Facility location for an extraterrestrial production/distribution system

This paper extends traditional production/distribution system analysis to address raw material, factories, and markets located beyond Earth. It explains the eventual advantages of such operations and discusses likely sites in the solar system. It furnishes a typology for production/distribution systems, assessing the fit of each type to space operations. It briefly reviews the physics of orbits. It develops transportation and inventory cost functions for the simplest case of Hohmann trajectories, and for transportation between circular orbits of similar radii using higher‐energy trajectories. These cost functions are used to derive a model of production/distribution system cost, the minimization of which selects an optimal factory location. The paper suggests potential extensions to this work, and concludes with ideas for location research on the novel reaches of extraterrestrial space. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005.     

复杂电磁环境下某战术通信网抗干扰效能评估

构建了复杂电磁环境下某战术通信网抗干扰效能评估的指标体系,运用灰色层次分析法和群组决策特征根算法对抗干扰效能进行了评估。评估结果表明,该网在复杂电磁环境下的抗干扰效能一般,需要采取相关抗干扰对策,以提高其复杂电磁环境下的抗干扰能力。     

低轨微小卫星姿态控制方案

针对轨道高度低于500km微小卫星姿态控制问题,从充分利用环境力矩的角度出发,提出一种主动磁控+气动稳定力矩的姿态控制方案.该方案较好地解决了局部稳定控制律的全局稳定问题.仿真结果表明:特征距离d∝是影响该控制方案的主要因素.d∝值越大,对控制越有利,但随着d∝值的增大,卫星总体设计难度也会加大,因此实际中应选择合适的...     

关于成立突发环境事件应急救援队伍的实践与思考

随着工业化、城市化和现代化水平的提高,各种具有现代特点的城市灾害,给国家和人民群众造成了巨大的财产损失和人员伤亡。其中突发环境污染事件是消防部队亟待解决的重要课题。结合山西朔州市环境应急救援队成立3年来的成功实践,提出消防部队承担环境应急救援的几点思考。     

基于反坦克导弹模拟训练的虚拟战场环境设计与实现

虚拟战场环境是军事仿真应用的可视化平台。结合反坦克导弹模拟训练需要,对虚拟战场环境的建立进行了论述,给出了具体的设计方案,实现了一个逼真的射击训练模拟环境。所涉及到的虚拟战场环境已成功应用于反坦克导弹模拟训练当中。     

虚拟战场中坦克的快速碰撞检测算法

为了使虚拟战场中的坦克仿真运动有较高的真实性,必须处理坦克与场景中的物体及地形的碰撞问题。提出了碰撞检测的简化包围盒算法及地形匹配算法,分别解决这两种碰撞问题。在地形匹配算法中,依据地形平均曲率划定地形范围,地形平缓的地带采用两点匹配法,变化较为剧烈的地带采用三点匹配法。这两种简化的处理方法降低了系统的计算要求,满足了系统仿真的真实性需求。     

基于图像的虚拟战场环境

简要总结了IBR技术的发展和现状,比较了各种模型的特点,分析了虚拟战场环境生成应包含的内容,提出了实现该环境需解决的关键技术.采用多同心圆可以构建大范围场景视点模型,分析了一种基于基础矩阵的相机参数标定方法,实现了一种基于面积和特征线的图像整合算法,对战场图像采集存储提出了初步方法.最后提出了系统实现的基本框架,为进一步研究打下了良好的基础.     

导弹阵地静电电磁环境效应初探

从静电的定义及产生方式、危害及形成条件2个方面,简述了静电;结合导弹阵地的实际电磁环境,从提高导弹武器系统的可靠性等3个方面,具体论述了开展导弹阵地静电电磁环境效应研究的意义;研究了导弹阵地静电源的形成机理和作用机理;结合导弹阵地的静电研究结论,从抑制静电累积、采取EMC措施等4个方面对导弹阵地的静电防护作了讨论。     

Protection of armoured vehicles against chemical,biological and radiological contamination

The article presents problems related to mechanical protection of vehicles with different add-on armours against chemical,biological and radiological contamination.This applies to vehicles with additional passive,reactive and hybrid protection in the form of cassettes against piercing with anti-tank pro-jectiles,piercing with their kinetic energy of impact,and as a result of chemical energy of shaped charges as well as explosively formed projectiles.It has been shown how increased ballistic protection of these vehicles at the same time reduces their decontaminability in various places of the vehicle due to the increased additional surface of the vehicle with cassettes.Prevention of contamination of these cassettes has been presented as a way of reducing hard to reach surface for decontamination and a method of insulating construction elements(stands),fixing these cassettes to the vehicle,from the environment to prevent contact with contaminated liquids and dusts.The selection of appropriate materials is shown,which may affect the improvement of the decontamination efficiency of the vehicle with such cassettes.This applies to the use of materials with low absorption of chemical warfare agents,which prevent the accumulation of large amounts of these agents on contaminated surfaces and improve the effectiveness of decontamination.It also shows how to ensure better access of the disinfectant to as much of the vehicle surface as possible,covered with cassettes that have been contaminated.It shows how a vehicle,in particular with such cassettes,can provide protection against radar detection when Radar Absorbent Material is used on vehicle cassettes.     

决策支持系统可视化快速集成环境

决策支持系统的快速集成环境的研究一直是决策支持系统研究的核心内容。本文研究了决策支持系统可视化快速集成技术及其实现 ,并重点介绍了作者开发的决策支持系统可视化快速集成环境研究Vi sualDSSBuilder及其在开发过程中所解决的技术难题。