基于时滞的现代空防对抗兰彻斯特方程模型

针对现代战争中空防对抗过程的复杂,分析了现代作战条件下空袭与防空作战的主要特点,建立了基于时滞的现代空防对抗兰彻斯特方程模型,给出了该模型参数的求取方法,并进行了算例仿真分析,得到了有价值的仿真结果,为现代空防与防空作战提供了指导。     

Basic scheduling problems with raw material constraints

One of the achievements of scheduling theory is its contribution to practical applications in industrial settings. In particular, taking finiteness of the available production capacity explicitly into account, has been a major improvement of standard practice. Availability of raw materials, however, which is another important constraint in practice, has been largely disregarded in scheduling theory. This paper considers basic models for scheduling problems in contemporary manufacturing settings where raw material availability is of critical importance. We explore single scheduling machine problems, mostly with unit or all equal processing times, and L_max and C_max objectives. We present polynomial time algorithms, complexity and approximation results, and computational experiments. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005.     

一种新的对潜应召搜索法及其效能分析

论述了一种新的对潜应召搜索法 ,并对其效能进行了分析 ,同时就平均发现概率、搜索时间、转向次数三个指标与海军现在使用的扩展方阵搜索法进行了仿真比较     

一类不匹配不确定非线性系统鲁棒变结构控制

针对一类具有不匹配非参数化不确定性的非线性系统 ,设计出一种鲁棒变结构控制器。该控制器能够保证当时间 t趋于无穷时 ,闭环控制系统的输出跟踪误差趋于零。仿真实例说明了该控制器具有满意的控制效果     

多重结构神经网络在平台罗经故障诊断中的应用

提出了基于层次分类诊断模型的多重结构神经网络 (MNN)在平台罗经故障诊断中的应用方法 ,并对其温控子系统的人工神经网络 (ANN)进行了Matlab实现     

微波反馈调制型虚阴极振荡器的粒子模拟

用三维全电磁PIC方法对一种利用反馈微波信号调制入射电子束的新型虚阴极振荡器进行了粒子模拟研究。在外加450kV电压的自洽发射状态下,得到的微波峰值输出功率可达数百兆瓦,微波主频位于C波段,瞬时峰值效率≥5％,主模式为TE10模,与试验结果符合较好。     

柱锥级联型爆磁压缩发生器的实验研究

研究了柱锥级联型爆磁压缩发生器。给出了主要实验结果。发生器的负载是3.5μH,最大电流是55.8KA,上升前沿是14.3μs,电压为30.5KV。平均电流放大倍数是6.4。     

红外脉冲强光辐射产生技术研究

定向红外脉冲强光辐射技术是定向红外对抗中的关键技术,主要用来破坏敌方精确制导武器或C4I系统的红外传感器。本文进行了三种产生技术的研究,即爆炸激励惰性气体,多丝电爆激励惰性气体和多点同步爆燃药物。在同步爆燃产生技术的研究中,当有效载荷弹药为0.2kg时,在距离源50m处得到三个波段(1～3、3～5、8～12μm)的辐射强度为(2.00～3.55)×l05W／Sr,脉冲半高宽为约20ms的强红外辐射脉冲。     

Youth Between State and Rebel (Dis)Orders: Contesting Legitimacy from Below in Sub-Sahara Africa

Abstract

The Sahel has gained attention in international politics as one of the central theatres in the war on terrorism. International actors in this war seek alliances with states in the region, reinforcing the latter’s military strength and their legitimacy from outside. At the same time, increasingly-connected young populations question the legitimacy of their states, and contest that legitimacy from within and below. In the absence of states delivering any reasonable form of social contract, young people become torn between different governing orders and find themselves in a liminal space. In this article we present the cases of youth in Mali and Chad, who find themselves in a period of re-definition of their position in society and hence search for legitimate structures representation. In this search they may frame their belonging in terms of ethnicity, religion or political opposition – and increasingly also in adherence to global citizenship. New information flows and connectivity among young people in these regions, and between them and the diaspora, has given a new turn to their search for citizenship/belonging and rightful representation. However, whether their search will be successful in this geopolitical context is questionable.     

基于椭球模型的雷达/ESM联合定位算法

为了减少作战过程中雷达的开机时间,采用了ESM辅助的方法。在雷达关机条件下,利用多平台ESM对目标进行定位;当雷达开机时,采用雷达/ESM联合定位。本文首先分析了基于椭球模型的多平台ESM交叉定位算法,其次分析了雷达/ESM联合定位算法。通过仿真实验分析,这两种算法具有很高的定位精度;并分析了测量误差对定位精度的影响。该算法具有一定的应用价值