全业务电信运营商的IT服务管理实践探讨

本文分析了全业务电信运营商的IT服务管理面临的挑战,介绍了业界IT服务管理标准ITIL,提出了如何以ITIL为参考构建IT服务管理体系架构的主体内容,最后阐述了IT服务管理实施的方法与步骤。     

基于软件开发企业的IT月艮务规划及ITSM系统设计

国内IT企业（特别是软件开发企业）应用ITSM提高服务质量和市场竞争能力,仍然缺乏具有实际参考价值的成功案例。广东中望软件公司通过IT服务规划与实施项目,研究如何在软件开发企业中应用ITSM和ITIL最佳实践,提出了进行IT服务规划与实施的基本方法和应用模式,将IT服务规划的方法概括为PPMT模型,即对流程、组织、管理、工具四个方面进行设计,并将实施IT服务规划的策略概括为“管理分步、功能分期、观念重建、持续改进”,在IT服务管理成熟后,可将其他产品和业务整合到统一的IT服务管理体系中,最终实现“以服务为中心”的运营模式。     

信息系统运维服务管理探讨

本文通过对南车资阳机车有限公司(以下简称公司)现有IT信息系统运维管理现状的研究,结合ISO2000~1《IT信息技术服务管理体系标准》以及IT IL~2基础框架结构,从事件管理、问题管理、变更管理、服务台等方面探讨公司信息系统运维服务管理的解决方法和思路,并提出公司信息系统运维管理解决方案。     

浅谈视频IP传输的业务管理

服务管理是一种高层次的管理方法,能够高效分配和管理视频IP资源,进行方便的调度,从而实现对视频服务的优化。简要介绍基于IP网络进行视频传输业务管理的方法,基于此种方法构建的数字视频前端系统具有灵活、简便等优点。     

基于可用性分解结构的IT系统量化管理方法

IT系统的可用性是衡量其服务水平的重要指标,行业内应用ITIL等先进管理方法已经实现了成熟的定性管理,但在定量管理尤其是对于IT系统整体可用性的量化管理上,尚没有行之有效的方案,这主要是由于IT系统的非标准化导致量化管理难度较大。笔者提出一种量化管理方法,即通过创建IT系统的可用性分解结构,将整体可用性分解为标准的、容易测量的组件级可用性,并加以统计利用,达到完善可用性管理,提升服务水平和客户满意度的目的。     

面向服务的网络管理机制的建模方法

针对目前以面向对象的方法描述的网络管理机制仅仅关注管理操作细节的局限性,该文提出以服务的概念建模网络管理机制,扩展了对操作机制的商务过程特性、流程和策略等方面内容的描述能力。首先,通过建立网络管理功能、商务过程元素以及网络管理服务三者间的对应关系,使网络管理服务兼具操作细节和商务过程两方面的内容。然后,提出了包括服务接口、信息、语义、流程和策略的网络管理服务描述内容以及一种自顶向下和自底向上相结合的网络管理服务分析过程,并进行了举例说明。以面向服务的方法描述网络管理操作机制,符合面向客户和商务过程的电信运营策略,支持自动和灵活的运营过程,并可以有效指导网络管理及运营支撑系统的分析、设计、实施和集成。     

CMMB运维管理思路的探讨

CMMB系统自2008年奥运会正式投入营运以来,发展迅速,先后同中国移动集团和几大汽车集团形成战略合作伙伴,在众多领域扩展了大批用户群。CMMB系统商用之后,运营商如何保障持续提供安全优质的服务,成为运维工作的重大课题。本文从当前运维管理工作碰到的问题出发,结合当前运维管理的科学方法,对运维管理的思路进行了剖析,提出了CMMB运维管理思路的重点、方法和方向,并从面向客户服务的视角,探析了运维职责,人员培训,运维流程和服务管理等。     

初探电信业营业厅转型期的服务质量管理模式

文章根据潮州移动在建设营业厅服务质量的管理措施实践案例,探讨了如何应用科学的管理方法去管理营业厅服务质量,有效提升客户口碑,树立移动公司的优秀服务商形象。     

网络管理服务行为建模与实现

基于服务的软件开发方法,围绕网络管理服务系统形式化建模,通过对网管服务活动建模.实现了一个基于服务的网络管理系统.提出的网络管理服务系统建模方法可以较好的实现服务行为分析,确保系统的安全性、可靠性.     

基于软件网络的服务自动分类和推荐方法

对于服务管理与组合来说,服务分类和推荐方法至关重要,本文提出了SOS与服务自动分类方法,探讨了服务推荐方法的实现,并对其应用和平台工具开发进行了实例分析,旨在为相关研究和实践提供参考。     

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.     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

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