天线阵载波相位双差的欺骗干扰检测技术

针对采用单一发射天线的导航信号欺骗干扰,研究了基于天线阵载波相位双差的欺骗干扰检测技术,采用代数方法证明了三元非线阵是进行导航信号到达角无模糊解算的最少阵元数和阵型要求,并以相应阵型为基础,提出了基于天线阵载波相位双差的欺骗干扰检测量构造方法,给出了检测性能的分析方法,定义了用于限制检测性能下降的最小检测门限。采用蒙特卡洛方法对所提检测方法的检测性能进行了仿真,结果验证了理论分析的正确性。     

数字图像处理的“炮身轴线偏移”检测系统设计与实现

通过解决基于数字图像处理的环境光自适应技术、激光成像自拟合技术、分辨率自适应技术等关键技术,设计并实现"炮身轴线偏移"检测系统,提高了"炮身轴线偏移量"检测效率。经实验验证,该检测系统误差符合检测要求,且具有结构简单、操作简便、精度较高的优点,是可行的。     

舰炮火控雷达实测误差时序特性分析建模

针对舰炮火控雷达高精度实时仿真建模的问题,运用高斯分布和正态平稳过程的两种误差序列生成方法,建立火控雷达简化仿真模型。通过对某火控雷达实测数据误差的统计及时序相关性分析,完成误差序列仿真生成与验证,给出了实现舰炮火控雷达探测误差仿真的优选方法。实践证明,正态平稳模型的误差生成方法可以有效满足新型舰炮仿真试验火控雷达建模要求。     

装备技术体系网络建模与结构优化方法

针对装备技术发展管理的重用度和冗余度问题,研究了体系网络建模与结构优化方法。将装备技术抽象为节点,技术关系抽象为边,提出了基于装备技术描述属性框架和技术关系分析的体系网络建模方法;将3种经典的网络社团探测方法应用于装备技术聚类,通过比较评估指标,生成了技术聚类优化方案;基于加权网络中心度算法,识别了对体系冗余影响最大的装备技术。以包含235项激光武器装备技术的技术体系为例,验证了方法的有效性,总结了体系结构的优化结论。     

远程复杂通信电磁环境模拟器的设计与实现

通信电磁环境模拟器是保障完成通信对抗装备检测与训练的重要设备。提出了一种基于任意波形发生器和嵌入式GPRS/GPS模块的远程模拟器设计方案。同时,讨论了一种模拟器的组网拓扑设计,实现了复杂信号环境生成。解决了远程通信电磁环境生成问题,具有很高的工程应用价值。     

巨磁阻传感器在齿轮精细检测中的应用

提出一种利用巨磁阻传感器进行齿轮精细检测的方法,介绍该方法的检测原理和系统组成,从可分辨最小磁场、时间响应和温度特性3个方面分析应用巨磁阻传感器的可行性和有效性,并通过实例测量实现对齿轮的磨损、点蚀等故障的有效检测与诊断.     

An assessment of the ‘democratic’ coup theory

The Egyptian military's unconstitutional removal of President Mohamed Morsi has reignited a debate regarding the theory of the ‘democratic coup’. Though coups are almost invariably condemned, many political observers and a few scholars have recently argued that coups can act as catalysts for democratisation. This paper empirically assesses the democratic coup hypothesis for Africa. Multivariate analyses from 1952 to 2012 suggest that coups statistically improve a country's democratisation prospects. Extensions of the model show that coups appear to be likely precursors for democratisation in staunchly authoritarian regimes and have become less likely to end democracy over time, and that their positive influence has strengthened since the end of the Cold War. As of 2012, countries that have experienced a recent coup are expected to be four times more likely to witness a democratic transition than those that have remained coup-free.     

NATO AS AN EXTERNAL DRIVER OF INSTITUTIONAL CHANGE IN POST‐COMMUNIST COUNTRIES

So far, economic analyses of NATO enlargement have been restricted to aspects of regional security while political analyses focused on indirect peace‐building effects on democracy in the first place. Our panel regressions for 25 post‐communist countries for the period from 1996 to 2008 reveal that direct incentives provided by NATO pre‐accession are important for broad‐based institutional development. Results are even more robust than for variables measuring EU pre‐accession or NATO membership effects. This supports the argument that NATO can act as a transformative power and should strengthen its political agenda.     

水面光电探测技术研究进展分析与展望

文章围绕水面光电探测技术,对该技术的内涵特点、适用范围以及主要用途进行了概括介绍．对近些年来国外在水面光电探测技术方面的发展进行了梳理,分析列举了光电探测技术发展的若干趋势,并分析了目前国内外技术间存在的差距,最后对发展我军水面光电探测技术值得重点关注的研究方向进行了分析并提出了自己的建议。     

Virtual War in the Ice Jungle: ‘We don't know how to do this’

The Cold War at sea expanded in many realms, including the frigid and treacherous waters of the Arctic Ocean. The US Navy pioneered these efforts with the visit of USS Nautilus to the North Pole in 1958. During the latter stages of the Cold War, however, Soviet naval strategists began to conceptualize the polar ice cap as a strategic asset for cloaking the operations of its nuclear missile submarines. As under-ice operations afforded the Soviet submarine fleet advantages of stealth, proximity to target and tighter lines of communications, both navies were forced to try to develop tactics for combat under these extremely complex and arduous conditions.