关于青藏铁路公司数据中心建设方案的思考

铁路信息化建设已经成为推动铁路快速发展的关键力量,青藏铁路公司数据中心建设包括存储虚拟化、服务器虚拟化、网络虚拟化以的建设。在尽量不对上线业务造成影响的情况下,将搭载在物理服务器或部分虚拟化服务器上的业务整合到一个统一的大虚拟化计算资源池中。     

服务器虚拟化技术的应用

随着计算机技术的发展虚拟化技术也应运而生,服务器虚拟化将系统虚拟化技术应用于服务器上,具有节省能源、节省空间、最大限度保证业务连续等优势。本文从服务器虚拟化技术的应用出发,围绕VMware虚拟化技术探讨了服务器虚拟化的原理概述,以在供电企业中服务虚拟化技术对原有生产工作的影响为重点分析了服务器虚拟化的相关应用和虚拟化技术在信息的化建设中发展前景。     

高性能计算场景服务器性能测试方法标准解读

针对当前国内服务器行业高性能计算领域评测标准缺失的情况,分析了《服务器应用场景性能测试方法高性能计算》,重点阐述测试框架和典型行业测试用例,为完善服务器分场景评测提供参考.     

数据中心与虚拟化技术

虚拟化网络技术是指在一个物理网络上同时运行多个互不干扰的逻辑网络,各个逻辑网络都各自有着特定的拓扑及路由算法.通过对网络设备的虚拟整合,实现网络流通量路径的分离,完成网络路径的虚拟化,提高关键业务在虚拟化网络中的服务保障.服务器虚拟化技术通过运用虚拟化的技术充分发挥服务器的硬件性能,能够在确保企业投入成本的同时,提高运营效率,节约经济成本和空间浪费.文中对虚拟化的网络技术进行了介绍与分析,介绍了虚拟化网络技术的概念及原理,讨论了VMware esxi服务器虚拟化、VMware vSphere 关键技术,及实现服务器虚拟化所需要的主要组成元素及技术.     

基于虚拟化的考试服务器性能测试

目前以计算机技术为基础的考试系统应用广泛,考试系统的安全性、稳定性有待提升。本文以学院计算机基础考试系统为研究对象,进行了基于VMwave软件的虚拟化考试服务器性能测试。文中提出了性能测试方法,选择了测试工具,比较了测试结果。实验表明利用虚拟技术构建的考试服务器能够正常运行,且稳定性和安全性得到虚拟化技术支持。     

服务器虚拟化技术在医疗业务信息化建设中的运用

随着科技的发展,服务器虚拟化技术在医疗业务信息化领域的运用,大大提高了医疗行业的服务水平。文章围绕医疗业务信息化中虚拟化设计流程及关键环节展开讨论,并深入探讨了医疗业务信息化建设中服务器虚拟化技术的运用要点,以供参考。     

广电虚拟化平台性能测试研究

虚拟化平台已成为广电业务发展的必然趋势。当前,省市级广播电视系统,特别是融合媒体系统,都通过虚拟化平台提供服务。虚拟化平台性能的优劣对广播电视业务效率的高低起重要作用。本文通过一种虚拟化平台性能测试工具对虚拟化平台的性能评估,进而对虚拟化平台基准性能测试做了一个思考。     

浅谈数据中心服务器虚拟化的应用

随着企业的高速发展,信息化应用水平的不断提高,业务系统越来越多,导致近两年服务器数量急剧攀升,公司面临着机房空间、电力供应紧张等因素困扰。企业中不断增加的服务器设备在方便工作的同时也带来了管理复杂化、成本扩大化的问题。虚拟化技术简化了系统的部署,减少了服务器的投入,提高了服务器使用效率。笔者结合自身实际工作经验,从服务器虚拟化技术的应用出发,以VMware为例,探讨服务器虚拟化的实践以及虚拟化技术在信息化建设中的前景,希望对数据中心服务器虚拟化管理研究提供一定的参考价值。     

浅谈数据中心服务器虚拟化的应用

随着企业的高速发展,信息化应用水平的不断提高,业务系统越来越多,导致近两年服务器数量急剧攀升,公司面临着机房空间、电力供应紧张等因素困扰。企业中不断增加的服务器设备在方便工作的同时也带来了管理复杂化、成本扩大化的问题。虚拟化技术简化了系统的部署,减少了服务器的投入,提高了服务器使用效率。笔者结合自身实际工作经验,从服务器虚拟化技术的应用出发,以VMware为例,探讨服务器虚拟化的实践以及虚拟化技术在信息化建设中的前景,希望对数据中心服务器虚拟化管理研究提供一定的参考价值。     

基于VMware vSphere的山东省气象局服务器虚拟化平台

利用服务器虚拟化技术集约、灵活、高效率和低成本等优势和特点,省局采用了以VMware vSphere为主的技术架构,搭建了山东省气象局服务器虚拟化平台.平台按照物理层、虚拟化层和管理层三层建设模式,配置了计算服务器、存储和交换机等设备,并面向部分业务单位开展了业务试运行.目前平台总体运行较为稳定,效果良好.     

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.     

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.     

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.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first