战场信息分发服务语义描述方法的分析与比较

文章针对基于语义的战场信息分发这一特定应用,对OWL-S和SAWSDL两种常用的语义服务描述语言进行了深入的比较与分析。首先,以航迹信息为例构建了战场态势信息本体,并对战场传感器所提供的服务进行封装;然后,详细描述了如何采用OWL-S和SAWSDL描述本体及服务,并结合战场态势语义的特殊需求,对两种语言的描述能力、匹配组合的支持能力等性能进行了比较。分析表明OWL-S更适合于复杂多变的战场信息环境。     

基于SOA的战场武器协同系统服务语义描述

高效的武器协同能充分发挥各作战单元的整体作战效能。SOA(Service Oriented Architecture)体系结构松耦合性、平台独立性及可重用性等特点,为武器协同系统的实现提供了有效的技术途径。文章针对现行集中式的武器协同系统体系结构,重点讨论了武器协同本体构建及战场服务语义描述的实现问题。首先介绍了武器协同系统的组成及工作流程;然后依据系统的操作过程,构建了完整一致的武器协同本体,并用OWL语言对其进行描述;分析、比较了几种服务描述语言优缺点,选择了WSDL-S语言进行服务描述,并以火炮射击服务为例,给出了战场服务的封装和描述方法,主要包括基本服务信息描述和服务描述的语义扩展。最后,对下一步工作进行了展望。     

非致命防暴动能弹作战效能评估

提出了非致命防暴动能弹作战效能的评估法,分析了非致命防暴动能弹的技术性能,建立了以非致命性为核心指标的防暴动能弹效能指标体系。采用定性分析与定量分析相结合,将集对分析法应用到了非致命防暴动能弹的效能评估中,对3种防暴动能弹进行了效能评估。为非致命防暴动能弹的研发生产提供了重要的理论支撑。     

Note: Remarks on theory of the core

This note proposes a necessary and sufficient condition for the existence of an undominated core and a necessary and sufficient condition for coincidence of the intersection core and the undominated core. © 2000 John Wiley & Sons, Inc. Naval Research Logistics 47: 455–458, 2000     

外场维护指挥控制系统可靠度模型

分析了影响外场指挥控制系统可靠性的主要因素,以指挥人员为主体,根据战时的实际,对指挥关系进行了重构,将串联指挥关系变为并联关系,通过利用马尔可夫链给出了指挥控制系统状态转移图,建立了计算外场指挥系统可靠性的数学模型。并且进一步给出了计算指挥控制系统的可靠性的方法。     

EMS磁浮列车的轨道共振和悬浮控制系统设计

主要从悬浮控制系统设计的角度来解决磁浮列车的轨道共振问题,研究鲁棒状态观测器的设计,讨论观测器参数的选择方法。仿真和实验的结果表明,所设计的悬浮控制系统可以消除轨道共振,实现磁浮列车的稳定悬浮     

基于3Dmax和OGRE的某型装备视景仿真研究*

某型装备视景仿真的研制对于提高教学质量和训练水平具有重要意义.提出了一种基于3Dmax和OGRE可视类的视景仿真方法,给出了视景仿真系统的总体结构和实现过程,解决了视景仿真过程中一些视点变换、角度控制、场景变化、面板仿真等关键的技术问题.     

虚拟样机在火炮研制及评估中的应用研究

介绍仿真的重要性 ,对虚拟样机的优点进行了概述 ,讨论了火炮的拓扑结构和自由度 ,并建立了各体局部坐标系。首次将 ADAMS的应用引入到装备仿真领域 ,介绍了机械系统仿真分析平台 ADAMS及装备虚拟样机建立的步骤 ,结合Fortran语言编程在 ADAMS环境下建立了装备虚拟样机 ,算例仿真结果证明了武器装备模型及其虚拟样机建立的正确性。基于虚拟样机仿真 ,制定了火炮故障评估方案 ,提出故障评判函数的概念。最后展望了虚拟样机技术在武器装备领域的应用前景     

Bayesian enhanced decision making for deteriorating repairable systems with preventive maintenance

Since a system and its components usually deteriorate with age, preventive maintenance (PM) is often performed to restore or keep the function of a system in a good state. Furthermore, PM is capable of improving the health condition of the system and thus prolongs its effective age. There has been a vast amount of research to find optimal PM policies for deteriorating repairable systems. However, such decisions involve numerous uncertainties and the analyses are typically difficult to perform because of the scarcity of data. It is therefore important to make use of all information in an efficient way. In this article, a Bayesian decision model is developed to determine the optimal number of PM actions for systems which are maintained according to a periodic PM policy. A non‐homogeneous Poisson process with a power law failure intensity is used to describe the deteriorating behavior of the repairable system. It is assumed that the status of the system after a PM is somewhere between as good as new for a perfect repair and as good as old for a minimal repair, and for failures between two preventive maintenances, the system undergoes minimal repairs. Finally, a numerical example is given and the results of the proposed approach are discussed after performing sensitivity analysis. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2008