导弹单发杀伤概率影响因素分析

提出了进行导弹单发杀伤概率影响因素分析的必要性,进行了大量的导弹单发杀伤概率仿真计算,对作战条件和弹目交会条件等重要影响因素进行了深入地分析研究,并对导弹的作战使用、战术决策和目标机的最佳规避机动策略进行了深入探讨。研究成果给飞行员在导弹作战使用过程中进行战术决策提供了强有力的科学理论依据。     

对军械装备质量问题的思考

全面分析了影响军械装备质量的因素。简介了影响因素分类,并提出了提高武器装备质量水平,重要途径是加强思想观念的改进,加强军方和军工企业队伍建设,充分发挥军地双方在武器装备质量管理中的重要作用。     

中美军事关系的回顾

中美关系是当今世界最重要的一对大国关系,而军事关系则是其中最为敏感和不确定的环节。早在第二次世界大战时期,尚处于在野党地位的中国共产党及其领导的武装力量就和美国当局进行了早期接触。中华人民共和国成立后,中美军事关系经历了从对抗到合作,再到合作与斗争并存的曲折历程。对中美军事关系进行回顾,有助于把握中美关系的大局,推动两军关系走上平稳发展的轨道。     

防空C3I系统信息融合半实物仿真测试方法

介绍了小型防空C3I系统信息融合的概念以及对其进行考核的实验室仿真测试方法,提出了一种利用侦察源模拟设备、实际通信网络和定位授时替代设备构建测试平台考核小型防空C3I系统信息融合能力的半实物仿真方法,并对目标探测信息源模拟设备设计方法、空情题目设计中应注意的问题等几个方面作了认真分析.同时,结合目前国内防空C3I系统技术发展实际情况,指出了防空C3I系统信息融合能力试验技术今后应重点研究的内容.     

新闻视频数据库基于故事单元的“多线程”管理技术研究

新闻视频关于新闻事件的报道是一种"多线程"的形式,针对这种特性提出了一种基于有向图理论的新闻视频数据库管理方法。研究了故事单元相似关系与图论知识之间的联系,结合最小部分树理论提出了一种将故事单元之间复杂相似关系图简化为"多线程"结构树的新闻视频数据库管理技术。实验显示,这种管理方法对于视频数据库的浏览、检索、摘要等实际需求具有重要的理论意义和应用价值。     

剪刀撑水泥砂浆网薄层加固砌体墙体拟静力试验

主拉应力破坏是砌体结构在地震荷载作用下最常见的一种破坏形式,剪刀撑水泥砂浆网薄层加固法就是针对砌体结构抵抗主拉应力不足的一种加固方法。为了考察该方法加固砌体墙体的受力性能及加固效果,对6片砂浆强度不同、加固方法不同的墙体试件进行了拟静力试验。试验结果表明：剪刀撑水泥砂浆网薄层加固法能够明显提高砌体墙体的抗剪承载力;该方法更适合于加固砂浆强度较低的砌体墙体;采用该方法加固后的砌体墙体破坏形式以剪切滑移破坏为主;加固面层能够与原有墙体较好地共同工作。目前剪刀撑水泥砂浆网薄层加固法是一个崭新的课题,该拟静力试验给出的试验分析结果和建议可供相关研究和加固工程设计参考。     

晋察冀边区军政民代表大会研究

基于抗战初期华北敌后晋察冀军区的成立、边区的开辟及抗战形势的需要,中共中央作出筹建晋察冀边区政府的决策,这一决策始于聂荣臻1937年11月8日的建议;筹建边区政府的组织称谓,不是称"晋察冀边区军政民代表大会筹备处",而是称"晋察冀边区临时政府筹备处";晋察冀边区军政民代表大会的召开,不是1938年1月11日至15日,而是1938年1月10日至15日;与会代表人数,不是146人,也不是148人,而是各县代表145人,筹备委员4人,共149人;边区政府成立时的辖区范围,不是军区成立时的36个县,也不可能建立晋东北、冀西、冀中3个政治主任公署,而是从平汉路西扩展到了冀中平原,达40余个县;边区军政民代表大会选举产生了边区行政委员会,并制定了正确的施政方针和政策,这"两大建树"创造了高举抗日与民主的大旗与运用合法性策略开展工作完美结合的经验。     

Priority queue with customer upgrades

This article is concerned with a general multi‐class multi‐server priority queueing system with customer priority upgrades. The queueing system has various applications in inventory control, call centers operations, and health care management. Through a novel design of Lyapunov functions, and using matrix‐analytic methods, sufficient conditions for the queueing system to be stable or instable are obtained. Bounds on the queue length process are obtained by a sample path method, with the help of an auxiliary queueing system. © 2012 Wiley Periodicals, Inc. Naval Research Logistics, 2012     

Research progress on advanced rail materials for electromagnetic railgun technology

Electromagnetic railgun attracts more and more attention due to its advantage in speed,cost,and obscurity.It is found that the rail should withstand huge mechanical and thermal shocks during the launching operation.The forms of rail failure are accompanied by gouge,grooving,transition,and arc ablation,etc.The service life of the rail has become a bottleneck restricting the development of elec-tromagnetic railgun technology.A series of researches are carried out to solve rail failure,including analysing the failure mechanism and using various advanced rail materials.This paper provides a comprehensive review of rail materials,including material composition,preparation,microstructure,and properties.We begin from a short background of the requirement of the rail material.Then a detailed investigation of rail materials is described,and the performances of those materials are introduced.Finally,further development prospect of rail material is discussed.     

Insensitive energetic microspheres DAAF/RDX fabricated by facile molecular self-assembly

Insensitive energetic materials are promising in the defense weapons field. However, energetic materials still suffer from great challenges and the concern about their safety limits their utilization. In this work, insensitive energetic explosive 3,3′-diamino-4,4′-azoxyfurazan/hexahydro-1,3,5-trinitro-1,3,5-triazine (DAAF/RDX) microspheres were fabricated by self-assembly method. Rod-like DAAF/RDX was prepared by mechanical ball milling for comparison. DAAF/RDX composites with different mass ratios (90:10, 80:20, and 70:30) were obtained. The morphologies and structures of as-obtained DAAF/RDX composites were characterized by scanning electron microscopy (SEM), powder x-ray diffraction (PXRD) and fourier transform infrared spectroscopy (FT-IR). The results showed that DAAF/RDX microspheres exhibited regular shaped microspheres with sizes from 0.5 to 1.2 μm. There was no crystal transition during the modification process. The thermal properties of as-obtained materials were then evaluated by differential scanning calorimetry (DSC) and materials studio software. DAAF/RDX microspheres showed an advanced decomposition peak temperature compared with rod-like DAAF/RDX. The binding energy and peak temperature values at zero β_i (T_P0) of DAAF/RDX (90:10) increased by 36.77 kJ/mol, 1.6 °C, and 58.11 kJ/mol, 12.3 °C compared to DAAF/RDX (80:20) and DAAF/RDX (70:30), indicating the better thermal stability of DAAF/RDX (90:10). The characteristic drop height (H₅₀) of DAAF/RDX (higher than 100 cm) composites was higher than that of raw RDX (25 cm), suggesting significant improvements in mechanical safety. The preparation of DAAF/RDX microspheres is promising for the desensitization of RDX and useful for the formation of other materials and future wide applications.