基于开源技术的WoMANO技术架构研究

国内外有影响力的标准组织近年来纷纷成立专门的工作组来开展NFV的相关标准研究。文章对NFV标准组织近几年的研究成果以及NFV标准组织的最新进展进行了介绍。NFV架构主要包括NFVI、VNF和MANO三大功能模块以及子功能模块,NFV在增加通信网络灵活性的同时对网络管理和编排提出新的功能需求。基于欧洲电信标准组织网络功能虚拟化架构、功能、最新标准现状和业界进展,针对NFV管理和编排具体需求,文章分析NFV中的网络服务编排管理模块、虚拟化网络功能管理模块、虚拟资源管理模块、视图管理模块及其开源支撑技术,结合中国联通网络业务特点,给出一种Wo MANO技术架构,为运营商开展NFV实践提供技术参考。     

网络功能虚拟化中的网络转发性能优化技术研究

网络功能虚拟化(NFV)采用软件转发技术实现,其网络转发性能受到各类运营商关注.重点分析了NFV技术中影响转发性能的关键因素,讨论了多项开源转发性能优化技术实现方法,提出了NFV中性能优化整体解决方案,最后测试验证了部分开源技术对转发性能的提升能力,为NFV技术推广提供了重要参考.     

NFVO标准和实践

网络功能虚拟化(NFV)是未来网络发展的重要趋势,也是目前全球各大标准组织和开源社区的工作重点.网络功能虚拟化编排器(NFVO)是编排和管理NFV网络的核心功能,也是运营商和设备厂商关注的焦点.全面梳理了NFVO相关的国际国内标准组织及开源项目的最新研究进展,阐述了中国电信股份有限公司北京研究院联合江苏分公司研发的NFVO系统架构和关键组件,并基于现网实践指出NFVO在未来研发和部署中的挑战.     

以三大业务为NFV切入点中国移动构建新型网络

2012年,13家运营商在ETSI(欧洲电信标准协会)发起NFV倡议,同年发布NFV白皮书.作为推动NFV成熟的重要运营商,中国移动一直积极推动NFV产业链发展,推进标准和开源成熟,主动迎接网络转型和演进.     

基于开源OpenStack架构的NFV基础设施云平台

针对NFV基础设施管理问题,分析NFV和开源云平台标准与业界现状,分析ETSI NFV MANO管理特点,借助开源技术,给出一种基于OpenStack的NFV基础设施云平台架构,并对关键技术进行分析.     

NFV开源技术

NFV是运营商网络重构的核心组成部分,开源则是加速NFV发展的重要动力.如何利用开源技术推动NFV在电信网络的应用,是运营商在当前面临的重大课题.以国际标准化组织ETSI提出的NFV参考框架为参考,全面梳理了NFV开源技术体系,重点对NFVI、VNF、MANO等领域的主流开源项目的工作背景、技术路线、发展方向进行了深入剖析,并结合运营商实际情况指出了相关开源技术在现网引入时面临的技术瓶颈、解耦障碍和运营难题,提出了相应的工作建议.     

从概念探讨到商用落地SDN/NFV进入演进加速期

经过十年的发展,SDN/NFV已经逐渐落地成型、真正进入了商用部署时期.全球几乎所有的主流运营商都在进行SDN和NFV的研究和部署,以在节省更多的成本同时提供更加灵活优质的服务,在日前召开的“2017全球SDNFV技术大会”上,来自开源组织以及部分海外电信运营商代表,纷纷展示其最新的网络转型部署计划和实践情况.     

基于开源技术的NFV平台架构研究

NFV涉及包括底层基础设施资源、虚拟网络功能、综合管理、业务编排、网管等诸多领域,搭建一套完整的NFV平台是一个较为复杂的系统工程。文章参考ETSI NFV整体架构,分析NFV各模块的开源支撑技术,结合运营商网络业务特点,提出一个利用开源平台搭建NFV实验平台的通用架构,为今后开展相关NFV验证及测试提供支撑。     

CORD应用与发展

CORD开源项目提供了面向未来网络演进的一种基于SDN/NFV技术的综合接入边缘云的参考实现.在分析CORD项目对现有CO和DC的影响的基础上,研究了CORD核心架构和协议栈.分析了如何在面向5G的移动应用场景(M-CORD)中应用CORD架构并实现自动性能监测和系统调整的参考解决方案.最后给出了CORD与其他开源软件之间潜在的集成应用解决方案.     

SDN/NFV标准及开源项目发展现状研究

软件定义网络和网络功能虚拟化已成为全球产业界高度关注的网络热点技术,其所体现的"开放性、虚拟化、可编程"的特征对整个信息网络乃至ICT产业发展产生了深远的影响。文章梳理当前SDN和NFV标准的发展现状,对SDN和NFV相关开源项目进行跟踪,最后对SDN和NFV标准的发展趋势做出展望。     

Technology innovation and process integrations for sub-100nm gate patterning

This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.     

White organic light-emitting devices based on fac tris（2- phenylpyridine） iridium sensitized 5,6,11,12-tetraphenylnap -hthacene

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.     

Complete approach to automatic identification and subpixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

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.     

A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.     

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.     

Optical vibration and deviation measurement of rotating machine parts

It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer （LDV）.