一类具有接种和饱和发生率的SIR—SVS传染病模型的全局稳定性

研究一类具有接种和饱和发生率的SIR-SVS传染病模型．通过构造适当的Lyapunov函数证明了当基本再生数〈1时,无病平衡点是全局渐近稳定的;当基本再生数〉1时,给出了地方病平衡点全局渐近稳定的充分条件．     

轮式越野车动力学建模及行驶动力学特性仿真

为准确评估某型6×6轮式越野车行驶动力学性能,建立了该越野车的整车多刚体动力学模型,分析了模型的振动固有特性和频率响应特性,并进行了特定工况下的行驶动力学特性仿真,计算了悬架动行程均方根值和车轮动载荷均方根值,分析了悬架与限位块的碰撞概率和车轮跳离地面的概率。结果表明:该动态工况下越野车的悬架设计工作空间满足使用要求,但行驶安全性能较差。     

基于最优打击序列的弹道导弹火力分配模型研究

针对弹道导弹火力计划的拟制过程进行研究。围绕效费比最大化目标,对目标打击序列的影响因素进行了分析,设计了打击目标排序算法;采用层次分析法对弹道导弹打击能力进行了分析,并对打击目标所使用的作战单位排序值进行了计算,建立了最优火力分配模型。该模型不仅可最大发挥作战单位的作战能力,而且满足以最小代价获取最佳打击效果。     

单舰无源迷惑式干扰假目标布设

在介绍迷惑式干扰概念及使用要求的基础上,从导弹的末制导雷达搜索范围的角度,研究了迷惑式干扰假目标如何布设的问题,建立了相应数学模型并进行了仿真,通过对仿真结果的分析得出了结论。     

基于蒙特卡洛和multi-Agents的舰艇编队维修保障能力优化求解

针对舰艇编队的维修保障能力评估,采用蒙特卡洛方法和智能计算技术进行了建模,并在分布交互仿真环境下进行了求解.通过将舰艇编队维修系统按维修单位的功能划分成多个子系统,每个子系统抽象为能进行局部优化的Agent,实现了基于Agent的建模.在此基础上,重点讨论了基于HLA的仿真环境,通过应用RTI的服务确保了求解过程的时空一致性.仿真试验结果表明:通过采用蒙特卡洛方法、智能技术及分布交互仿真技术相结合的方法,能有效地对舰艇编队的维修保障能力进行评估.     

略论孙子战争控制观

战争控制是战争指导者对战争的发生、发展、规模、强度及后果等有意识地加以限制和约束的行为。一代兵学大师孙武对战争控制问题给予了较高的重视,并进行了较多的论述。本文试图从“安国全军”的整体控制观、“致人而不致于人”的主动控制观、“战胜强立”的实战控制观,“全争天下”的综合控制观等四个方面对孙子的战争控制观加以阐释。     

乱世元勋的为将为臣与为人——唐代名将郭子仪功业中的人格因素分析

封建专制时代的将领,建功立业不仅要有非凡的军事才能,还要有高超的人事协调艺术。否则,非但功业难成,身家性命也难保全。本文以唐代名将郭子仪为蓝本,通过对郭子仪为臣、为将、为人三方面处世之道的深入分析,廓清了封建专制时代武将建功立业不得不具备的人格因素。     

论朱德对我军战略战术形成与发展的重大贡献

朱德精辟阐述了以“群众战”为基本内容的人民战争思想,科学提出了红军进行游击战争的指导原则和作战方针,系统论述了抗日游击战战略战术,丰富和发展了我军在解放战争中的战术原则与战术运用,对我军战略战术的形成与发展具有历史性贡献。     

Fracture mechanism of a cylindrical shell cut by circumferential detonation collision

The failure mechanism of a cylindrical shell cut into fragments by circumferential detonation collision was experimentally and numerically investigated. A self-designed detonation wave regulator was used to control the detonation and cut the shell. It was found that the self-designed regulator controlled the fragment shape. The macrostructure and micro-characteristics of fragments revealed that shear fracture was a prior mechanism, the shell fractured not only at the position of detonation collision, but the crack also penetrated the shell at the first contact position of the Chapmen-Jouguet (C-J) wave. The effects of groove number and outer layer thickness on the fracture behavior were tested by simulations. When the thickness of the outer layer was 5–18 mm, it has little effect on fragmentation of the shell, and shells all fractured at similar positions. The increase of the groove number reduced the fracture possibility of the first contact position of the C-J wave. When the groove number reached 7 with a 10 mm outer layer (1/4 model), the fracture only occurred at the position of detonation collision and the fragment width rebounded.     

Numerical investigation on cooling performance of filter in a pyrotechnic gas generator

As a key part of the pyrotechnic gas generator,the filter not only removes the particulate matter but also cools the hot gas to a safe level.This paper aims to improve the understanding of the basic heat and flow phenomenon in the gas generator.The pyrotechnic gas generator is modelling by a simplified filter structure with fiber arrays.A finite-volume model of the heat and fluid flow is proposed to simulate the detailed multi-dimensional flow and energy conversion behaviors.Several verification results are in good agreement with data in different references.Simulation results demonstrate that the filter can not only absorb heat from the gas but also cause the high intensity enhancement of the heat transfer.The per-formance difference between inline and staggered arrays is also discussed.The findings of the study put a further prediction tool for the understanding and design of the filter system with fibers.