国防工程智能信息系统效能评估研究

在简要介绍国防工程智能信息系统组成和功能的基础上,提出了系统效能评估指标体系,分别用BP神经网络和AHP法建立了国防工程智能信息系统效能评估模型,并对系统的设备监控管理能力进行了评估。仿真结果表明,BP神经网络法克服了传统评估方法精度低、模型复杂和计算量大的缺点,可将以往的专家经验知识进行分析学习,能够实现实时方便的在线评估;AHP法对多层次的指标体系具有较强的处理能力,但是存在指标权重确定主观性强,计算量大的问题。     

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。     

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.     

China's Naval Ambitions in the Indian Ocean

This article argues that an increasingly sea-power-minded China will neither shelter passively in coastal waters, nor throw itself into competition with the United States in the Pacific Ocean. Rather, Beijing will direct its energies toward South and Southeast Asia, where supplies of oil, natural gas, and other commodities critical to China's economic development must pass. There China will encounter an equally sea-power-minded India that enjoys marked geostrategic advantages. Beijing will likely content itself with ‘soft power’ diplomacy in these regions until it can settle the dispute with Taiwan, freeing up resources for maritime endeavors farther from China's coasts.     

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.     

ANGOLAN DEADLOCK

Children on the African continent have suffered immensely from the proliferation and misuse of small arms, including death, injury, displacement, separation from families, loss of access to health, humanitarian and educational services, and lack of economic opportunities. Further, over 300,000 children serve as child soldiers, relying on small arms as their tools of war. The international community has worked to establish protections for children for over 50 years, yet children continue to suffer. The recent UN Special Session on Children adopted ‘A world fit for children’, which, in combination with the Programme of Action agreed upon at the July 2001 UN Conference on Small Arms, begins to address a comprehensive approach to eliminating the negative impacts of small arms proliferation on children in conflict.     

基于地理信息系统检索的可视化方法

文章主要对地理信息系统中检索功能的基本涵义和研究现状进行了介绍,根据地理信息系统中检索功能实现的基本流程．着重阐述了检索过程中常用的可视化方法。最后对检索效果的评价标准以及目前面临的主要问题进行了介绍．为相关系统的设计与开发提供了一定的参考。