炮兵指挥系统一体化目标分类方法

在对我军炮兵指挥系统的目标分类现状进行分析的基础上,阐述了建立目标分类标准的重要意义.详细说明了目标分类的原则、考虑因素以及方法,参照全军-体化指挥平台的相关要求制定了炮兵指挥系统目标分类的初步方案,为建立炮兵指挥系统目标分类标准奠定了基础.     

基于动态模型的机场配电网潮流计算新方法

机场配电网因非常情况成为孤立电力系统后,配电系统的电压、潮流和频率等发生巨大变化,传统的潮流计算方法往往会出现收敛性差、计算结果与实际不相符的情况。提出的机场配电网动态潮流计算模型能有效解决此类问题,阐述了机场配电网动态潮流计算模型的构成原理、算法并给出相应算例。通过算例计算证明了动态潮流计算模型适用于计算机场配电网的潮流。     

基于警用特种装备的智能故障诊断专家系统的设计与实现

智能故障诊断专家系统可用以实现对警用特种装备系统各子系统的状态监测和故障诊断,基于此功能阐述了警用特种装备智能故障诊断专家系统的设计原理,给出了系统的实现方法。通过自适应遗传算法的知识获取机制,介绍了其改进的自适应遗传算法原理,解决了知识获取的问题,实现了警用特种装备的状态监测和智能故障诊断。     

晚唐的美丽智慧的芳香——浅析“前线诗人”的无题诗

20世纪30年代,在北平的现代派诗人群体中,被评论家李健吾称作“前线诗人”的废名、林庚、卞之琳、何其芳等曾掀起一股“晚唐诗热”,对中国诗歌传统进行了一次独到的重新发掘与阐释。无独有偶,在这些少数的前线诗人中,废名、林庚、卞之琳都曾不约而同写下了若干无题诗,对应晚唐李商隐的无题诗,他们在自由表现其诗的感觉与理想中亦见出了他们的不同个性与智慧。     

An efficient and modular modeling for launch dynamics of tubed rockets on a moving launcher

This paper develops a modular modeling and efficient formulation of launch dynamics with marching fire (LDMF) using a mixed formulation of the transfer matrix method for multibody systems (MSTMM) and Newton-Euler formulation. Taking a ground-borne multiple launch rocket systems (MLRS), the focus is on the launching subsystem comprising the rocket, flexible tube, and tube tail. The launching subsystem is treated as a coupled rigid-flexible multibody system, where the rocket and tube tail are treated as rigid bodies while the flexible tube as a beam with large motion. Firstly, the tube and tube tail can be elegantly handled by the MSTMM, a computationally efficient order-N formulation. Then, the equation of motion of the in-bore rocket with relative kinematics w.r.t. the tube using the Newton-Euler method is derived. Finally, the rocket, tube, and tube tail dynamics are coupled, yielding the equation of motion of the launching subsystem that can be regarded as a building block and further integrated with other subsystems. The deduced dynamics equation of the launching subsystem is not limited to ground-borne MLRS but also fits for tanks, self-propelled artilleries, and other air-borne and naval-borne weapons undergoing large motion. Numerical simulation results of LDMF are given and partially verified by the experiment.     

编写高质量消防专业教材的思考与实践

编写高质量消防专业教材是武警学院消防精品课程建设和消防工程特色专业建设的重要组成部分。教材建设是一项系统工程,需要在全面统筹的基础上,科学制订教材编写大纲并严格执行;教材内容应体现先进性、科学性和实践指导性,并充分吸收课程教学改革研究和学术科研成果。日积月累、厚积薄发、全面统筹是编写精品教材的前提,环节控制、求新求实、教研结合是编出精品教材的保障。     

Prices and quantities in the arms trade*

There are two main sources of information about the Arms Trade, SIPRI and ACDA. These two sources give very different pictures of the evolution of the market, primarily because their measures are designed to capture conceptually different features. Although they are both expressed in constant dollars, the SIPRI series is designed to be a volume index of physical transfers, the ACDA series a constant price value index. Thus in principle, the ratio of the ACDA to SIPRI series should provide an implicit price index of arms; though in practice there are many measurement problems. In this paper, we discuss the basis of these indices and show that the ratio, the implicit price, not only looks plausible in the light of the evolution of the market, but has a significant negative effect on the demand for arms imports in an econometric equation.     

战斗机综合航电/火控系统的多机协同试飞

结合战斗机综合航电/火控系统发展趋势及其特点,简述了空地一体化试飞、多机协同试飞概念,介绍了一种利用××型飞机综合航电地面支持设施模拟空中动态试验环境和多目标,与数据传输设备、DGPS多目标导航定位系统、数据融合处理系统以及空中试验机构成的多机协同试飞方案.利用仿真模拟与实际飞行相结合,减少空中飞机的数量,利用有限的资源实现多机协同作战试飞体系.对空地一体化试飞、多机协同试飞的关键技术和试飞评估进行了探讨,为战斗机综合航电/火控系统多机协同试飞提出了一种新模式.     

‘Today we shall drink blood’: internal unrest in Nigeria

Despite some tentative internal peace agreements, Nigeria continues to face violence from multiple groups. This violence feeds upon itself, with segments of the population being mobilized both for self defense and for pressing their ideological and practical goals. These multiple sources of violence, which the Nigerian government appears unable to control to any significant degree, have a long term corrosive effect on the country's internal stability. There are few reasons to be sanguine as to any rapid changes to the level of overall violence or the relative number of armed groups, although their specific identities may shift. Nigeria represents a good case study of a country in which relatively low but persistent violence by a multiplicity of groups can have major impacts on internal security.     

DSSS时变窄带干扰抑制算法研究

在传统非线性最小二乘(NLS)算法的基础上,提出一种基于线谱估计的直接序列扩频(DSSS)系统抑制窄带干扰(NBI)的方法。该算法首先通过对基于正弦波叠加模型的NBI进行频率估计,再利用最小二乘准则进行自适应滤波,恢复出干扰信号包络,从而利用干扰对消器将其从观测数据中消除。仿真验证表明,本算法相对于传统的最小均方误差(LMS)算法、自适应频域陷波法,能较好地抑制时变音频NBI模型的干扰,且信息量损失较小。