无线自组网在防空导弹网络化作战中的应用研究

在网络化作战的模式下,通信网络已变得同武器平台一样重要,需要具有一定的快速反应能力、灵活性和抗毁性。针对防空导弹网络化作战的特点和对通信网络的需求,将无线自组网技术应用于防空导弹网络化作战中,并且分析了其优势。结合防空导弹部队的组织特点,探讨了具有分级结构的无线自组网网络实现方法和作用,结合现状展望了其发展方向。为构建适合防空导弹网络化作战的无线自组网提供一定的参考依据。     

基于短波信道的无线自组网链路层协议研究

主要针对短波信道特点,利用定向天线在空分复用方面的优势,研究定向天线用于短波无线自组网的应用方案;借鉴传统无线移动自组网数据链链路层TDMA协议,提出了一种基于短波信道无线自组网的链路层协议;并通过Opent仿真软件对提出的协议进行比较分析,证明该方案具较原协议在吞吐量、时延、负载上具有一定提升。     

基于自适应重构的多弹协同自组网技术研究

为满足弹群编队协同作战的智能化需求,开展基于自适应重构的多弹协同自组网技术研究,重点介绍自适应重构自组网的网络体系架构、工作流程以及关键技术。将认知网络的认知环概念引入自组网,提出了基于认知的自适应重构技术、自适应按需加权分簇算法以及基于地理位置信息的自适应重构路由技术,使多弹协同自组网初步具备"自感知-自决策-自配置-自优化"等智能化特征,为导弹武器装备的智能化提供新的理论思路。     

无线自组网分布式编码域非正交多址机制性能分析

基于无人平台集群的分布式协同作战是未来战争的发展趋势,由此对智能集群无线自组网通信提出了快速响应的性能需求。针对现有无线自组网分布式多址接入机制在复杂多变战场环境与时断时续通信链路中存在的效率下降、无法满足快速响应需求的问题,提出基于分布式协同的编码域多址(DC-CMA)机制。DC-CMA机制以分布式无线自组网邻居节点信息维护与非正交多址技术为基础,设计高效的接入编码图样,通过降低图样稀疏性减少资源浪费,提高多址机制整体资源效率。数值仿真结果表明,在信道中断率相同时,与正交多址机制相比,DC-CMA机制可将信息交互周期缩短10%~50%,提升通信资源效率达5%~30%。利用无线自组网节点设备样机,模拟分布式协同任务数据进行端到端传输时延测试,得出DC-CMA机制相比于正交多址机制可降低平均传输时延超过30%,能够为提升无人平台集群分布式快速响应协同能力提供支撑。     

基于QUIC 的无线自组网数据同步算法

针对轮询和gossip 2 种数据同步存在的应用局限性问题,结合快速UDP 网络连接(quick UDP internet connections,QUIC)传输协议和gossip 算法的特性,提出一种基于QUIC 的无线自组网数据同步算法。介绍 QUIC-gossip 算法的核心原理、数据传输策略和动态拓扑适应性,并通过实验和性能评估进行验证。结果表明：该 算法能够降低同步数据的延迟,具有鲁棒性较强、数据传输较快和适应性较强的特点,为解决无线自组网中的数据 同步问题提供了一种新方法。     

多无人机协同作战通信自组网技术

移动自组织网络以其高度的自治性、抗毁性和拓扑动态可变性等突出优势成为非常适合于组建无人机网络的技术。阐述了无人机自组网的概念与特点,介绍了国外无人机自组网的研究情况,探讨了无人机自组网的关键技术。分析了无人机自组网面临的问题。     

基于IEEE802.11s协议的弹载组网终端

针对弹群网络需要依托地面交互设备进行通信,无法为弹药集群提供动态、灵活、高效的自组织网络的问题,提出了基于IEEE802.11s协议的弹载组网终端。该弹载组网终端采用无线Mesh组网技术,通过速率自适应的MAC协议以及跨协议层的AODV路由算法,实现了在高动态环境下弹群节点的自组网功能。实测结果表明,该弹载组网终端传输距离、传输带宽及传输延迟等方面均能满足自组网传输要求,同时满足弹载安装环境的小型化要求,可以应用到巡飞类弹药上,使弹药集群达到灵活、高效组网的目的。     

基于无线自组网的莫尔斯译码节点的研制

目前对莫尔斯信号的译码器的研究都是针对单一信号源,信息传到PC机以后才能实现网络化传输。新研制的译码节点利用无线自组网技术将所有不同信号源的信息同时经过多跳网络传到PC,而且采用新的概率法来判定码速和各种纠错方法提高解码的正确率;还具备了如下特色：微小型、低成本、低功耗、网络化与可视化。     

联网水雷阵及其关键技术研究

联网水雷阵由联网水雷和无线浮标节点组成。当目标进入联网水雷阵监控区域时,各水雷节点在分布的空间和时间上,获得目标的特征信息,并通过网内信息处理技术,实现对战场目标的定位、分类识别和跟踪。其关键技术包括：联网水雷阵自组网、联网水雷阵网内信息处理、联网水雷阵智能控制和联网水雷阵的低功耗技术等。     

Ad Hoc网络的发展及其在军事通信中的应用

该文主要结合Ad Hoc网络的结构和特点，介绍了网络发展的历程，针对网络在军事通信中的应用主要介绍了一种面向军事通信开发的无线自组网系统NTDR（Near Term Digital Radio）。     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

Stability of the Third Generation Intensifier under Illumination

The stability under illumination of transmission-mode GaAs photocathode sealed in the third generation intensifier is investigated by use of spectral response testing instruments. The variations of spectral response with the illumination times under weak and intense illumination are compared. The variations of photoemission performance parameters are also characterized. The results show that during initial several weak illuminations photocathode behaves no evident decay and a maximum sensitivity is achieved, while under intense illumination the sensitivity of photocathode begin to decrease largely at the first illumination. The calculated performance parameters show that the variation of surface escape probability with illumination times is a direct cause of instability of photocathode. It is also found that under intense illumination peak wavelength is moved towards short-wave and peak response is decreased, which shows that the ability of long-wave response of photocathode is decreased.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Design and Implementation of One Missile Visual Simulation System Based on OpenGL

The implementation of a missile＇s visual simulation system is explained that is developed with OpenGL（open graphic library） and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile＇s data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Dynamic Encryption Technology in Ad-hoc Networks

A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.