基于TS101的PCI接口高速数据采集系统的设计

给出了基于TS101和PCI的双通道数据采集处理系统的设计方案。首先介绍了ADI公司新型数字信号处理(DSP)微处理器TS101和FLYBY数据传输模式,阐述了系统结构和工作原理,最后对如何利用TS101的FLYBY接口提高数据采集、存取效率和数据系统的逻辑控制进行了详细的论述。     

Platinum Binuclear Complexes as Phosphorescent Dopants for Monochromatic and White Organic Light‐Emitting Diodes

Efficient blue‐, green‐, and red‐light‐emitting organic diodes are fabricated using binuclear platinum complexes as phosphorescent dopants. The series of complexes used here have pyrazolate bridging ligands and the general formula C^∧NPt(μ‐pz)₂PtC^∧N (where C^∧N = 2‐(4′,6′‐difluorophenyl)pyridinato‐N,C^2′, pz = pyrazole ( 1 ), 3‐methyl‐5‐tert‐butylpyrazole ( 2 ), and 3,5‐bis(tert‐butyl)pyrazole ( 3 )). The Pt–Pt distance in the complexes, which decreases in the order 1 > 2 > 3 , solely determines the electroluminescence color of the organic light‐emitting diodes (OLEDs). Blue OLEDs fabricated using 8 % 1 doped into a 3,5‐bis(N‐carbazolyl)benzene (mCP) host have a quantum efficiency of 4.3 % at 120 Cd m^–2, a brightness of 3900 Cd m^–2 at 12 V, and Commission Internationale de L'Eclairage (CIE) coordinates of (0.11, 0.24). Green and red OLEDs fabricated with 2 and 3 , respectively, also give high quantum efficiencies (～ 6.7 %), with CIE coordinates of (0.31, 0.63) and (0.59, 0.46), respectively. The current‐density–voltage characteristics of devices made using dopants 2 and 3 indicate that hole trapping is enhanced by short Pt–Pt distances (< 3.1 Å). Blue electrophosphorescence is achieved by taking advantage of the binuclear molecular geometry in order to suppress dopant intermolecular interactions. No evidence of low‐energy emission from aggregate states is observed in OLEDs made with 50 % 1 doped into mCP. OLEDs made using 100 % 1 as an emissive layer display red luminescence, which is believed to originate from distorted complexes with compressed Pt–Pt separations located in defect sites within the neat film. White OLEDs are fabricated using 1 and 3 in three different device architectures, either with one or two dopants in dual emissive layers or both dopants in a single emissive layer. All the white OLEDs have high quantum efficiency (～ 5 %) and brightness (～ 600 Cd m^–2 at 10 V).     

数字电子设备电磁干扰与电磁兼容

本文扼要分析了产生电磁干扰的因素,并探讨了克服电磁干扰的对策.     

高校摄录编播设备数字化改造探析

为了用有限的资金建设一个高标准、现代化的适合高校现代教育技术需要的数字化摄录编播系统，结合实际，详细介绍一种适合高校重大事件记录、课件制作及教学片拍摄、可以满足高校多种需求的数字化摄录编播设备的合理化配置。     

Determination of molecular weight and molecular sizes of polymers by high temperature gel permeation chromatography with a static and dynamic laser light scattering detector

Flow-mode static and dynamic laser light scattering (SLS/DLS) studies of polymers, including polystyrene, polyethylene, polypropylene and poly(dimethylsiloxane) (PDMS), in 1,2,4-trichlorobenzene (TCB) at 150 °C were performed on a high temperature gel permeation chromatography (GPC) coupled with a SLS/DLS detector. Both absolute molecular weight (M) and molecular sizes (radius of gyration, R_g and hydrodynamic radius, R_h) of polymers eluting from the GPC columns were obtained simultaneously. The conformation of different polymers in TCB at 150 °C were discussed according to the scaling relationships between R_g, R_h and M and the ρ-ratio (ρ=R_g/R_h). Flow-mode DLS results of PDMS were verified by batch-mode DLS study of the same sample. The presented technique was proved to be a convenient and quick method to study the shape and conformation of polymers in solution at high temperature. However, the flow-mode DLS was only applicable for high molecular weight polymers with a higher refractive index increment such as PDMS.     

光传送网中的关键光器件

光器件是光传送网的基础单元之一，本主要综述光传送网中的关键光器件：光源与光探测器、光波分复用/解复用器、光放大器、色度色散与偏振模补偿器及光开关等。比较了各种光器件的主要技术方案，特别针对的是已实用化的技术方案。最后讨论了光器件的尺寸小型化、微型化以及多功能集成等发展趋势，介绍了光器件的集成方式如：传统分立光器件的集成，平面光波导集成，以及混合集成等。     

ADT75型数字温度传感器的原理和应用

介绍ADT75型数字温度传感器,它将温度传感器、12位A/D转换器、可编程温度越限报警器和SMBus/I2C总线接口集成在一个芯片中.详细描述ADT75的功能、原理及使用方法,给出该电路在温度控制系统中的应用.     

数字电子技术实验教学的改革实践

数字电子技术是一门实践性较强的课程，也是电气信息类专业必修的重要课程之一。我们在数字电子技术实验教学中进行了大量的改革实践，收到了较好的实验教学效果。通过实验内容、实验方法、实验课程管理等几个方面的建设，提高了学生的学习主动性、积极性，培养了学生的综合能力及创新能力，进而提高了实验教学质量。     

地震数据采集系统延迟时间研究与分析

文章分析了影响地震采集系统延迟时间的因素,并根据系统延迟的理论对产生的原因进行了论证.同时对实际生产中的测试方法进行了阐述研究和分析,提出了新的测试方法,并结合实际生产提出了合理性建议.     

数字视音频传输中的光纤通道网络技术

随着数字技术的发展，数字视音频数据量迅速增加，这就需要一种新的视音频网络技术来提高数字视音频文件传输的速度，数字视音频的光纤通道网络技术解决了这个难题。主要介绍数字视音频的光纤通道网络技术的性能、优势以及网络环境建设。