协作虚拟原型技术及其应用

传统的物理原型方法已不能满足现代工程产品,特别是新型武器装备发展的需要。协作虚拟原型是在分布式环境下,多领域专家协作建立虚拟原型的方法和技术。应用协作虚拟原型技术,可以使产品的设计者、使用者和制造者,在产品研制的早期,在虚拟环境中,直观形象地对虚拟的产品原型进行设计优化、性能测试,以及制造仿真和使用仿真。     

虚拟现实技术在复杂产品装配中的应用

结合某航天器类产品在总装过程中遇到的实际问题,介绍了运用虚拟现实技术建立虚拟装配应用系统的主要作用,虚拟装配系统功能、关键技术、系统组成、应用流程,以及应用实效.该应用系统在提高复杂产品装配工艺设计质量,减少操作返工,缩短研制和批次制造周期等方面发挥了重要作用.     

复杂零件产品虚拟开发技术研究

本文针对复杂零件产品制造精度要求高,工艺性差,残次品率高,生产周期长等特点,在探讨虚拟产品开发技术及其原型系统的基础上,提出了一种复杂零件产品开发的新模式：即在虚拟状态下对产品进行构思、设计、分析、仿真、装配、测试、性能及经济性评估、快速原型及产品数据管理等。     

虚拟样机技术在防空武器研发中的应用

一、引言虚拟样机技术的发展源于航天和军事部门。虚拟样机技术是当前设计制造领域的一门新技术,涉及多体系统动力学,计算与软件工程等科学。它利用软件建立机械系统的三维实体模型和力学模型,分析和评估系统的性能,从而为物理样机的设计和制造提供参数依据。虚拟样机技术在设计的初级阶段——概念设计阶段就可以对整个系统进行完整的分析,可以观察并试验各组成部件的相互运动情况。使系统仿真软件在各种虚拟环境中真实地模拟系统的运动,它可以在计算机上方便地修改设计缺陷,仿真试验不同的设计方案,对整个系统不断修改,直至获得最优设计方…     

成功发射精准入轨的重要保障——中国航天科工集团为“天宫一号”突破多项产品技术

航天科工集团公司具备完整的固体运载火箭及空间技术产品技术开发和研制生产体系．长期以来,其产品和技术在载人航天、探月工程等多个国家重大项目建设中发挥了重要作用,是我国空间领域的重要力量。在这次”天宫一号”研制发射工程中,航天科工集团取得了多项产品技术突破．为成功发射精准入轨提供了重要保障。     

面向军工行业的电子产品提供商和方案解决商——热烈庆祝中国航天科技集团公司五院五一三所建所50周年

正中国航天科技集团公司五院513所,始建于1966年,位于山东省烟台市国家高新技术产业开发区,是山东省一家从事航天高科技研究的科研事业单位,国家高新技术企业,航天电子产品重要研制单位,全国文明单位。513所主要从事空间信息系统与综合电子、测控与通信、电力电子、计算机应用、微电子技术研发与产品研制,以及防务装备测控系统、运载火箭(上面级)综合电子、微小卫星制造等方面的技术研发、设备研制和技术服务,拥有完整成熟的宇航和武器产业电子产品科研、生产、试验体系。     

技术标准在科技创新中的作用

武器装备和主导产业产品的研制和生产涉及大量的人力、物力和高新技术,使产品的设计和制造关系更加复杂,技术协调的难度更大。如此复杂的技术工作,只有在技术和管理两方面采用大量的有关标准——尤其是技术标准——来规范各项设计、制造行为,才有可能实现研制工作的有序、高效,保证在规定的研制周期内,制造出符合要求的产品。     

用虚拟工具改进产品设计

在当今全球竞争的产品市场中,制造商不得不寻找多种方法降低整个制造成本,以更短的时间生产出质量更好的产品,并且要按时交货,这是制造商在这个竞争的市场中生存的惟一出路。制造商只有提供多种多样的产品才能维持住一个市场份额。但是传统的反复设计的方法以及制造实际样品时的花费导致产品研制的时间过长,制造成本过高。选择合适的装配方法以及规划装配     

以发展战略为龙头 促民用产业发展

经过四十多年的建设与发展,四川航天工业总公司逐步建立了以重大装备制造、综合与精密机械加工、控制制导设备、伺服机构与电液控制系统、涡喷发动机、火工装置、光电显示为特长的科研生产能力,形成了以战略武器批生产、竞争性战术武器和宇航产品研制生产、航天产品配套协作生产为主的军工产品科研生产体系。     

贵州航天精工制造有限公司

贵州航天精工制造有限公司是通过主辅分离、辅业改制重组的投资主体多元化的现代股份制企业．是有40年航空航天紧固件和橡胶件专业研制、生产历史的军工产品制造企业。     

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.