大型商业综合体内影院消防设计探讨

重点介绍了某大型商业综合体内影院的消防设计方案,并进行烟气流动和人员疏散的数值模拟分析,得出该影院消防设计是安全可行的.为确保此类影院的消防安全,建议其疏散楼梯设计不受商场营业与否的影响,且应定期维护保养消防系统.     

基于FPGA的二维DCT／IDCT高速设计与实现

二维离散余弦／反余弦变换是图像处理算法的核心。基于DSP处理器或软件实现速度较低,以及ASIC实现芯片的面积和功耗都较大,本文研究了一种基于行列分解结构的二维DCT／IDCT变换,在两级一维DCT／IDCT变换之间插入双RAM结构,通过乒乓操作保证了前后级DCT／IDCT运算的并行性,提高了运算速度。电路结构在QuartusII中进行了逻辑综合,通过Modelsim编写激励对逻辑功能进行了仿真验证,并将仿真结果与Mat—lab仿真结果进行了比较。结果表明该模块功能正确,能够为图像处理提供良好的处理性能。     

基于马尔科夫决策的目标选择策略

目标选择是军事计划的关键要素之一。基于马尔科夫决策方法,解决具有复杂目标间关联的多阶段目标选择问题。使用与或树描述目标体系各层状态间的影响关联,并以目标体系整体失效为求解目的,建立了基于离散时间MDP的多阶段打击目标选择模型。在LRTDP算法基础上提出一种启发式方法,通过判断从当前目标体系状态到达体系失效状态的演化过程中的可能资源消耗和失败概率,来提供对当前状态的评估值,该方法能有效排除问题搜索空间中不能到达体系失效目的的中间状态,压缩了由于目标间复杂关联而增长的巨大状态空间。用实验验证了该方法有效性,实验结果表明,该方法直观实用,对目标间具有复杂关联关系的目标打击决策有一定参考价值。     

数字图像处理的“炮身轴线偏移”检测系统设计与实现

通过解决基于数字图像处理的环境光自适应技术、激光成像自拟合技术、分辨率自适应技术等关键技术,设计并实现"炮身轴线偏移"检测系统,提高了"炮身轴线偏移量"检测效率。经实验验证,该检测系统误差符合检测要求,且具有结构简单、操作简便、精度较高的优点,是可行的。     

军用数字地图中政区的构建及绘制方法

依据境界之间的拓扑数据,采用拓扑分析、边界追踪、边界闭环构建、边界约束下的凸分解、区域填充和边界符号化等技术手段,提出了OpenGL渲染环境下军用数字地图政区的构建方法.通过具体的软件开发和真实数据的测试,证明该方法生成政区准确、符号美观,可适用于不同比例尺下数字地图的显示.该算法具有较强的通用性,遵循国军标的相关规定,已经在相关数字地图软件中得以应用.     

ON THE USE OF TERROR WEAPONS VERSUS MODERN WEAPON SYSTEMS IN AN ARMS RACE BETWEEN DEVELOPED AND LESS DEVELOPED COUNTRIES

Some of the most active arms races are taking place between developed and less developed countries. The inability of less developed countries to compete financially, as well as technologically, with developed countries may be forcing the former to acquire terror weapons (TWP). The Iran–Iraq war in the 1980s and the events of 9/11 proved that the use of TWP is no longer a mere threat; there are several organizations and countries that will not hesitate to use them. This study develops a model of resource allocation in an arms race between a developed country that is characterized by state‐of‐the‐art technology and high GDP, and a less developed country whose technological capability and GDP are much lower. The model is used to predict the optimal mix of weapons of the two countries that are engaged in the arms race. Applying the model to the arms race between Israel and Syria demonstrates its use.     

U.S. SPACE WEAPONS

Under the administration of President George W. Bush, Pentagon rhetoric has increasingly articulated a more robust vision of space as a future battlefield. This analysis details some of the ongoing spending for research and development programs identified in current U.S. Air Force, Missile Defense Agency (MDA), and Defense Advanced Research and Planning Agency (DARPA) planning and budget documents related to “space control” and “space force projection.” This analysis finds that current support for “space superiority” and “space control” systems remains largely rhetorical—with little actual budgetary support. Unclassified technology development programs included in the six-year Future Years Defense Plan are a decade or more away from deployment. Programs related to offensive counterspace, space-based missile defense interceptors, and space-based strike total slightly less than $300 million in FY 2006 funding. We conclude significantly higher expenditures in research and development would be required to develop and deploy killer micro satellites, space-based missile defense interceptors, and military space planes.     

U.S.–RUSSIAN NUCLEAR COOPERATION AND THE CTBT

Post-Cold War “lab-to-lab” collaborations on unclassified scientific issues between U.S. and Russian nuclear weapons laboratories set the stage for bilateral cooperation in materials control and other nuclear areas. They also became the major element in a cooperative process initiated by a Presidential Decision Directive to ensure Russia's compliance with the Comprehensive Nuclear-Test-Ban Treaty. These collaborations have always been highly favored by leaders of the Russian nuclear weapons complex—the same leaders who oversee Russia's participation in various government-to-government programs. This article reviews these collaborations and examines the possibility that U.S. rebuffs of Russian proposals and the U.S. failure to keep promises of expanded collaboration could contribute to Russia's reluctance in major programs and even lead to a return to nuclear testing by Russia. The author argues that a renewed U.S. commitment to the process should be an immediate goal of the Obama administration and is an essential step in re-engaging Russia to solve the nuclear problems remaining from the Cold War. Steps for doing so are recommended.     

针对DSA滑动窗口算法实现的指令Cache计时攻击

在现有的针对RSA等公钥密码的指令Cache计时攻击的研究基础上,提出了一套可行的针对DSA的指令Cache计时攻击方法,并对计时信息采集、识别、密钥恢复等环节进行了研究,给出了一种随机密钥恢复算法。搭建了攻击实验平台,利用编写的间谍程序对滑动窗口算法实现的DSA签名进行了实际攻击,验证了指令Cache计时攻击方法是可行、有效的．     

基于复杂网络理论的作战系统结构拓扑模型研究

基于复杂网络理论,分析了信息化作战系统网络结构,构建了传统作战系统和信息化作战系统拓扑模型的生成算法,并通过对传统作战系统和信息化作战系统结构拓扑模型度量性质的比较,说明了信息化战争下的作战系统结构特点,为进一步研究网络化战争提供了良好的模型基础．