局部状态检测的GPS/INS组合导航转发式干扰检验方法

针对GPS/INS(Global Positioning System/Inertial Navigation System)组合导航中GPS转发式干扰问题,在分析故障变化特性与故障诊断函数特性之间关系的基础上,提出了一种基于局部状态χ2检验的方法。通过观测值的变化、观测模型的变化和χ2检验中x赞1k的变化论证了方法的可行性,并得出组合导航受到转发式干扰是判断系统发生故障的充分而非必要条件的结论。最后通过在仿真轨迹中加入诱偏来模拟转发式干扰,仿真实验证明该方法能够以较高的灵敏度和较高的准确性判断转发式干扰的发生。     

‘Full spectrum dominance’: Donald Rumsfeld,the Department of Defense,and US irregular warfare strategy, 2001–2008

This article examines the evolution of US irregular warfare (IW) doctrine and practice from 2001 onwards. It argues that, after 9/11, top-tier civilian policymakers in the US Department of Defense (DoD) and across the US government developed a heightened awareness of asymmetric threats and non-conventional forms of warfare, especially those shaped by contemporary globalisation. The result was a gradual turn towards irregular warfare, led by Rumsfeld and the DoD, designed to ensure ‘full spectrum dominance’ across all modes of conflict. This pre-dated the insurgency in Iraq and the promotion of counterinsurgency in the US Army by General David Petraeus and others. Policymakers' reluctance to acknowledge the insurgency in Iraq was not down to a failure to understand the concept of IW, but because they had viewed Iraq in conventional terms for so many years and were reluctant to admit their mistake.     

Introduction: Exploring the jungle of terminology

When twentieth-century authors wrote about ‘partisan warfare’, they usually meant an insurgency or asymmetric military operations conducted against a superior force by small bands of ideologically driven irregular fighters. By contrast, originally (i.e. before the French Revolution) ‘partisan’ in French, English, and German referred only to the leader of a detachment of special forces (party, partie, Parthey, détachement) which the major European powers used to conduct special operations alongside their regular forces. Such special operations were the classic definition of ‘small war’ (petite guerre) in the late seventeenth and in the eighteenth centuries. The Spanish word ‘la guerrilla’, meaning nothing other than ‘small war’, only acquired an association with rebellion with the Spanish War of Independence against Napoleon. Even after this, however, armies throughout the world have continued to employ special forces. In the late nineteenth century, their operations have still been referred to as prosecuting ‘la guerrilla’ or ‘small war’, which existed side by side with, and was often mixed with, ‘people's war’ or popular uprisings against hated regimes.     

论“汉—民兼通”双语教师的培养

本文主要论述了培养"汉—民兼通"的双语教师的必要性和"汉—民兼通"双语教师应具有的素质。并提出了几点培养措施:重视对少数民族语言的学习;把对少数民族文化的学习作为汉族双语教师的必备条件;建立严格、合理的教师资格认证制度与考核制度;完善对双语教师的激励制度。     

真实性语言实践活动对大学生外语交际策略和听说能力的影响

外语交际能力是社会所需高水平复合应用型人才应具备的素养。本研究考察真实性语言应用实践活动对非英语专业大学生外语交际策略和听说能力的影响。通过对比研究发现,学生参加了真实性语言应用实践活动后,其交际策略使用情况得到改善,更倾向于使用积极交际策略,消极策略的使用频率明显减少;听说水平整体得到提高;寻找机会说英语的主动性增强。因此,真实性语言应用实践活动有助于大学生提高外语交际能力,提高社会所需整体应用能力素养。     

基于动力学和扩散分段控制的Mg/H2O反应模型及数值分析

为了数值研究宽广温度范围内Mg/H2O的反应特性,分别建立了考虑部分MgO在液滴表面凝聚的Mg/H2O扩散燃烧模型和基于Arrhenius公式的Mg/H2O反应动力学模型.数值研究了Mg/H2O反应速率在扩散控制和化学动力学控制下随反应条件变化的规律.研究结果表明,Mg液滴扩散燃烧时间计算结果与文献值相符;提高温度和水...     

板级高速传输总线链路层关键技术研究与实现

随着高性能服务器和超大规模计算机的发展,系统设计者对板上高速互连总线的要求越来越高,如何使芯片间的数据传输延迟更小,提高计算通信比是需要解决的重要问题.论文研究了近年来发展迅速的超传输总线和PCI Express总线的链路层的特点,在此基础上提出了一种64位高速总线链路层体系结构,并对其关键技术进行了研究,设计实现了一...     

3维C/SiC-ZrC复合材料的制备及其性能研究

针对超高温环境应用需求,采用化学气相渗透工艺(CVI)与先驱体浸渍-裂解工艺(PIP)联用制备了3维碳纤维增强SiC-ZrC基复合材料(C/SiC-zrC),并研究了SiC含量对C/SiC-ZrC复合材料力学性能、抗氧化性能和抗烧蚀性能的影响.结果表明,随着SiC含量的增加,C/SiC-ZrC复合材料的强度逐渐降低,静...     

日语教学中的听力教学法

听力课在外语教学中占有主要地位。一直以来,外语教学遵循的＂听说读写译＂规律,更是将听力放在首位,这足以说明听力对外语学习者的重要性。现代语言教育理论高度重视听在语言学习和语言使用中的作用,听力教学受忽视和缺乏科学性的状况正在改变。结合多年教学实践,对如何提高听力教学效果,使学生在短期内提高听力能力做了初步的探讨。     

浅谈武警部队处置突发事件战斗动员的语言特色

在武警部队遂行处突任务时,战斗动员以其独有的语言特色发挥着激发官兵斗志、鼓舞部队士气、坚定战斗意志的作用。在撰写、实施战斗动员时,应掌握其要求,熟悉其内容,遵循其语言特点,更好地发挥战斗动员在遂行处突任务中的作用。