车载非静止轨道卫星监测系统链路计算

非静止轨道(NGSO)卫星通信发展迅猛,但由于相关设备的缺乏,对其下行信号频率轨道资源占用情况监测较少,因此,设计NGSO监测系统为当前急需解决的问题。设计车载监测系统要求具有低的余量,而当前卫星监测系统通信链路计算过程考虑不够精确,文章通过研究ITU相关建议书,考虑NGSO通信链路中存在的大气、雨水、云层和电离层闪烁等相关因素,计算在特定接收余量下的车载监测系统地空链路损耗,为该系统设计提供更精确的依据,同时对GSO链路设计也具有参考意义。     

多传感器数据融合睡眠监测系统设计

鉴于当前的睡眠监测设备存在佩戴复杂、设备昂贵、功能单一和检测方法不合理等情况,设计了一种多传感器数据融合的睡眠监测系统.本系统以STM32F407ZGT6为核心主控芯片,通过可穿戴式背心传感器将所采集到的人体特征信号进行处理、存储和发送到手机App端,针对单一传感器检测可靠性较差的特点,本系统采用了多传感器进行采集分析.经过测试表明,该系统实现了常用睡眠参数的准确监测.     

航电ARINC429总线监测系统的设计与实现

针对某型号飞机航电系统与总线网络通信故障的监测需求,我们设计了ARINC429总线监测系统.该系统设备为一台便携工控机,通过ARINC429信号接收板卡实时、高效地对总线信息进行接收、分析和显示.依照航电总线标准ICD（接口控制文件）库进行解析,能够准确、快速的定位故障,避免了设备的无故障拆装,提高了维护效率.实验表明,该总线监测系统实时稳定可靠,能够满足设计需求.     

一种用于低温超导体监测的单接收机分布式单模光纤测温系统

为了解决常规测温系统采用双接收机机制时随时间变化导致测量误差大和定位精度低的问题，设计了一种用于低温超导体监测的单接收机分布式单模光纤测温系统，系统采用单接收机和抗偏振等方式，可实现对低温超导体快速、高定位精度的温度测量。根据系统设计方案搭建了温度测量精度、定位精度的测量实验系统，并在液氮下对低温超导进行了测试与分析。实验结果表明：当光纤处于-196℃的液氮区域时，测得平均温度为-193℃，温度分辨率为0.1℃，测温精度为±3℃，定位精度为0.4 m，测温时间为100 ms。     

基于SP37的新型TPMS系统设计

简要介绍了胎压监测系统(TPMS)的组成,提出了一种基于新型传感器SP37的胎压监测系统.该系统采用SP37和MAX1473作为无线收发芯片,详细阐述了其软件和硬件设计中的关键技术.实际测试效果表明,该系统接收灵敏度可达到-100 dBm,高速跑车时速100 km时工作稳定.     

煤矿传送带超声检测系统设计

以FPGA为核心,采用100 kHz轮式超声波换能器,设计了一种煤矿传送带无损检测系统.该设计主要包括超声波收发模块、FPGA控制模块、USB通信模块以及基于小波变换的信号处理.该检测系统能够准确检测传送带在运转中出现的损坏情况,其结果以USB的方式传送到上位机.     

基于图像识别的广播电视异态辅助监测系统

本文将图像识别技术与广播电视传统业务相结合,设计了一套广播电视异态辅助监测系统,可对异态画面进行实时监测并准确识别,达到缩短值班员预判、处理故障时间的目的.该系统与原有技术系统相互独立,无交叉耦合,设计合理,搭建方便,具有较高的实用效益和推广效益.     

基于FPGA的TDM交换系统在视频监测中的应用

提出了一种利用基于FPGA的TDM交换系统的视频监测系统设计方案.在设计过程中采用了模块化的设计思想,综合考虑了数据延时、系统成本、功能移植、交换设置多个方面的需求.通过性能分析和实际的测试,说明该方案可很好地应用于视频监控系统设计中.     

基于SHT10的温湿度监测系统的设计

本温湿度监测系统以AT89C51为核心,以温湿度传感器SHT10作为测量元件,采集并实时显示传感器的测量数据,另外它还具有调节上下限并进行报警设置等功能。文章给出了硬件的设计过程和软件流程图,并进行了仿真,仿真结果表明,当温度变化范围为0~40℃,测量精度为±1℃;湿度变化范围为10%~100%RH,测量精度为±5%RH。该系统结构简单、携带方便、精度高,非常适合温室大棚及粮食存储等工厂企业应用。     

基于LabVIEW的单通道温度监测系统设计

为实现温度的适时监测和超限报警,文中利用LabVIEW图像化软件对单通道温度监测系统进行了设计开发。通过软件设计和硬件实验,该系统具有温度数据实时显示及自动存储、超限报警等功能。实验结果表明,所设计的温度监测系统具有采集时间短、温度阈值设置灵活等特点,可广泛应用于不同领域。     

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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NOTICE OF CHANGING JOURNAL OF ELECTRONICS （CHINA） TO MICROSYSTEMS ＆ NANOENGINEERING

正Journal of Electronics(China)(JE)was founded in 1984,sponsored by the Institute of Electronics,Chinese Academy of Sciences.JE is one of the first English academic journals in China in the field of Electronics and Information technology.The journal was published quarterly since it was launched in 1984 to 2003,then it is published bimonthly till now.During