航电仿真系统中RS422总线监控软件的设计

针对航电仿真系统总线监控软件专用性强的特点和重复开发多、欠缺标准开发流程的问题,为了提高航电仿真系统的开发效率,根据实际需求提出一种以RS422总线为数据传输通道的总线监控软件的设计方案。该方案采用分层开放式架构,结合面向对象与模块化设计思想,在一定限度内增强了软件的可扩展性与可重用性。在某型号航电仿真系统中的应用表明,以此方案设计的总线监控软件满足航电系统仿真的各项技术指标及用户需求能够有效辅助航电仿真系统的设计与开发。     

略论大学“概论”课教学如何总结和提炼知识内容

笔者在“概论”课教学中运用总结和提炼的方法,把“概论”的理论知识归纳为几个简单的字或一句话,以方便学生理解和记忆,提高教学效果。强调对领袖人物原著的学习和领悟,感受领袖人物的人格魅力。教学中总结和提炼时要注意紧贴课本知识和学生的实际,帮助学生解决一些困惑问题。     

案例教学法在《火灾证据学》课程中的运用研究

为了培养学员的综合素质和创新能力,《火灾证据学》课程引入了案例教学法。分析《火灾证据学》课程运用案例教学法的教学效果,提出运用案例教学法的基本形式及其相关要求。     

涵咏书海 熏陶性情——从剖析初中学生不良阅读心理谈初中语文阅读教学

学生语文素养的提高,关键在于学生平时的积累,而积累的主要渠道是阅读。本文试图从当今中学生的不良阅读现象谈起,分析其不良的阅读心理。根据中学生的不良阅读心理,本文从指导阅读的教师、阅读的材料、阅读的教学方法三方面提出了合理化建议,肯定阅读在中学语文教学中的地位。     

基于多 Agent 系统的分队对抗建模仿真

使用基于多Agent系统的建模方法对分队对抗进行了“自底向上”地建模;建立了战场的模型,并从属性、行为、规则三方面建立了智能兵力Agent模型;基于多Agent仿真平台——NetLogo,构建了仿真系统,通过对Agent“微观”行为的仿真,获得了群体的“宏观”行为,为战争复杂系统仿真研究提供了参考。     

基于相似系统理论的训练电磁环境逼真度评估

针对训练电磁环境逼真度评估这一技术难题,基于相似系统理论,浅谈了对训练电磁环境逼真度评估的基本认识和总体考虑,明确了训练电磁环境逼真度评估的基本步骤,提出了三种类型相似元关键特征比例系数的确定方法,结合实例简单演示了计算相似元值的基本过程。     

The Naval Intelligence Underpinnings of Reagan's Maritime Strategy

Washington's so-called Maritime Strategy, which sought to apply US naval might against Soviet vulnerabilities on its maritime flanks, came to full fruition during the 1980s. The strategy, which witnessed a major buildup of US naval forces and aggressive exercising in seas proximate to the USSR, also explicitly targeted Moscow”s strategic missile submarines with the aim of pressuring the Kremlin during crises or the early phases of global war. Relying on a variety of interviews and newly declassified documents, the authors assert that the Maritime Strategy represents one of the rare instances in history when intelligence helped lead a nation to completely revise its concept of military operations.     

Lessons learned: The Dutch ‘Stay-Behind’ organization 1945–1992

Right after World War II, two separate initiatives were taken in the Netherlands to establish a stay-behind organization – or, rather, two stay-behind organizations. Both initiatives were purely Dutch, and both groups, remnants from wartime Dutch intelligence and sabotage organizations, wanted to liaise exclusively with the British. Only later did the Americans become members of what then came to be known as the Tripartite Committee. After a period of about 15 years, during which the Chief of the General Staff loosely coordinated both organizations, known as O (for Operations) and I (for Intelligence), a crisis broke out. The question was whether the two organizations should be amalgamated or not. After much discussion it was decided to keep them separate, but more closely coordinated. The first coordinator of this new type, a non-military man, was appointed in 1967. From that moment on the Dutch stay-behind organization, under supervision of highly respected civilian authorities, was able to perfect its organizational structure. The introduction, during the 1980s, of new specially designed radio equipment made special wireless operators superfluous. This development made for a leaner and more efficient organization.

After the Berlin Wall had come down, and in the wake of the ‘Gladio’ affair in Italy, the Dutch stay-behind organization was dissolved.     

卫星双向与单向载波联合的北斗星载钟短稳评估方法

卫星导航系统评估星载钟稳定度通常需要大型地面监测网的观测数据和复杂的钟差确定算法,不能基于单站观测数据实现。论文在分析利用单站观测数据评估星载钟短稳方法的基础上,提出了一种相对容易实现的联合卫星双向载波测距值与GNSS单向载波观测值的星载钟短稳评估方法。该方法通过卫星双向载波测距确定星地几何距离,基于消除星地几何距离的GNSS接收机载波相位观测值估算卫星相对钟差,进而实现其短稳评估。利用北斗系统观测数据进行了有效性验证,并与复杂钟差确定算法以及利用平滑广播星历的方法(SBE法)进行了对比,本文方法与复杂钟差确定算法计算的结果相符,在1000s平滑间隔内与SBE法结果一致,相对误差小于10%,1000s以上好于SBE法。     

Investigating optimal replacement of aging air force systems

An availability‐oriented approach has been developed to decide when to replace an aging system. For an existing system, it is optimal to operate another year if and only if the incremental cost per available year is less than the lifetime average cost per available year of a new aircraft. We illustrate our approach using United States Air Force KC‐135 tanker data. In demonstrating our approach, we find it will be optimal to replace the KC‐135 by the end of the decade.