多路视频同步播放控制的实现

目前所采用的视频处理软件不能满足试飞工程师试飞数据分析处理的专用需求,面临现有商业软件所存在的众多局限性,采用解码库和时间戳同步等方法通过VC编程解决了多种视频音频格式解码、多路视频时间精确同步等关键技术。经过试飞工程师实际使用验证表明,该软件满足试飞视频数据分析处理所需的时间同步、精确定位等专用需求,本文详细介绍了该软件的结构和各功能模块,并讨论了软件的具体实现、技术创新点及软件实现的关键技术。     

试飞讲评与飞行员培训系统软件设计

为了提高试飞效率、缩短试飞周期,根据型号试飞需求,为多目标综合安全监控系统设计试飞讲评软件,结合试飞实时数据处理任务要求,进一步提高试飞的效率和质量,为型号任务有效开展服务。该软件基于地理信息、系统仿真、可视化技术及智能人机交互技术,基于多精度三维数字地图、试飞数据库及试飞任务信息库,建立一个以试飞讲评为主体的数字化环境,设计满足新装备飞行试飞任务事后分析讲评需求的软件。     

基于三维仿真的飞行姿态与航迹监控软件的设计

三维仿真技术在试飞试验领域越来越得到重视与应用。本文介绍了基于三维仿真技术的飞行姿态与航迹监控软件的总体设计结构,并着重阐述了主要组成模块的功能、设计方法与应用效果。该软件的成功研制,使得能够从全局的角度对目标试验机的姿态、位置及系统状态进行掌控。同时,利用回放能够逼真再现飞行全过程,可作为飞行演示和事后分析的一种手段。该软件在提高试飞效率和保障试飞安全方面发挥着重要作用。     

机载网络数据实时处理软件的设计与实现

为了能够满足试飞工程师实时监控飞机状态,及时与试飞员进行沟通,并根据当前的试飞数据随时进行调整,从而提高试飞效率。提出构建一套机载实时监控系统的设计方案与实现方法。网络数据实时处理软件是机载实时监控系统的核心,它按照要求将测试网络上的参数进行实时采集和处理,并将物理量数据发送到各监控客户端,提供给试飞工程师。     

基于IP传输的空地遥控系统设计

现代新航空产品的科研试飞、定型试飞不仅任务量大,且试飞难度大,试飞风险高.为降低试飞风险和试飞成本,实现机载电子系统试飞地空无线遥控操作是有效途径之一.基于IP传输的地空遥控系统通过无线的TCP/IP网络将远程(机载)被控计算机上的软件界面传输到(地面)遥控计算机,将地面遥控计算机的键盘、鼠标等操作指令传递到机载被控计算机上,实现机载电子系统试飞地面无线遥控操作.试验结果验证了设计方案的正确性和可行性.     

雷达威力试飞技术

针对雷达的特点,采用分方向、高度和距离段进行威力统计,克服了传统统计方法的缺陷。文中推导出一定置信度和置信区间时威力试飞的样本量,进一步推导出威力试飞的航次数;然后,开发了威力试飞数据处理软件。该技术客观地鉴定了雷达的性能,对同类雷达试飞具有指导价值。     

CorelDRAW的绘图功能及应用技术研究

CorelDRAW图形绘制软件是一个集图形设计、文字编辑、排版于一体的大型矢量图形制作软件,是目前市场上最受欢迎的平面设计软件之一。为了解决在教学和实际绘图中遇到的问题,结合教学和实践,具体论述了CorelDRAW 图形软件强大的编辑处理功能,并把在教学和实践中研究总结出的一些绘图技术提供给更多的CorelDRAW 用户,以便掌握更多的绘图方法,提高绘图效果和效率,以制作出满意的作品。     

基于LabVIEW7.0的某实时监控软件设计与实时性分析

针对某试飞课题,在NI LabVIEW7.0平台下进行了某试飞科目实时监控软件系统开发。飞行试验中,实验分析了影响该系统试飞参数时间历程图实时刷新的原因,提出了在飞行试验实时监控中,采用优化VI及对Chart控件二次编程的方法解决Chart曲线图实时刷新的问题。在此充分挖掘LabVIEW中Chart控件的属性进行二次编程,解决试飞参数时间历程图实时刷新、显示问题,具有很高的实用价值。     

基于RCP与GEF的组织结构图的设计与实现

文章在介绍Eclipse RCP技术平台和GEF框架的基础上,基于MVC模式设计并实现了一种轻量级的企业组织结构图系统。采用GEF图形框架开发的软件具有结构清晰、可维护性高和代码重用性强等优点。GEF框架为仪器仪表的用户接口、图形编辑软件的开发提供了一个理想的解决方案。     

飞行试验数据自检测系统软件设计

在飞行试验过程中,因缺乏对海量试飞原始数据和预处理结果数据的快速检查和故障定位,导致试飞工程师分析数据的难度急剧增加,影响试飞型号任务的高效进行。在此针对上述问题对飞行试验数据进行自检测技术研究,设计了一个基于参数信息专家数据库的原始数据与预处理结果数据的自动化检测系统软件。该软件可对原始数据进行自动化检测,同时依据专家数据库的自定义判据,对预处理结果数据进行自动化检测和计算处理。经过软件测试和应用,该软件能够有效地解决原始数据和预处理结果数据中的数据异常和错误,提高试飞工程师对海量试飞数据的分析效率。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.