基于EPON的新型电力ONU的设计与应用

结合居民用电信息采集系统的需求及EPON技术的优点,设计了新的信息采集流程.详细介绍了一种具有实时信息采集功能的电力ONU的设计实现方法,其特点是采用了实抄与预抄相结合的软件方案.测试结果表明,系统平均响应时间在500ms以内.     

基于"大二层"的电力用电信息采集网络解决方案

目前用电信息采集业务数据承载网一般采用基于xSTP/RRPP协议的传统二层组网模式,虽在一定程度上满足了业务需求,但随着业务的深入开展,其可靠性差、扩展性不足等弊端日益凸显.文章提出了采用"大二层"网络技术,构建安全可靠、易扩展的电力用电信息采集网络解决方案,为用电信息采集网络的升级改造提供参考.     

智能用电信息采集管理系统优化策略探讨

随着我国经济的快速发展,人们的用电需求在不断增加,电网在我国也得到了广泛的发展与应用.但由于起步较晚,缺乏完善的基础设施,导致我国电力企业的用电信息采集与管理依然存有一定的缺陷和不足.因此,可在企业日常管理与服务时,引入智能用电信息采集管理系统对其进行相应的优化,能有效促进我国电力企业的服务及居民日常用电水平.近些年,在电力营销工作的不断发展中,企业经营理念与方式也逐渐受到影响,全国各地区的电力部分纷纷采用了智能用电信息采集管理系统,用来加强智能化配电台区与主站系统的建设.本文就智能用电信息采集管理系统的优化进行了相应的探讨.     

智能小区PON+PFTTH技术应用

电力光纤到户采用光纤复合低压电缆(OPLC),实现电力流和信息流的同步传输,是电力通信网在智能电网用电环节的延伸,是进行用电信息采集、智能用电双向互动、推动社会资源共享的必然选择。文章以"三网融合"建设为切入点,分析了电力智能小区采用光纤复合电缆构建的PON+PFTTH技术的网络,提出电力智能小区"三网融合"和"用电信息采集"业务解决方案,通过应用光纤复合电力电缆,解决了电力网"最后一公里"信息化建设问题,解决了智能电网终端用电环节信息化,自动化,互动化的需求。     

基于用电信息采集的用电监察管理应用研究

用电监察管理研究是国家电力应用管理标准逐步提高的重要体现.本文从我国当前电力资源管理全方位,自动化管理模式入手,对基于用电信息采集的用电监察管理应用进行研究,促进我国电力应用市场规范化程度进一步提升.     

230 MHz电力无线专网通信终端设计与应用

IoT-G(Internet of Things-Grid)230 MHz是国家电网公司建设电力无线专网制定的体制标准之一.针对配用电业务终端的接入需求,基于IoT-G 230 MHz电力无线专网研发了远程通信终端,分别开展了软硬件设计、定时同步算法优化,以及性能测试,并选取用电信息采集业务进行挂网试点验证,结果表明该远程通信终端的性能指标满足测试规范的要求,能够承载用电信息采集业务.     

基于物联网的用电信息采集系统

基于物联网的用电信息采集系统设计,以电力参数感知为核心,物联网技术为通讯方式,达到用户与用电物体的实时交互。文章分析了其系统架构,运行方式和硬件构成及软件构架,不仅实现了电力参数的实时感知,监控和分析,还有效的实现人与用电设备的交互,更利于电力用户选择合理的用电方式。     

用电采集成功率低的原因及提升对策

这些年以来,我国对电网的升级改造的力度不断加大,电网的自动化程度也越来越深,电力方面的企业的管理也越来越轻松,用电信息采集系统也随之不断升级发展.用户用电信息采集系统对于整个电力系统来说非常重要,在对电力系统的升级优化有着无比的优势,不过现在用电信息采集系统的技术还不够成熟,系统建设上面的经验不足,被现实中的各种原因影响,使得该系统在对电力信息采集的过程之中总是出现一些问题,导致采集成功率偏低,所以本文会对电力用户用电信息采集系统进行全面的分析,说明影响用电采集成功率的原因,并且笔者会提出一些建设性的意见来改变用电采集成功率低的现状,为提高用户用电信息采集的成功率贡献出自己的一份力量.     

用电信息采集系统通讯信道建设和研究

本文简要介绍了国内外用电信息采集系统建设的现状,重点通过对几种当前主流用电信息采集系统通信技术方案的比较分析,提出了适合各类电力用户的用电信息采集通信组网方案,确保科学组网、可靠通信。     

基于用电信息采集系统的抄核收新模式研究

随着电力系统信息化要求的不断提高,用电信息采集应用也逐渐深化,替代了传统的抄核收模式,促使电力营销抄核收工作逐步向信息化、自动化、互动化方式转变.本文针对传统抄核收模式的弊端和用电信息采集模式的优势引出了抄核收模式向信息化采集系统发展的必然趋势,并对用电信息采集系统下的抄核收管理新模式进行了阐述.     

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.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

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.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.