基于云计算架构的虚拟化研发平台构建与实现

主要研究和分析云计算架构下的虚拟化技术,根据企业在业务发展过程中所面临的服务器利用率偏低、存储丢失及数据泄露等问题,深入研究桌面虚拟化在企业研发环境中的可行性,提出应用解决方案。采用CITRIX的桌面虚拟化产品来构建和实现基于云计算架构的虚拟化研发平台,利用服务器虚拟化、虚拟桌面等一套解决方案帮助企业解决系统维护难、安全管理难、资源利用难及成本控制难的问题。     

云计算虚拟化安全技术研究

近年来,伴随云计算服务的发展和普及,其安全问题也逐渐凸显.而其中的虚拟化安全则是云服务商和安全厂商关注的重点.梳理了云计算虚拟化环境中主要面临的安全威胁,提出了云计算虚拟化安全技术架构,包含基于KVM的虚拟化安全技术框架和虚拟化集中管控平台两个部分,并依照技术架构开发了“沃云”安全管理平台原型系统,对云计算虚拟化安全技术架构进行了理论验证.     

思杰桌面虚拟化架构在企业的应用

桌面虚拟化作为"云计算"的关键技术之一,以其低成本、低功耗、高安全、易管理等特性成为发展最快、最具应用前景的新技术。文章从实施背景、实施目标以及解决方案等多个方面介绍了思杰桌面虚拟化架构在企业中的应用,该架构可作为桌面管理解决方案,在企业中推广应用。     

安全桌面云计算架构解决方案

当前,很多企业和行业用户纷纷采用桌面云计算技术改造或建设自身的信息化基础设施,以期提高信息系统治理水平,减少信息外泄的途径。随着虚拟化等关键技术的引入,桌面云计算架构也面临着新的安全风险,针对桌面云计算架构所面临的安全风险提出了较为完整的解决方案,远程用户可以基于此随时随地利用有线/无线等多种网络接入方式访问后台数据中心,如同在本地一样操作各类业务。     

中国电信明确2013“云”发展规划 加速自身信息化转型

在已有云计算技术架构基础上,运营商可以实现企业信息化的多元化业务使企业信息化进程跨上新台阶。云计算是中国电信战略转型的重要方向之一。中国电信从2009年开始推进云计算的深入发展,近两年进行了多方向的IT、IDC云计算技术现场试验,将计算虚拟化、存储虚拟化、虚拟桌面等技术在企业内部的IT、办公桌面等领域进行了规模应用。     

英特尔讲述云计算数据中心基础架构体系

在2010年12月9日的英特尔架构开放数据中心媒体训练营上,英特尔(中国)有限公司服务器平台产品经理张振宇表示:"云计算可以简单地理解为虚拟化+管理+自动化." 云计算,其实就是一个自动化和资源动态的可扩展.张振宇表示,如果把云计算看成一辆车,车要跑起来必须要有轮子,这个轮子是网络虚拟化、存储虚拟化、服务器虚拟化,桌面虚拟化.     

基于云计算的虚拟技术在工商信息系统中的应用

基于云计算的虚拟化技术日趋成熟,虚拟桌面和虚拟应用平台作为热门的虚拟化技术,在资源集中调配、软件快速部署及安全性方面有巨大优势。无锡工商行政管理局在虚拟桌面和虚拟应用的基础架构上结合工商行政管理部门信息系统的实际情况,建立了工商内网和移动监管虚拟环境。实验结果表明,基于云计算的虚拟技术在原有软件无需任何改动的情况下,在内网办公和移动监管中都得到了较好的应用,减轻了管理员工作量,具有更高的资源利用率和安全性。     

云计算的虚拟化安全问题

随着云计算的发展,云计算的安全问题越来越受到关注。本文全面分析了云计算中与虚拟化安全有关的各类问题,阐述了虚拟化安全的研究现状并提出了未来发展方向。文中先介绍了虚拟化角度下的云计算架构,然后介绍了虚拟化技术,重点介绍了虚拟化安全问题和研究现状,接着以Xen平台为例,介绍了Xen的虚拟化安全问题,最后对未来的发展进行了展望。     

基于KVM的桌面虚拟化架构的应用研究

本文在服务器虚拟化技术的基础上,提出了一种基于KVM服务器虚拟化技术的桌面虚拟化架构,论文详细探讨了该桌面虚拟化架构系统的设计与实现过程,并重点研究了KVM所依赖的硬件辅助虚拟化技术的实现原理。该架构可作为桌面管理解决方案,在企业中推广应用。     

以虚拟化技术为基础的云计算平台设计探析

虚拟化技术作为云计算的基础支撑底座,为云计算平台的操作灵活性、业务连续性、资源利用率和安全防护等提供了有力的支持。本文介绍了虚拟化技术的基本概念和原理,对基于虚拟化技术的云计算平台特性进行了分析,探讨了如何搭建基于虚拟化技术的服务器云及云计算平台架构的结构系统,总结出虚拟化技术在云计算平台中的优势和应用前景,希望通过探析虚拟化技术在云计算平台中的应用,能为云计算的融合发展和应用提供有益的借鉴和参考。     

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.