定型机数据采集器的抗干扰技术研究

定型机数据采集器工作在电磁环境非常恶劣的场所,良好的抗干扰技术是数据采集器可靠工作的基本保证。本文分析了定型机数据采集器的干扰信号的主要来源,从硬件技术与软件技术两方面对干扰信号进行了处理。     

用虚拟仪器设计话路特性测试系统

虚拟仪器技术是基于计算机的测量技术,与传统测量技术不同。虚拟仪器技术指在包含数据采集设备的通用计算机平台上,根据需求高效率地构建起的测量系统。LabVIEW是一个虚拟仪器的开发平台,LabVIEW提供了几乎所有的信号处理函数和大量现代的高级信号分析工具,并且非常容易和各种数据采集硬件集成,主要说明利用虚拟仪器技术与LabVIEW实现交换机话路特性测试系统。     

虚拟仪器数据库技术在油中气体在线监测装置中的应用

介绍了虚拟仪器数据库技术在变压器油溶解气体在线监测装置中的应用，把数据库技术应用于虚拟仪器中，既利用了虚拟仪器数据采集和数据分析能力强的特点，又能发挥数据库的管理优势，大大扩展了虚拟仪器的功能。     

闪存K9F3208W0A在放射性勘查仪数据采集器中的应用

文章针对野外测量数据存储方面的具体需要，介绍了采用大容量，低功耗，高可靠性的闪速存储器K9F3208W0A设计放射性勘查仪数据采集器的硬件电路和软件设计方法，同时介绍了K9F3208W0A闪存芯片的性能，特点和应用方法。     

基于LabVIEW的数据采集与信号处理系统设计

针对虚拟仪器技术具有性能高,易于实现硬件和软件集成等特点,将虚拟仪器技术和LabvIEW应用于测试领域。以计算机和NI9201数据采集卡为硬件,以LabVIEW8．6软件作为开发平台,构建了数据采集与信号处理的虚拟测试系统。系统由信号源和信号处理模块组成,其中信号源部分包括数据采集卡采集的模拟信号模块、虚拟信号发生器仿真信号模块;信号处理部分包括对信号源的时域测量、波形显示、滤波、频谱分析等,完成了对实际模拟信号和仿真信号的采集、信号分析与处理。     

基于LabVIEW的数据采集系统设计

虚拟仪器技术是在硬件软件化的进程中应运而生的,广泛应用于工业自动化领域。本文提出了一种基于LabVIEW的数据采集系统。该系统运用图形化编程语言LabVIEW 8.2软件开发平台,结合计算机、PCI-6013数据采集卡等硬件构建了一个虚拟仪器数据采集系统。此系统能有效的实现实时多通道动态数据采集、数据流实时存盘、试验数据的分析处理、历史数据查询和波形回显和生成试验报告等功能。     

基于LabVIEW的远程数据采集的实现

目前在测控领域中越来越多地采用虚拟仪器技术来构建数据采集和处理系统,而随着Internet的普及和深入,网络化的虚拟仪器应用越来越广泛。本文应用LabVIEW内嵌的Web Server服务功能实现远程数据通信的方法及特点,并以自制嵌入式USB接口数据采集卡为例,说明了基于LabVIEW的虚拟仪器技术进行远程数据采集的过程有实用和参考价值。     

VI技术在扩展测试仪器功能上的应用

对虚拟仪器的概念及虚拟仪器的软硬件构成做了介绍，应用虚拟仪器技术构建了一个扩展传统测试仪器功能的自动测量系统，并对这个虚拟仪器的硬件构成及软件功能做了阐述。最后指出虚拟仪器是仪器技术的长远发展，其应用具有重要的现实意义。     

基于LabView的透反射率自动化测量控制及数据处理系统

应用虚拟仪器技术,结合PC机以及通用数据采集硬件卡等硬件设备,针对透反射率自动化测量系统,研究设计了基于LabView的自动化软件控制及测量系统.该系统软件部分采用模块化、开放性的结构设计,实现了透反射率的自动化测量、控制及数据处理.     

基于虚拟仪器的USB接口数据处理系统设计

为了利用虚拟仪器技术实现通过USB接口的数据采集及处理,介绍了虚拟仪器及其开发环境LabVIEW的特点,分析了LabVIEW 中的数据采集技术,给出了利用虚拟仪器技术实现通过USB接口的数据采集及处理系统的应用实例。设计测试表明,将虚拟仪器与LabVIEW结合用于常规的数据采集、测试、测量等任务,可以减少系统的开发时间,同时也提高了编程效率,节省了系统成本。     

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.