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。     

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.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

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.     

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.     

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.     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.