空地多目标序贯攻击三维最优航迹实现

单机或多机协同执行对地多目标攻击任务将成为未来空地战争的一种重要形式。制定了合适的分段规划策略,建立了水平面和垂直面的空地多目标序贯攻击最优航迹模型,应用经典的可行方向法对模型求解。根据水平面和垂直面规划的相互关系及规划结果,得到三维最优航迹,为飞行导航提供有效依据。最后通过实例验证了所建模型及方法的有效性。     

基于云理论的坦克分队进攻队形综合评价

对坦克分队进攻队形的评价在坦克兵战术研究领域具有重要的意义.依据战术规则制定出了评价进攻队形的指标体系,运用AHP法给出了各指标的权重.在综合评价中引入了云理论,制定了各指标的云模型参数确定方法,运用虚拟云算法对各指标进行综合运算,最后将评价结果以云数字特征图以及概率分布的形式分别表示出来.经实例验证,该方法科学合理,...     

Warning of Terror: Explaining the Failure of Intelligence Against Terrorism

Many scholars and analysts have studied intelligence failure and surprise and developed theories to explain disasters such as the attack on Pearl Harbor. Others, especially since the 9/11 attacks, have examined the rising threat of terrorism and see it as posing a particularly difficult challenge for the intelligence community. But little work has been done to integrate the earlier literature on intelligence failure with the newer threat of terrorist attack. This article attempts such an integration, by examining the bombing of the US Marine Barracks in Beirut in 1983; it concludes that most studies of the Beirut bombing are mistaken in their assessment of the role played by intelligence in that disaster, and suggests that our understanding of intelligence failure against surprise attacks needs to be revised in the age of terrorism.     

基于跳数的节点安全定位算法研究与分析

通过对无线传感器网络节点安全定位技术的研究和分析,采用基于跳数的节点定位算法思想获取定位参照信息,提出了一种与硬件无关的基于跳数的节点安全定位算法——HOP-GDSL,该算法用设计的信标节点信息传递协议提供包的认证、保护跳数信息,用现有的锚节点检测虫洞攻击.经仿真实验证明,该算法能有效抵抗恶意节点攻击,实现节点正常定位,并对虫洞攻击有较高的检测率.     

基于无线局域网MAC层DOS攻击的入侵检测

为了检测无线局域网MAC层的6种DOS攻击方式,提出一种基于Hybrid特征选择和支持向量机的入侵检测算法.该算法先用混合器模式的Hybrid特征选择算法提取8个识别攻击的流量统计特征,然后利用支持向量机对待检测对象进行识别分类.通过建立仿真环境对检测模型的检测效果进行统计验证,表明检测模型在具有较高检测准确率和较低的虚警率,能够有效地检测MAC层DOS攻击,具有实用价值.     

基于微分对策的潜艇鱼雷攻击占位问题研究

针对潜艇鱼雷攻击占位问题,建立占位方案分析和优化的微分对策模型,采用影子目标法对问题进行简化。证明了在给定规避速度大小的条件下,潜艇最佳规避策略为直线运动。于是利用定性微分对策理论,给出潜艇可占领攻击阵位条件。以占位时间最短为优化目标,建立可占位情形下的占位方案优化模型,即可占位情形下的最短时间占位方案计算模型,给出最短时间占位方案解析计算公式。     

最优线性分派模型的水面舰艇破交方案优选

水面舰艇破交方案是由指挥机关根据辅助指挥决策系统提供的敌情判断和应采取的对策拟制形成的,由于问题本身的复杂性,在进行方案优选时,其模糊性、不确定性较强.在综合分析了水面舰艇破交方案指标的基础上,考虑到了"成本型"和"效益型"指标间的不可公度性及矛盾性.对待选方案按其对正理想解和负理想解的贴近度进行排序,求出各方案的排序频数,将其转化为最优线性分派模型进行优化,从而使所有方案得到总体最优排序.     

激光制导航空炸弹攻击区仿真计算

针对某型激光制导航空炸弹,进行了典型条件下的攻击区仿真计算,得出了几点结论。研究的方法和结论,可供研究激光制导武器参考,为进一步研究其它条件下投放激光制导武器的攻击区打下基础。     

Evasion policies for a vessel being chased by pirate skiffs

Piracy attack is a serious safety problem for maritime transport worldwide. Whilst various strategic actions can be taken, such as rerouting vessels and strengthening navy patrols, this still cannot completely eliminate the possibility of a piracy attack. It is therefore important for a commercial vessel to be equipped with operational solutions in case of piracy attacks. In particular, the choice of a direction for rapidly fleeing is a critical decision for the vessel. In this article, we formulate such a problem as a nonlinear optimal control problem. We consider various policies, such as maintaining a straight direction or making turns, develop algorithms to optimize the policies, and derive conditions under which these policies are effective and safe. Our work can be used as a real‐time decision making tool that enables a vessel master to evaluate different scenarios and quickly make decisions.