变电运行故障处理维护技术分析

自从改革开放以来,我国电力事业的发展速度大大加快.时至今日,我国电力事业的发展已经趋于成熟,电网布置也遍布全国.电力系统的运行难免会出现一些变电运行故障,如何及时做好变电运行故障处理维护工作,这是对电力事业工作人员的考验.针对于此,本次研究尝试探讨了变电运行故障处理维护技术,本文分析了变电运行故障处理维护工作的作用,同时提出了变电运行故障处理维护的相关技术.在文章的最后,对本次研究进行总结.     

基于故障状态演化的高速公路机电设备智能维护系统设计

以往高速公路机电设备智能维护大多采用人工检测的形式,未能详细计算机电设备中的故障数据、准确判断故障类型。为此,针对当前高速公路机电设备智能维护的需求,设计基于故障状态演化的高速公路机电设备智能维护系统。在高速公路机电设备智能维护中,故障监测模块融合物联网传感器技术、电子设备控制技术和数据分析处理技术,实现智能感知、网络传输、信息整合以及应用服务功能,并采用基于故障状态演化的故障预测诊断混合模型实现高速公路机电设备故障检测,将检测结果传输至机电设备智能维护模块,按照相应类型选择维护程序,完成高速公路机电设备智能维护。经验证,该系统修复率大于99.98%,且维护效率和鲁棒性高,可应用于高速公路机电设备智能维护工作中。     

计算机网络故障分析与维护探讨

计算机网络技术的出现改变了人们的生产、生活和工作方式。文章主要分析了计算机网络故障类型及维护措施。研究表明:计算机网络故障主要有:线路故障、服务器故障、病毒故障及网卡故障等,并提出减少计算机网络故障的一些维护措施,旨在为今后的研究提供理论基础和技术指导,使计算机网络健康稳定运行。     

对光传输设备故障分析及维护的探讨

本文结合光传输设备维护工作经验的基础上,说明了光传输设备的基本组成,分析了光传输设备故障产生的原因,提供了光传输设备维护工作的技术建议,希望能够对行业提高光传输设备的故障排除和维护工作有所帮助。     

网络通讯技术中软件故障讨论

网络通讯技术已经应用于各行各业,在生活中起到举足轻重的作用。通讯设备会出现各种各样的故障,软件故障是其中的一大类别,本文列举了一些常见的软件故障,分析了处理故障的策略和具体方法,并给出了一些具体维护措施,以期为网络维护人员解决网络问题提供参考。     

DAM发射机预防检查维护的技术研究

近年来,DAM发射机在广播行业中得到了广泛的应用,其在经济性和日常维护方面都具有明显的优势。要想保证DAM发射机能够长期稳定工作,就需要对DAM发射机实行预防性检查维护工作,以预防故障为主。本文主要阐述了DAM发射机预防检查维护技术以及故障处理技术,并就DAM发射机日常维护中的注意事项进行了探讨。     

配电变压器运行及故障检修技术分析

近些年我国电力系统取得了突出的成就,根据配电变压器运行管理的具体要求,需要从实际情况入手,做好故障检查和维护工作,按照技术流程要点进行.本次研究中以配电变压器运行维护作为基础,对故障检修技术进行分析.     

输电线路的维护与故障应对策略分析

阐述输电线路维护及故障排除的特点，提出输电线路维护措施，探讨输电线路故障排除技术和故障排除策略，从而保障电网输电线路的可靠运行。     

计算机网络通讯技术故障分析与处理

计算机网络目前在我国迅速发展,但网络通讯技术仍存在着很多技术故障,而定期进行检查维护、改善硬件环境、加强计算机管理都是针对计算机网络通讯技术故障的有效处理措施。本文探讨了如何分析和处理计算机网络通讯技术故障,保障计算机网络通讯的安全平稳运行。     

TSD-10中波全固态发射机使用维护及故障处理

作为发射机日常管理中的重要组成部分,合理的使用维护与有效的故障处理对于保证TSD-10中波全固态发射机的正常运行具有重要作用。本文首先介绍TTSD-10中波全固态发射机的日常维护措施,然后具体探讨了发射机的故障类型及处理方式,以期为相关技术与维护人员提供参考。     

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.