基于Docker云平台的管理系统构建及分析

主要对Docker云平台进行了研究.首先,从容器化、容器技术的发展历史、Docker依赖的技术和Docker的应用场景4个方面阐述了容器技术的基础知识;其次,从Docker的优势、Docker在云计算中的应用现状和Docker给云计算带来的变化等方面论述了云计算与Docker的关系:然后,在Ubuntu上部署了Docker的管理平台,即Shipyard,并在该平台上部署了手写服务;最后,为了验证该平台的可用性和Docker的高性能、低开销的特性,本设计还进行了3个测试实验,即物理机和Docker的性能对比、Docker数量对系统的性能影响和不同平台(物理机、Docker、KVM)的性能对比实验,测试结果和预期相吻合.     

数据库负载自适应技术的研究

数据库系统的负载自适应是一个性能管理过程,在这一过程中自主数据库系统自动地控制和过滤负载,并有效地使用数据库系统资源来满足网络应用的性能要求(SLA).文中将针对负载自适应技术开展研究.提出一个改进的数据库负载自适应体系结构框架WAAD(Workload Adaptation Architecture for DBMS),依据该框架初步搭建了一个测试平台QS(Query Scheduler)并做出了测试,测试结果表明该框架起到了提高网络应用性能的作用.     

云计算仿真工具分析与比较

云计算技术已经越来越得到人们的关注和接受。但是由于异构真实的云计算环境下的各种应用服务都有着不同的配置、部署条件和要求,所以如果要进行重复、可伸缩的试验来对不同应用模式进行量化、评价是非常困难的。因此,云计算环境的模拟仿真工具应运而生。在介绍目前比较流行的云计算仿真工具的基础上,对它们的架构、功能、性能进行了分析与比较。     

云环境下动态装配软件开发方法中的关键技术研究

云计算技术不断发展,在传统软件研发模式下,受制于服务器环境中致使研发与部署困难,软件系统可维护性及扩展性差,难以满足云环境中软件开发的需求,本文提出云环境下动态装配软件开发方法,在云计算环境中,软件开发人员通过云计算获取云组件IT资源,根据开发软件需求,在本地或云提供的虚拟机利用云组件进行组合装配完成程序设计,并通过中间数据引擎从云服务器动态加载与提取数据,形成一种基于云服务驱动、以B/S架构技术为架构模式的新型软件开发方法.     

软件定义安全模型与架构浅析

目前大多数企业已经部署了基于策略访问控制的信息安全防御体系,但是随着云计算环境部署和网络攻击技术的发展,安全正成为云计算环境下亟待解决的重要问题,诸如能轻而易举地绕过传统防火墙、突破基于黑/白名单与特征匹配的安全防御机制等高级持续性攻击,给传统安全体系带来了新的挑战.分析了传统紧耦合安全防御体系在虚实结合网络环境下面临的问题,提出了软件定义安全的模型及其框架下的关键技术,实现了虚拟的和物理的网络安全设备与它们的接入模式、部署位置解耦合,为企业云计算环境下自适应的主动安全防护提供了有益的探索.     

基于SaaS模式共享模型的一卡通扩展技术

为了弥补传统中心化系统中存在的技术短板,需要借助区块链与云计算技术来解决数据收集、存储与内容扩展的问题。以某智能一卡通管理系统为例,针对软件即服务(software as a service,SaaS)模式共享模型进行研究,提出了利用区块链和云计算技术来解决数据共享和安全性问题的方案。基于区块链和云计算技术的一卡通扩展技术,通过构建资源共享与云计算分布式架构,对设计方案进行了测试与性能分析,验证了其在实际应用中的有效性和可行性,对推动云计算时代下的信息化建设具有重要意义。     

浅谈云计算技术及其在智能油田的应用

本文主要介绍了云计算的概念和发展状况,并对云计算的部署模式、特征、关键技术和安全进行了综述,从而使读者对云计算技术有一个初步的了解和掌握.最后,探讨了云计算在智能油田中的作用.     

基于SFC的业务路径选择算法

产业界正在推进SFC(service function chain,业务链)技术发展,以实现云网融合的新型业务部署模式.业务路径选择策略是业务链的核心技术,直接影响网络性能与业务体验.针对现有业务路径选择策略存在的单一目标缺陷,创新提出并仿真验证了一种基于时延和负载的最小权重法,优化网络资源分配,提升业务链处理性能,为运营商未来网络和资源部署提供技术参考.     

迎接云计算带来的挑战

1 引言 云计算是IT行业中最热门的方法之一.尽管它在节约成本、提高效率和敏捷性方面具有巨大的潜力,但它也会带来一些新的挑战.诸如“跨越鸿沟”和“技术成熟度”等市场采纳模式已充分表明,云计算正在获得认同并且其应用进程也在不断加快.这些现象还表明,在部署云计算环境的过程中,越来越多的机构将会面临挑战,甚至可能遭遇失败.云...     

云计算虚拟环境的形式化安全验证

云计算是一种新兴的计算、存储资源使用模式,由于具备低成本、高效率等优点,得到了业界的广泛应用,但安全性仍然是云计算推广最大的障碍之一。虚拟化作为云计算的关键技术,其安全水平直接影响云环境的安全性,目前对云计算虚拟环境多采用传统的覆盖式验证方法,无法彻底解决正确性问题。文中通过结合形式化方法中的模型检测技术,经过配置采集、需求分析和性质检测3个阶段对虚拟化安全性质进行高覆盖率验证,提供了一种对云计算环境进行安全评估的可行思路。     

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。     

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.     

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）.     

INTEGRATION OF OPTICAL AND WIRELESS NETWORKS

正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must     

社长序言（英文）

正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta-     

云计算专题（英文）

正Cloud computing is a novel computing paradigm that utilizes remote cloud resources to achieve a high-performance computation.Cloud provides infrastructure,platform and software as different on-demand services.China has made remarkable progress in cloudbased products and operating system technology.The government,enterprises and research institutions are all active in the development of cloud computing-related projects.Despite the progress,many important problems     

Call for Papers—Feature Topic,Vol.12,No.3,2015

正Smart Grid Communications The electric power industry is undergoing profound changes as the industry aims to capture the promise of a smart grid for a sustainable energy future.Enabled by the advanced sensing devices such as Phasor Measurement Units(PMUs),increasingly powerful