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。     

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。     

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.     

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.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

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.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.     

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.