一种瞄星替代方法方案设计

角度零位一致是舰炮武器系统精确打击目标的前提和基础,鉴于传统瞄星方法的局限性,在舰艇系泊条件下,提出了一种新的瞄星替代方法,该方法选择合适的海上及岸上目标作为瞄准目标,运用相应的算法,可以完成舰炮武器系统角度零位的标定工作.该方法可以作为未来舰炮武器系统零位标定的一种备用方法和手段进行使用.     

The solution to an open problem for a caching game

In a caching game introduced by Alpern et al. (Alpern et al., Lecture notes in computer science (2010) 220–233) a Hider who can dig to a total fixed depth normalized to 1 buries a fixed number of objects among n discrete locations. A Searcher who can dig to a total depth of h searches the locations with the aim of finding all of the hidden objects. If he does so, he wins, otherwise the Hider wins. This zero‐sum game is complicated to analyze even for small values of its parameters, and for the case of 2 hidden objects has been completely solved only when the game is played in up to 3 locations. For some values of h the solution of the game with 2 objects hidden in 4 locations is known, but the solution in the remaining cases was an open question recently highlighted by Fokkink et al. (Fokkink et al., Search theory: A game theoretic perspective (2014) 85–104). Here we solve the remaining cases of the game with 2 objects hidden in 4 locations. We also give some more general results for the game, in particular using a geometrical argument to show that when there are 2 objects hidden in n locations and n→∞, the value of the game is asymptotically equal to h/n for h≥n/2. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 23–31, 2016     

基于新型非易失内存的远程零拷贝文件系统

为提升物联网与边缘计算应用中前端节点间的数据访问效率,提出了一种新型远程零拷贝文件系统。该文件系统无须借助特殊硬件,可直接基于通用网卡设备实现零拷贝的数据传输框架;充分利用新型非易失内存的随机访问特性,尽可能减少数据缓存和拷贝,提高数据访问的吞吐量。建立缓冲区池,精简并融合传统网络栈和存储栈,从而缩短文件访问路径,减少软件冗余,降低数据访问延迟。最终提供高带宽、低延迟的远程数据访问性能。测试结果表明,远程零拷贝文件系统比传统网络文件系统减少了42.26%～99.19%的读写延迟,细粒度访问下的吞吐量最高可提升1297倍,显著降低了处理器开销和缓存失效次数。     

星地非理想通道下的导航信号测距偏差分析

针对广义信道下伪码测距偏差与各部分通道测距偏差叠加值的等效性问题,研究星地叠加通道和部分通道特性对伪码测距偏差的影响,并对实际通道中伪距"分层"现象的成因展开分析。通道非理想特性会对导航信号伪码跟踪性能产生影响,综合考虑星地两端通道的非理想特性,通过对导航信号伪码跟踪函数和不同类型通道建模,研究了星地叠加通道和部分通道特性对伪码测距偏差的影响。结合几类典型星地非理想通道,利用软件接收机展开仿真验证。通过分析几类典型通道对伪码测距偏差的影响,解释了零基线双差观测量中伪距"分层"现象的成因。文中模型与相关分析方法可用于解释相关信号质量问题,并指导接收机通道的最优化设计。     

激光陀螺捷联惯导系统元件误差自标定技术

通过设计一种实用的激光陀螺捷联惯性导航系统自标定算法,保证在外场使用情况下,能对惯性器件误差(三个陀螺漂移和三个加速度计零位)进行精确标定,确保系统长期使用精度.在完成算法设计的基础上,进行了仿真计算,取得满意的仿真结果.     

消防执法引入零容忍政策探析

为了更好地打击消防违法、整治火灾隐患、维护公共安全,探索在消防执法中引入零容忍政策。介绍了零容忍政策的由来及理论依据,分析了消防执法引入零容忍政策的必要性,探讨了实施零容忍打击消防违法、消除火灾隐患的具体意见。     

一种简单的直接数字式空间矢量PWM实现方法

针对常规SVPWM实现困难的缺点,根据零序信号注入方法以及“伏 秒”平衡原理,提出了一种新的SVPWM实现方法,利用这种方法可以直接获得逆变器开关触发时刻,因此可以减小运算器执行周期,提高计算速度.用该方法实现了永磁同步电动机的磁场定向矢量控制,并进行了仿真和实验研究,证明了新方法的正确性和优越性.     

捷联惯导惯性系对准误差分析

针对捷联惯导晃动基座下惯性系粗对准两种不同的计算方法,分析了由陀螺常值漂移和加速度计零偏引起的漂移误差（即平台失准角）、刻度误差和歪斜误差,并推导了这些误差项与惯性元件误差之间关系的解析表达式。结果表明：两种惯性系对准算法的平台失准角具有相同的极限精度,并且与传统解析对准法的精度一致;惯性系对准法的歪斜误差很小可以忽略,但需对姿态阵正交化以消除刻度误差的影响。     

Past failures and future problems: the psychology of irregular war

Personal cognitive processes inform how individuals understand their environment. Cultural variation, fundamental attribution error, causal attribution, and durability bias create obstacles to Western understanding of irregular war and have created a significant institutional bias in how the US military perceives its enemies- a perception only somewhat softened after a decade of irregular war. United Special Operations Command (USSOCOM) is in a better position to overcome these problems through persistent engagement. In the event of major conflict, environmentally sensitized military planners will be better able to achieve military and policy objectives.     

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Banning Weapons of Mass Destruction, by Frederick N. Mattis. Praeger Security International, 2009. 129 pages, $39.95.