决舰艇编队问题的新方法。     

基于依赖网络理论的后勤指挥系统建模与抗毁性分析

从复杂网络的角度出发,将后勤指挥系统分为指挥网络和通信网络两个子系统,采用依赖网络理论对其依赖关系进行描述,建立了后勤指挥系统模型.分析了指挥节点和通信节点不同的失效过程并提出抗毁性算法.将仿真实验结果与传统单层网络建模方法的结果进行比较,表明基于依赖网络理论构建模型的方法和抗毁性算法可以应用于后勤指挥系统的抗毁性分析,且能进一步细化抗毁性评估的结果.     

区域防空作战体系网络拓扑结构分析与建模

在系统描述区域防空作战体系组成结构的基础上,通过对基于平台和基于网络2种不同模式的区域防空作战体系结构的分析,运用复杂网络理论分别构建了其网络拓扑结构模型,并对其网络特征参数进行分析比较。可以看出,同基于平台的区域防空作战体系相比,基于网络的区域防空作战体系的鲁棒性和抗毁性更强,更适合未来防空作战需求。     

卫星通信网络拓扑与抗毁性关系研究

本文分析了卫星通信的网络拓扑结构,研究了网络拓扑结构对系统抗毁性的影响,提出了网络生存性和网络抗毁性的指标,并针对军用卫星通信的现状,对抗毁性进行了分析,认为从抗毁性的角度,多星多级网络具有更好的抗毁性能。     

基于ARM的防空协同设备人机交互功能的设计

在防空作战领域内,对信息的实时性要求较高,各个武器平台和作战节点之间的协同配合日趋重要.防空作战已不再是单一兵器的对抗,已上升为防空体系的对抗.为适应国际军贸市场的需求,构建防空协同作战系统,研发某型防空协同控制设备.协同设备采用分布式无中心自组网技术设计,具有较强的易用性和抗毁性.其核心是通信控制及数据处理模块,包括通信控制管理单元、数据处理单元、时空服务单元、通信接口控制管理单元、人机交互单元、状态显示及告警单元.根据某军贸项目的总体要求,设计了一种基于ARM的模块,包括人机交互、状态显示、告警等功能.     

基于Petri网的防空群决策信息传输能力分析

决策信息传输能力的大小,直接决定着防空作战行动的作战效能,进而决定了防空作战的成败。针对防空群决策信息传输问题,用Petri网建模,从时效性和可靠性两个方面,对防空群的决策信息传输能力进行了分析,得到了不同指挥方式下的信息传输能力的度量。对防空群通信能力的分析和指挥体制的优化有一定的借鉴和指导意义。     

基于对抗的防空体系结构演化性概念建模

为定量研究空防体系对抗过程,基于对空防体系对抗相关研究方法分析,提出从体系结构角度研究空防体系对抗.通过阐述对抗条件下的防空体系结构演化性建模思想,提出空防体系对抗实质是一个防空体系结构“动态编成—对抗消耗—优化修复”动态循环演化过程.在此基础上,围绕其中3个环节进行防空体系结构演化性概念建模,以此为空防体系对抗定量建模研究提供一种新思路.     

地面防空作战信息对抗模型研究及仿真

在地面防空作战中,地空导弹和空中目标的对抗是一个动态的对抗过程。通过把模型分为自身状态和对对方的估计状态,建立了防空作战对抗模型,分析了导弹追击和目标逃避时的控制输入的选择原则。通过仿真,得到了较好的结论,体现了导弹和目标之间的对抗性,对进一步研究地面防空系统对抗性建模方法具有重要意义。     

Reviews

Douglas S. Derrer, We Are All the Target: A Handbook of Terrorism Avoidance and Hostage Survival. Annapolis, MD: US Naval Institute Press, 1992. Pp. x+135, notes, index. $14.95. ISBN 01–55750–150–5

Ian Knight, Zulu: Isandlwana and Rorke's Drift, 22–23 January 1879. London: Windrow & Greene, 1992. Pp.136, 150 illus., incl 8 colour plates, maps, biblio. £35. ISBN 1–872004–23–7

Ian Knight, By the Orders of the Great White Queen: Campaigning in Zululand through the Eyes of the British Soldiers, 1879. London: Greenhill Books and Novato: Presidio Press, 1992. Pp. 272, 17 illus., 1 map. £18.95. ISBN 1–85367–122–3

Manfried Rauchensteiner and Erwin A. Schmidl (eds.), Formen des Krieges: vom Mittelalter zum ‘Low‐intensity’ Conflict’. Graz : Verlag Styria, 1991. Pp.208. DM35. ISBN 3–22–12139–7

Harold J. Kearsley, Maritime Power and the Twenty‐First Century. Dartmouth: Dartmouth Publishing Company, Limited, 1992. Pp.xv + 203, 13 diagrams, index. £32.50. ISBN 1–85521–288–9     

Panjwai: a tale of two COINs in Afghanistan

The US Army has two approaches to counterinsurgency operations in Afghanistan. One is hard, or combat-focused, and the other is soft, or development-focused. This study examines two US Army task forces deployed to Panjwai District, Afghanistan from 2012 to 2013. CTF 4-9 and 1-38 offer a meaningful comparison because they pursued these contrasting approaches among the same population and against the same enemy at the same time and place. The study compares each unit’s approach and finds that neither approach was successful absent the other. The article concludes by recommending further research into combining the approaches at the operational level.     

