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小口径速射舰炮受弹鼓容量及舰炮发射系统限制,一般不能在舰炮武器系统有效射击范围内全航路持续射击,这就要求对射击方法进行研究。应用蒙特卡洛法,在MATLAB软件平台上计算了小口径速射舰炮武器系统对匀速直线运动导弹的命中概率与弹丸相遇点距离间的关系,提出了以全航路最大概率命中导弹有效部位为基础制定射击终止点,反推射击起始点的射击方法,提高了舰炮武器系统在全航路射弹数限定条件下的命中概率;以舰炮武器系统跟踪器最大跟踪角速度限制因素为例,分析了导弹运动速度、航路捷径与射击区域的对应关系,并应用本方法对导弹典型航路的射击方案进行了仿真。仿真结果表明该方法在一定条件下能有效提高舰炮武器系统对导弹的全航路命中概率。 相似文献
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为充分考核末端反导舰炮武器系统的反导能力,结合末端反导舰炮武器系统拦截靶弹需求对威胁概率进行了分析,提出了相关计算模型,并给出了相应的计算结果。其思路及算法不仅直接适用于末端反导舰炮拦截靶弹的安全分析,对其它武器装备试验及训练的安全分析也具有一定的参考价值。 相似文献
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以某型反导舰炮武器系统为原型,通过分析舰炮武器系统反导作战过程,利用靶场舰炮武器系统的动态精度试验数据,建立了动态精度计算毁伤概率的数学模型,模拟了舰炮武器系统对导弹目标着发射击的毁伤概率,实现了毁伤概率的仿真计算,仿真结果与实弹射击结果接近.结果表明,应用这种方法,可以实现动态精度预估毁伤概率,为射击试验方案制定提供决策依据,也可以为舰炮武器系统射击效力的鉴定和效能评估提供参考. 相似文献
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具有“双重命中体制”的多功能小口径舰炮是近10年来才发展起来的舰载近程武器系统,它将直接与间接命中体制的优点结合起来,用一座舰炮发挥两种不同射击体制的作用,除具有对空对海作战效能之外,还使全航路反导毁伤概率得到较大提高,当然,这种多功能舰炮必须具备双路供弹系统和相应的自动更换弹种机构及其控制系统等特点。中国是世界上“双重命中体制”研究的先行者之一。 相似文献
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John Hussey Ian F.W. Beckett Hew Strachan Michael T. Isenberg 《Small Wars & Insurgencies》2013,24(1):158-163
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 相似文献
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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. 相似文献
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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 相似文献
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Uri Bar-Joseph 《战略研究杂志》2013,36(5):718-742
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. 相似文献
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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。 相似文献
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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。 相似文献
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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. 相似文献
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Douglas Mastriano 《Defense & Security Analysis》2017,33(1):68-76
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. 相似文献
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Stephen A. Emerson 《Small Wars & Insurgencies》2013,24(4):669-687
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. 相似文献