GJB 908A-2008《首件鉴定》实践应用浅析

本文主要是结合工作实践,从全面把握标准内涵、综合掌握相关的信息,开展首件鉴定工作的条款要求等方面对GJB 908A-2008实践应用的认识和体会。     

俄罗斯总参军事学院的发展沿革与地位作用

俄罗斯总参军事学院,全称为俄联邦武装力量总参谋部军事学院,是俄罗斯的最高军事学府,自1832年创建以来,长期担负为俄军培养高级军官的任务,被誉为俄罗斯"高级军事干部的熔炉".冷战结束后,该学院除继续为全军培养高级军事人才外,还作为俄罗斯军事学术研究中心,引领并推动俄军的军事学术创新,代表了俄罗斯军事学术研究的最高水平.     

不同时期我国武器装备科研生产许可制度

我国的武器装备科研生产许可证制度从无到有,再到逐渐完善,历经10多年的时间,每次变化都代表一次进步,本文旨在对几次许可证制度进行总结,分析其特点。     

Balancing a one‐way corridor capacity and safety‐oriented reliability: A stochastic optimization approach for metro train timetabling

In urban rail transit systems of large cities, the headway and following distance of successive trains have been compressed as much as possible to enhance the corridor capacity to satisfy extremely high passenger demand during peak hours. To prevent train collisions and ensure the safety of trains, a safe following distance of trains must be maintained. However, this requirement is subject to a series of complex factors, such as the uncertain train braking performance, train communication delay, and driver reaction time. In this paper, we propose a unified mathematical framework to analyze the safety‐oriented reliability of metro train timetables with different corridor capacities, that is, the train traffic density, and determine the most reliable train timetable for metro lines in an uncertain environment. By employing a space‐time network representation in the formulations, the reliability‐based train timetabling problem is formulated as a nonlinear stochastic programming model, in which we use 0‐1 variables to denote the time‐dependent velocity and position of all involved trains. Several reformulation techniques are developed to obtain an equivalent mixed integer programming model with quadratic constraints (MIQCP) that can be solved to optimality by some commercial solvers. To improve the computational efficiency of the MIQCP model, we develop a dual decomposition solution framework that decomposes the primal problem into several sets of subproblems by dualizing the coupling constraints across different samples. An exact dynamic programming combined with search space reduction strategies is also developed to solve the exact optimal solutions of these subproblems. Two sets of numerical experiments, which involve a relatively small‐scale case and a real‐world instance based on the operation data of the Beijing subway Changping Line are implemented to verify the effectiveness of the proposed approaches.     

加强软件密集型装备综合保障能力的思考

随着软件密集型装备的大量使用,软件密集型装备的地位越来越突出。本文阐述了加强软件密集型装备综合保障能力建设的重要性,对国内外软件密集型装备综合保障的研究情况进行了比较分析,并提出推进我军软件密集型装备综合保障能力建设应该把握的问题。     

军事通信中ad hoc网络路由协议性能分析

移动ad hoc组网灵活,抗毁性很强,将在未来的军事通信中发挥重要作用。因此,对于移动ad hoc网络研究中的首要的路由问题作了探讨,先简要介绍了两种典型的路由协议OLSR(Optimized Link State Routing)和AODV(Ad hoc On-Demand Distance Vector Routing),接着利用网络仿真工具OPNET分析了AODV的协议特点,最后比较了两种路由协议的性能。仿真结果表明AODV路由开销小,但时延大,节点移动过快时存在路由稳定性的问题;OLSR路由开销很大,但时延相对较小。因此在搭建军用adhoc网时,应根据实际使用情形做出选择。     

装备容差设计技术探讨

容差设计是健壮设计的重要组成部分,装备容差设计是复杂装备设计的重要内容之一。本文针对装备有寿件容差设计和低组装等级容差设计进行了初步探讨,给出了计算方法,并结合实例说明了计算过程。     

伪装武器装备的几种方法及发展浅谈

伪装武器在现代防空作战中有重要意义，介绍了目前伪装武器装备的几种基本方法、各自的定义、优缺点，并结合实际说明伪装方法的应用，从中得出了一些有益的结论。     

20世纪六七十年代中国战备指导思想浅析

新中国成立后,一直面临着帝国主义的封锁、包围和战争威胁.特别是进入20世纪60年代中期以后,随着中国周边安全环境的日益恶化,新中国领导人开始强调要准备打仗,提出并确立立足于"早打、大打、打核战争"的战备指导思想.     

浅谈装备技术状态控制与监督

装备技术状态控制是技术状态管理的重点与核心,贯穿于技术状态项目研制、生产全过程,也是军事代表开展技术状态管理监督的重点。本文主要对技术状态控制和监督的内容进行了介绍,并着重介绍了在控制和监督过程中应注意的几个问题。