卫星地球站预警信息群发系统原理与构建

笔者用VB开发了一套预警信息群发系统,该系统第一时间向相关部门发布预警信息,让他们提前做好安全播出应急措施。同时通过该系统可以查询主要播出设备工作状态、接收信号质量。本文论述其功能特点、实现方案、系统的组成、工作原理、硬件的配置及软件流程设计。     

基于大数据采集的播出监管系统设计与实现

播出监管系统在当前电视播出系统的的应用越来越广泛,大量数字化的技术设备都需要统一规范的监管.监管系统利用大数据技术采集海量设备的软件硬件信息,并分析成图形、文字、列表等为用户提供设备运行状态和故障预警信息.通过采集被监管设备的底层信息统一转化为直观的预警报警信息,监管系统为技术运维人员解决播出系统问题提供了便利.本文主要介绍贵州广播电视台的播出监管系统在系统服务管理方面的设计思路和使用方法.     

广播电视监测预警与指挥调度一体化系统的设计和实现

广播电视预警信息发布系统,是广电行业内快速发布安全播出预警信息的全国性系统,目前,在全国范围内已经建立了以国家广电总局为中心,三十一个省级分中心,覆盖全国的广播电视预警信息发布网络.江西省广播电视安全播出预警信息发布系统是由省局建设,江西省广播电影电视监测中心进行维护管理的系统,共配置了110个预警显示终端,568个手机终端,2005年5月正式投入使用.多年来,全省安全播出预警信息发布系统,在提高省安全播出工作效率以及处置突发事件中发挥了重要的作用,成为了全省安全播出管理工作中不可或缺的技术手段.     

安全播出预警发布系统信息接收屏的维护与故障处理

安全播出预警发布系统是确保全国广电系统"有效防范、快速响应"突发事件的重要信息系统,安装在全国各级广播电视播出单位的安全播出预警发布系统信息接收屏(以下简称预警屏)是接收和反馈总局和省局调度指令和预警信息的重要信息终端.本文介绍了预警屏的基本组成结构,重点对预警屏的维护注意事项和常见故障处理方法进行了描述.     

对广播电视安全播出预警发布系统维护管理的思考

预警发布系统主要完成向省级调度指挥机构、总局直属播出单位和全国县级以上播出单位迅速发布安全播出预警信息的功能。本文详细介绍了预警发布系统的作用、运行、常见故障及维护。并结合新疆实际叙述了预警发布系统在新疆这种地域广、条件差、管理难度大的区域中发挥的作用,并提出自己的一些思考。     

宁夏广播电视网络有限公司监控系统简述

统一监控系统主要是利用机房现有的节目应急备份切换系统,对传输信号进行监测,对机房关键设备资源占用情况进行预警,对机房工作环境进行监测,保证了有线数字电视的安全播出.     

安全播出环境监测系统的设计与搭建

卫星通信质量易受到气候、天体等因素的影响,对于地球站来说,随时掌握安全播出环境,对可能影响播出信号的气候因素进行提前预警,可以进一步确保节目传输工作的安全、稳定、可靠.本文从安全播出环境监测系统的构想与设计出发,阐述了系统的搭建思路、技术特点与系统构成,对于提高安全传输发射保障能力进行了探讨.     

基于图像处理技术的实时频谱监测预警系统设计与开发

载波信号对于地球站安全播出工作而言是一个非常重要的指标,但是目前运行的监测系统对于这个指标的预警并不完善,没办法准确的播报出异常的详细情况,就此问题,作者根据本站实际情况,创新地使用了图像处理技术来实现载波预警的功能.本文主要对载波预警系统的设计与开发进行了详细介绍.     

基于多源数据融合的广播电视监测系统智慧化升级

伴随着广播电视行业的繁荣发展,各级广播电视主管部门提高了中短波、调频、有线数字电视、地面无线数字电视的监测工作要求。原有的技术系统出现了数据采集样本少、播出事故判别准确率低、预警信息格式不统一、设备状态监控实时性差、系统重建成本高等问题。基于多源数据融合的思想,利用网络爬虫、数据分析、音视频判别等技术,构建具有数据采集、处理、统计、展示等功能的新一代监测系统。实践证明,该系统具有数据采集数量多、播出事故识别准确、预警信息可信度高、可扩展性强和维护方便等优点,有效提升了广播电视监测工作的效率。     

运用大数据手段运维视频播出服务器

视频播出服务器是广电播出系统的核心设备,是播出系统运维的重点,视频服务器的主要运维手段是通过分析日志来监控状态及故障分析,还无法做到故障预警。通过引入大数据分析手段,对视频播出服务器的日志进行不间断采集分析,可以降低人工劳动强度,通过积累典型事件的日志数据,可以做健康趋势分析并对典型故障作出预警。通过大数据分析手段,可以实现视频播出服务器的智能运维,进一步加强播出安全管理。     

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.