Whose Hearts and Whose Minds? The Curious Case of Global Counter-Insurgency

Traditionally regarded as a secondary activity in military thinking and practice, the notion of counter-insurgency (COIN) has undergone a remarkable renaissance. This analysis traces the origins of this renaissance to two distinctive schools: a neo-classical school and a global insurgency school. The global insurgency school critiques neo-classical thought and presents itself as a more sophisticated appreciation of current security problems. An examination of the evolution of these two schools of counter-insurgency reveals how the interplay between them ultimately leaves us with a confused and contradictory understanding of the phenomenon of insurgency and the policies and strategies necessary to combat it.     

基于蚁群算法的Costas跳频信号自测速方法

分析了速度对Costas跳频信号回波的影响,用波形熵作为性能指标函数,研究了基于蚁群算法的Costas跳频信号自测速方法,仿真验证表明,这种测速方法能够明显提高测速的精度.     

多平台雷达有源干扰资源分配算法

根据现代干扰机特点,建立"多对多"雷达有源干扰资源分配数学模型,结合分配算法的具体应用环境,提出了基于多Agent分布协同拍卖的雷达干扰资源分配算法,实例表明该方法可行。     

采用模糊控制的直流电机软启动及调速系统

介绍了以单片机为核心的直流电机软启动及调速系统,系统采用模糊控制策略,将转速偏差与偏差率模糊化并作为模糊控制器的输入量,根据所制定的模糊控制规则生成控制量。实验结果表明,该系统启动时间可以根据需要调整,具有良好的静态和动态性能。     

基于虚拟台架的变速箱箱体动态应力测试及影响因素分析

为了虚拟测试变速箱箱体结构的动态应力并分析其影响因素,利用虚拟样机技术建立了箱体虚拟振动试验台模型,通过虚拟试验测试箱体在振动激励下的动态应力,研究并分析了激励频率和幅值、螺栓连接刚度以及橡胶衬套刚度等因素对箱体动态应力的影响,结果表明箱体上橡胶衬套的刚度是影响其动态应力的最主要因素.     

A produce‐to‐stock system with advance demand information and secondary customers

We consider a manufacturer (i.e., a capacitated supplier) that produces to stock and has two classes of customers. The primary customer places orders at regular intervals of time for a random quantity, while the secondary customers request a single item at random times. At a predetermined time the manufacturer receives advance demand information regarding the order size of the primary customer. If the manufacturer is not able to fill the primary customer's demand, there is a penalty. On the other hand, serving the secondary customers results in additional profit; however, the manufacturer can refuse to serve the secondary customers in order to reserve inventory for the primary customer. We characterize the manufacturer's optimal production and stock reservation policies that maximize the manufacturer's discounted profit and the average profit per unit time. We show that these policies are threshold‐type policies, and these thresholds are monotone with respect to the primary customer's order size. Using a numerical study we provide insights into how the value of information is affected by the relative demand size of the primary and secondary customers. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

一种评价伪装目标雷达发现概率的方法

为简化描述脉冲积累数、雷达参数及目标后向散射截面与发现概率、虚警概率之间的关系,结合伪装效果检测情况,提出了一种评价目标伪装前后雷达发现概率的方法,即构建评价函数对上述关系进行特征逼近研究.结果表明,该评价函数能反映伪装前后目标RCS与背景RCS比值的变化规律,且计算过程简单,可用于雷达检测评估.     

一种轴承故障等级诊断改进方法

针对频谱分析不能确定轴承故障程度的缺点,提出 PCA（principle component analysis）与优化的 SVM （support vector machine）相结合的方法,研究轴承不同故障类型、同种故障类型不同故障等级的实验振动数据,同时对轴承振动信号的13个特征属性参数进行了主成分分析,确定了最优特征属性参数,并利用优化的SVM 对轴承故障进行诊断。实验结果表明：该方法确定了最优属性参数,减少了冗余信息,提高了诊断准确率,减少了时间消耗,不仅有效地诊断出了轴承的故障类别,而且实现了轴承的故障等级诊断,使诊断更加精细化,为工程实际中轴承的健康管理提供了有益参考。     

基于模态分析方法的管道导波频散曲线计算

推导了管道中导波传播的有限元方程,使用 ANSYS 有限元软件建立了管道模型;对导波进行模态分析,得到了管道模型的一系列特征频率与振型,通过对管道振型的模态识别,提取了管道中各模态导波的模态特征,计算得到了管道中导波的频散曲线,该曲线与解析法所得到的频散曲线相吻合。该方法可以应用于周期性重复组合的任何结构（如横截面固定的杆、板、管）中导波的频散曲线计算。     

卓越指挥人才实战化教学训练创新

卓越指挥人才培养是院校人才培养新的增长点。文章着眼卓越指挥人才的实战化训练,分析了军事教学训练体系的构成模块,提出了教学训练的内容拓展,并从教学条件建设、师资队伍交流和养成机制等方面提出了保障要求。