线性核时频信号表示及其仿真

根据ｃｈｉｒｐ信号在模糊域的特点,本文提出了线性核时频表示方法。这种方法在提高分辨率、消除交叉项以及抑制噪声等方面都具有较高的性能。理论分析和实验结果都证实了这种方法的有效性     

Putin – the masked nemesis of the strategy of ambiguity

Recent events demonstrate the complex and adaptive approach employed by Russia to reassert influence in Europe. The changing face of Russia’s strategy commenced in 2007 when it launched a crippling cyber-attack against Estonia. This was followed by a large Russian conventional attack against Georgia in 2008, occupying two large areas of the nation. 2014 witnessed the Russian annexation of Crimea where in just a week, Russia seized control of Crimea “without firing a shot.” The annexation of Crimea was rapidly followed by a Russian inspired and led subversive war in eastern Ukraine. The common thread among these diverse Russian operations is its use of ambiguity to confound and confuse decision makers in the West.     

Forecasting a Hurricane: Israeli and American Estimations of the Khomeini Revolution

The surprising ‘Arab Spring’ raises the question as to what would enable national intelligence to provide high quality warnings prior to the eruption of popular revolutions. This article uses new sources of evidence to trace and explain Israel's success in comparison to US failure at correctly estimating the course of the Iranian Revolution in 1977–79. In explaining this variance, the article shows that it was mainly the result of the intimate acquaintance of Israel's representatives in Iran with the local language, history and culture, as well as the ability to communicate with locals – tools which the Americans completely lacked.     

关于教师继续教育培训模式的思考

继续教育作为终身教育的重要组成部分和基本形式,对教师的发展成长意义重大。继续教育工作开展十多年来,取得了一定的成绩,但还存在不少问题,如学习动机较为被动,管理认识不到位,教学内容陈旧空泛,教学方法呆板机械等。随着课程改革的不断深入,继续教育必须采取相应的改进措施,树立以人为本,服务至上的观点,教学内容的前瞻性与实用性并重,教学人员进行整合,教学方法灵活多样,评价考核规范科学等,以此激活受训教师内在的学习动机,更大程度地提高继续教育培训的实际效果。     

用DirectShow实现网络视频

目前市场上的网络监控技术一般用昂贵的硬件设备来支撑,投资较大。在深入研究微软的DirectX9.0的基础上,提出如何用DirectShow软件技术和普通的数字摄像头来实现网络视频的监控和实现技术,内容涉及通信协议、视频的编码与解码技术、视频的编码格式和COM组件编程技术等,最终的实验结果令人满意,且费用低廉,技术可靠,为在高速局域网内构建视频监控系统提供有效的技术支持。     

Interpreting the Ribchester Helmet

In 1796 a 13-year-old boy playing on wasteland behind his father’s house in Ribchester, Lancashire discovered an assemblage of over 30 Roman artefacts, including a decorated brass helmet. Although partially corroded the Ribchester helmet is a fine example of a first-century AD cavalry sports helmet. This article considers how the interpretation of the helmet has evolved since its discovery. The multi-faceted iconography of the helmet with its mural crown diadem is that of an elite soldier and is paralleled in other examples of cavalry sports helmets of the Ribchester type. The long-neglected imagery on the helmet bowl is reinterpreted and seen not as a haphazard collection of randomly placed combatants but as a highly structured, symmetrical composition specifically designed to be viewed from different directions.     

Desert insurgency: lessons from the third Tuareg rebellion

This article provides an in-depth examination and analysis of the 2006–2009 Tuareg rebellion in Mali and Niger. It identifies the underlying reasons behind the rebellion, explores contrasting counter-insurgency (COIN) strategies employed by the two governments, and presents some lessons learned. While both COIN approaches ultimately produced similar peace settlements, the article argues that the Malian strategy of reconciliation combined with the selective use of force was far more effective than the Nigerien iron fist approach at limiting the size and scope of the insurgency and producing a more sustainable peace. It concludes by looking at the role of external actors, particularly the United States, and how the failure to internationalize the conflict was actually more beneficial to the local COIN effort, as well as to the longer strategic interests of the United States in the region.