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.     

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。     

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。     

面向武器装备全寿命周期管理的虚拟原型技术

武器装备全寿命周期管理是降低武器装备研制开发费用、缩短研制周期,提高新武器装备战斗力的主要技术途径。虚拟原型技术已经成为支撑武器装备全寿命周期管理的关键技术,贯穿到武器装备概念设计、研制开发、生产管理、测试评估、维修训练等全寿命过程。本文综合论述了虚拟原型技术的概念,应用与发展前景,并结合总装备部职能转变,提出了应用先进虚拟原型技术,制定科学高效的武器装备采办政策与工作流程的建议。     

An Unlikely Alliance: Portuguese and South African Airpower in Angola, 1968–1974

The war that Portugal was obliged to fight in Africa began in 1961 and immediately stretched the resources of its armed forces. Nowhere was this thinness more apparent than in policing the vast territory of Angola. The east and southeast of Angola were particularly vulnerable, as the area was a vast, sparsely populated region characterised by enormous featureless plains or chanas covered in tall grass and broken by an extensive river system and mountainous forests. The only military solution to policing these immense spaces was aviation and specifically the helicopter that could carry troops into battle, protect them with a gunship and bring them home when the operation was concluded. The immediate problem for the Portuguese Air Force (Força Aérea Portuguesa or FAP) in Angola and elsewhere was a scarcity of helicopters. The solution was an alliance with South Africa, which had a strong inventory of Alouette IIIs, to help in policing the east. This move was likewise in the interest of South Africa, as its threat came from Zambia through south-eastern Angola. This article examines the strategic and tactical development of this unusual, cross-cultural alliance and the symbiotic relationship that resulted in destruction of the enemies of both in Angola.     

国内外结构钢焊条研究的现状与发展

本文主要介绍了国外焊条的现状和发展趋势,包括焊条的高韧性、高效率、低尘低毒和耐吸潮性能,为国内的焊条研究提供了参考依据。     

A Sign of Victory?: ‘Scottish Swords’ and Other Weapons in the Possession of the ‘Auld Innemie’

Many late medieval documents, notably inventories of arms and armour, of Englishmen contain references to ‘Scottish swords’ and other weapons. What did the compilers of these documents mean when they described a weapon as ‘Scottish’? How did such weapons come to be in the possession of these men? This article will attempt to explain this phenomenon drawing on primary documentary sources and surviving material culture from Glasgow Museums’ collections and others, as well as artworks from the period.     

Helping hands: civil–military cooperation and Italy's military operation abroad

In the Post-Bipolar Era the growing complexity of the military operations requires a new approach for the resolution of international crises. Since the end of the Cold War, peace support operations (PSO) have become the mainstay and principal occupation of most Western armies. At the same time, Italy has been one of the most important actors in such an area. The article focuses on the cooperation between military and civil components (a process called CIMIC) as a key variable in the Italian PSOs. We will analyse in detail the main lessons learned from past military interventions as well as the general context in which new tendencies are taking place. The maintaining of a minimum security frame becomes essential to fulfil activities ‘collateral’ to the mission: reconstructing services and infrastructure, food distribution, water and medication, law and order, de-mining, training of local forces, and supporting local institutions. These are the main tasks to obtain thrust and support from the population.     

Terrorism,insurgency, kidnapping,and security in Africa's energy sector

Energy continues to serve as the bedrock of modern economies and the main driver of modern society. For Africa, the production and supply of energy resources such as crude oil, natural gas, uranium, coal, biomass, biofuels and other renewables are an important source of employment, rents, taxes, royalties and profits. This sector brings in several tens of billions of dollars of revenue annually. The production and delivery of such resources, however, depend on critical infrastructures such as pipelines, refineries, processing plants, terminals, rigs, electrical energy pylons, substations, pump stations, vessels, and tankers. These infrastructures have been attacked by terrorists, insurgents, vandals and saboteurs, all of whom see them as targets against which to register their grievances and extract concessions from the state. This paper is a chronological account of some of the documented incidents of terrorism, insurgency, kidnapping, destruction, sabotage, and human casualties suffered in the oil and gas sectors in Africa between 1999 and 2012. It is based on data extracted from the databases of the RAND Database of World Terrorism Incidents and the University of Maryland's Global Terrorism Database (GTD).     

Cyberpower in Strategic Affairs: Neither Unthinkable nor Blessed

Abstract

This article explores the effect of connectivity on strategic affairs. It argues that the effect on war's character is potentially, although not yet shown in practice, considerably large. Its effect upon the distribution of power among states in the international system is small, contrary to the claims of ‘cyberwar’ alarmists. All told, however, its effect upon strategic affairs is complex. On the one hand, it represents a significant advance in the ‘complexification’ of state strategies, understood in the sense of the production of intended effects. On the other hand, strategists today – still predominantly concerned with the conflicts and confrontations of states and organised military power – are generally missing the power which non-traditional strategic actors, better adapted to the network flows of the information age, are beginning to deploy. These new forms of organization and coercion will challenge the status quo.     

Tacit support for terrorism: The rapprochement between the USSR and Palestinian guerrilla organizations following the 1967 war

This article demonstrates the inconsistent and wavering Soviet attitude towards national liberation movements in general and the Palestinian organizations in particular. Until the late 1960s, the Soviets viewed these organizations with suspicion, hesitating to engage in political dialogue with them. However, in the 1970s, political and military events in the region, as well as modifications in the Kremlin's Cold War strategies, led to a general shift towards the Middle East in Soviet foreign policy. Soviet leaders showed increased willingness to provide certain Palestinian organizations with arms with which to conduct terrorist activities against Israeli, pro-Israeli, Jewish and Western targets. The article explores the complex relations between Palestinian organizations and the USSR in the field of international terror. The study also exposes and analyzes the nature and content of Soviet–Palestinian arms dialogues and transactions. It provides clear evidence that Soviet policymakers and other luminaries were fully informed of, and sometimes directly involved in, these transactions and dialogues at the highest levels.     

A1 Qaeda and the radical Islamic challenge to western strategy

The September 11 global crisis prompted by the attacks on the World Trade Center and the Pentagon raises major questions concerning the nature and trajectory of terrorism in the post-Cold War global order. Hitherto, terrorism has been largely debated by analysts at the level of nation states. Terrorist and insurgent movements have also been largely anchored in nationalist and ethnic power bases even when they have sought to mobilise a transnational ideological appeal on religious or class grounds. There have been a few exceptions to this pattern such as the alliance between the German Baader-Meinhof group and the Japanese Red Army Faction, but even such international alliances as this did not, until at least the 1980s, presage anything like a global terrorist network necessitating a global strategic response. This study examines terrorism and global strategic responses.