（2015卫星导航）基于双天线载波相位差的卫星导航接收机抗欺骗技术研究

针对欺骗干扰信号难以有效实时模拟真实卫星信号空间分布特性的特点,本文提出了利用双天线载波相位差进行欺骗信号检测的方法。在已知接收机天线阵基线以及姿态条件下,同一路信号在两副天线上表现出的相位差与天线基线长度与信号入射相关。而信号入射角是空间信号的物理传播特性,欺骗干扰源无法通过数字方式改变。以通过卫星星历获取所跟踪卫星的精确位置为先验信息,即可确定真实信号在已知天线阵上的载波相位差,从而实现对欺骗信号的有效检测。本文分析了载波相位差计算的各种误差源,并在此基础上建立了针对欺骗信号的二元假设检验。最后,通过理论分析和仿真实验,验证了本文提出的欺骗信号检测技术的有效性,并得出了天线阵基线越长、入射方位角越小,载波相位差检测技术对欺骗信号的检测性能越优的结论。     

采用双天线载波相位差技术的卫星导航接收机抗欺骗方法

针对欺骗干扰信号难以有效实时模拟真实卫星信号空间分布特性的特点,提出利用双天线载波相位差进行欺骗信号检测的方法。分析载波相位差计算的各种误差源,并在此基础上建立针对欺骗信号的二元假设检验。通过理论分析和仿真实验,验证了所提欺骗信号检测技术的有效性,并得出了天线阵基线越长、入射方位角越小,载波相位差检测技术对欺骗信号的检测性能越优的结论。     

卫星中断容忍网络路由算法研究

针对卫星网络易中断、长时延等问题,提出一种适合卫星DTN网络的路由算法——SDTNR算法。该算法在节点缓存中设置了3个存放不同服务等级报文的队列,队列根据报文响应比排序,响应比小的报文优先发送。SDTNR算法根据卫星运行规律,建立节点选择表并实时更新该表,根据表中信息选择满足条件的节点作为下一跳节点,以此保证通信的可靠性。仿真结果表明,SDTNR与EPR、PR、FC 3种算法相比,SDTNR更好地提高了报文的投递率、降低了网络开销和平均时延。     

基于战备完好率的军用飞机维修费用需求确定方法

军用飞机维修费用需求与战备完好率要求密切相关,为保持飞机一定的战备完好率水平,必须投入一定的维修费用。维修费用投入多,则维修设备齐全,维修人员维修能力高,维修备件充足,飞机故障修复时间短,战备完好率高;维修费用投入少,会造成维修设备短缺,设施破旧,维修人员培训不到位,维修备件供应不足等各种问题,直接影响战备完好率水平。     

Transforming the Spanish military

The article analyses the Spanish military transformation. This process started in 2004 as a means to adapt the force structure, organization and capabilities of the Spanish military to meet present and future threats in compliance with NATO’s initiatives, thus ensuring the continuity of the equipment modernization, professionalization and the adjustment of the country’s defence architecture to the post-cold war environment. A decade later, although transformation is still a priority for the Ministry of Defence, limited political will, a lack of strategic guidance, poor resource management and the effects of the economic crisis are compromising its development. This article describes the Spanish military transformation and assesses its value in adapting the country’s armed forces to the current and prospective security environment.     

Country survey: Angola

This paper is a survey of Angola’s defence sector and policy from 1992, the year the civil war ended, to 2012. Angola achieved its independence upon the Popular Movement for the Liberation of Angola (MPLA) defeating National Union for the Total Independence of Angola. Since then, fuelled by its rich natural resources, the country has grown steadily. The MPLA military forces were a central factor behind independence and maintain their central role to this day. Moreover, Angola’s support for African peace with monitoring military missions is a clear indication that the country aims to intervene in African security and military issues, with its military capabilities funded by oil revenues.     

推进舰队舰船装备保障军民融合深度发展

文章就推动装备保障军民融合深度发展,提出应正确把握和领会其基本内涵,客观分析其发展现状,着力解决制约装备保障军民融合深度发展的深层次矛盾和问题,并从创新体制机制、构建管理系统、健全法规标准三方面提出了相关的对策思考。     

军事仿真训练系统体系架构改进研究

现有军事仿真训练系统多基于传统C／S架构进行体系设计,在大规模战术训练仿真部署时,存在并发访问能力弱、可靠性差等问题。通过对仿真系统的体系架构进行研究,结合云计算技术提出增加访问控制服务器、仿真数据共享服务器以及仿真引擎虚拟化等改进方式,并通过对比分析,总结了三种方式对仿真训练系统的可扩展性、并发访问性以及数据可靠性等方面能力优化和提升的异同,并提出仿真训练系统传统体系向云计算体系逐步过渡的思路。     

The causes of trust and distrust in the military

Trust in institutions is an important issue of political science and sociology. This article contributes to the discussion by exploring public trust in the military at the global, regional and national levels, and the causes of trust and distrust in the military. Analyses of public opinion data reveal that the military is a highly trusted social institution across the world. In Slovenia, the trust in the military is high as well; however, it is lower than international data would suggest, averaging at 50%. Against this background, the article focuses on the causes of trust. The original empirical survey was accomplished and shows that the most significant causes of a high level of trust in the military are its frequent and successful involvement in disaster relief, its professional qualifications and high performance, as well as its national defense role. Whereas the key causes of distrust are: the poor levels of transparency in its procurement process; the politicization of the military and organizational problems.     

Accreditation Fraud in Brazilian Military Hospitals: Why “Tone at the Top” Matters

This article shows under which circumstances fraudulent accreditation can occur in Brazilian military hospitals, calling attention to the tone at the top as a critical aspect of military fraud deterrence – and hence as a critical aspect of this branch of military ethics. The problems allegedly found in Brazilian military health institutions were revealed through in-depth interviews conducted with 29 professionals who reported to work or have worked in a Brazilian military hospital. These fraud allegations were mostly associated with false documentation and procedures designed to give the appearance that legal requirements for accreditation were met and could be traced back to a weak or corrupt “tone at the top” coming from military higher ranks.