用数字散斑干涉法测量动态面内位移场

利用数字散斑干涉法,研究了半无限平面模型在受冲击载荷下的面内位移场的测试技术。采用瞬态图像采集系统,将模型受冲击前后的电子散班图像直接存储在图像采集系统中,通过数字处理实现数字散斑干涉,测得了模型的面内位移。数值计算结果与实验两者能很好地吻合。     

单片集成传输线——共面耦合线、共面耦合带线及矩形微屏蔽的共面耦合线的新研究

本文首次提出将一些新型的微加工共面传输线用于ＭＭＩＣ设计。这些共面传输线分别是共面耦合线（ＣＣＬ）、共面耦合带线（ＣＣＳ）、矩形微屏蔽共面耦合线（ＲＭＣＣＬ）、共面耦合矩形微屏蔽线（ＣＣＲＭＬ）。推导出用于计算这些传输线的ＴＥＭ参数的解析公式,其推导方法为基于ＴＥＭ模假设,用精确的保用变换。数字结果显示了各种共面耦合传输线的性质。     

点数任意时的快速插值算法

本文建立了运算量级为O(nlog_2m) 的多项式快速除法(其中,m,n分别为除式与被除式的多项式次数),把点数n+1为2的幂次的多项式快速插值推广到n+1为任意数情形,提出了运算量级为O (n log_2~2n) 的快速插值算法。     

基于小波分析对网络协议指纹识别的研究

小波分析是当前信号、信息获取与处理领域(尤其是故障诊断分析与检测技术)中一个十分活跃且迅速发展的新领域,是当今国际研究热点,它同时具有理论深刻和应用十分广泛的双重意义。基于小波分析对网络协议进行指纹识别研究,利用小波变换把原始信号分解成多频段的信号,对信号进行塔式分解,通过计算处理每一层取得所有的有关Wi信息,提取指纹特征信息,并提出了检测方法和指纹识别系统的体系结构,对解决当今日益突出的网络安全问题进行有益尝试。     

大孔径泄漏水力瞬变模拟研究

通过研究大孔径泄漏时管道流量和压头的变化特性,根据水力瞬变的数学模型,利用VB软件编写程序,对大孔径泄漏时,泄漏点以及泄漏点前后不同节点的压力和流量变化进行模拟计算,绘制相关的水力瞬变压头曲线,从而为准确定位泄漏点的理论研究打下基础。     

小波理论的单脉冲雷达目标RCS特性测量

随着现代信号处理技术的发展,对非平稳信号分析和处理的小波分析技术已成功应用于雷达目标特性分析领域,大功率单脉冲雷达作为我国航天测控网当中的主干设备,具有一定的目标特性识别能力。主要针对目前靶场的现有装备,讨论了基于小波理论的单脉冲雷达空间目标RCS特性测量,并对窄带低分辨率雷达在未来空间目标识别中发挥其作用谈了作者的看法。     

Bureaucracy Does Its Thing: US Performance and the Institutional Dimension of Strategy in Afghanistan

It is not too soon to draw cautionary lessons from the inconclusive results of US performance during more than 11 years of Operation ‘Enduring Freedom’ in Afghanistan. As in Vietnam, fundamental difficulties persist in adapting enduring institutions to the requirements of strategy. At the heart of the matter is tension between the assumptions that underlie counterinsurgency as practiced in Afghanistan and organization of the US Armed Forces, State Department, and Agency for International Development. Knowledge of basic principles and necessary changes is available to answer the question, could the US have done better?     

Global counterinsurgency and US army expansion: the case for recruiting foreign troops

Given the nature of global counterinsurgency operations, the demands of military expansion, and the need for cultural, linguistic, and regional expertise, the United States Army should evaluate the establishment of US-led foreign troop units for its evolving force structure. This article proposes the creation of an American foreign legion based upon the recruitment of US-led, ethnically homogeneous tribal force units to meet the grist mill of counterinsurgency operations. This structured approach would be more beneficial than the current reliance on a de facto American Foreign Legion, represented by private military contractors (PMCs), many of them comprised of foreigners. These PMCs carry a number of oversight, accountability, and legal risks not found in a fully integrated, and US-officered foreign legion. The British Brigade of Gurkhas, the South-West African Police Counter-Insurgency Unit (Koevoet), and the Kit Carson Scouts serve as relevant historical examples where foreign troops were used to supplement national manpower resources.     

Counterinsurgency force ratio: strategic utility or nominal necessity

As a consequence of intervention in Iraq and Afghanistan, force ratio for counterinsurgency (COIN) has come under increased scrutiny. Reduced to its essence, the issue is simply, ‘How many troops does it take to get the job done?’ This answer has been sought by the US military, academia, and think tanks. There have been numerous responses, culminating in several ‘plug-and-play’ equations for minimum force ratios in COIN operations. Due to the impossibility of determining precisely how many insurgent forces there are, it has become common to base force ratios on the population of the country. In the realm of policy, the question above is posed as, ‘How many of our troops does it take to get the job done?’     

基于插件技术的人工免疫智能空间优化平台研究

采用人工智能方法求解空间优化问题已成为当前地理学研究领域的热点之一。研究目的在于通过设计一个开放的、可扩展的人工免疫空间优化模型框架,开发基于插件技术的优化工具软件,丰富空间优化决策支持的方法和技术体系。研究从空间优化问题的基本特点和计算需求出发,定义了面向空间优化问题求解的克隆选择优化模型框架。在此基础上,采用"插件-宿主平台"结构设计了人工免疫智能空间优化平台的总体架构,定义免疫算子插件与空间优化问题应用插件开发机制。实验结果表明,平台的架构和功能设计充分考虑了计算平台的开放性和扩展性,通过平台标准接口的功能扩展可实现对不同类型空间优化问题的求解。空间优化问题研究者或政府决策部门无需关系人工免疫优化方法的具体内涵即可基于本平台完成其具体空间优化决策支持任务。