基于P2P网络之上移动agent的Web服务发现机制

分析了传统服务发现机制存在的问题，针对移动嵌入式环境，提出了基于P2P之上移动agent的Web服务发现机制，讨论了其体系结构和工作模型设计的关键技术。     

Optimal design of Service Overlay Networks with economic and performance constraints

In the last years, Service Overlay Networks (SONs) have emerged as a promising means to address some of the issues (e.g. end‐to‐end QoS) affecting the current Internet and to favor the development and deployment of new value‐added Internet services. The deployment of an SON is a capital‐intensive investment, since bandwidth with certain QoS guarantees must be purchased from the individual network domains through bilateral Service Level Agreements. Thus, minimizing the economic cost of the logical end‐to‐end service delivery infrastructure is one of the key objectives for the SON provider. When a SON is aimed at end‐to‐end QoS provisioning, its topology must be designed so as to also satisfy the specific requirements of QoS‐sensitive applications. This paper deals with the problem of planning the SON topology in order to take into account both cost and QoS constraints. More specifically, the paper proposes a set of new algorithms for the design of an optimized SON topology, which minimizes the economic cost while simultaneously meeting bandwidth and delay constraints. A performance comparison among such algorithms is finally carried out. Copyright © 2009 John Wiley & Sons, Ltd.     

微信营业厅助力广电运营

社会化网络媒体高速发展,微信、微博等互联网社交媒介的崛起,为市场营销拓展了全新的传播渠道。广电运营商借助互联网平台,借鉴电信、移动以及其他商业微信公众号的经验,建设具有广电运营特色的微信营业厅,对于健全广电行业的客服体系,拓展客户支付渠道,扩大企业影响力有重要意义。     

云计算安全的多角度研究

云计算在部署、架构、运营、管理等方面与传统方式的差异给服务商和使用者带来了多个层面的安全挑战。文章针对云计算的不同架构,分析了所对应的安全风险和对策。从网络与信息系统的各个层次,对云计算的安全进行分析,并提出相应对策;从使用者的角度分析了在使用云服务时所需关注的云安全问题,并提出一些具体措施和建议,为云计算的安全部署提供参考。     

Burst scheduling for differentiated services in optical burst switching WDM networks

Optical burst switching (OBS) is one of the most important switching technologies for future optical wavelength division multiplexing (WDM) networks and the Internet. The model of differentiated services has been proposed to support quality of service (QoS) in the IP‐based Internet. It is also very important to have differentiated service support in OBS networks. When the burst scheduling in an OBS network is set up appropriately, network can support differentiated services. In this paper, we proposed a new burst scheduling scheme, called differentiated scheduling with identical priority offset time (DSIPO). In DSIPO, the same priority offset time is used for all the bursts destined to the same edge node regardless of their priorities. Differentiated services in terms of burst loss probability are achieved by processing the control packets of higher priority class bursts, thus reserving resources for their data bursts, more promptly upon their arrival than those of lower priority class bursts. Each intermediate (core) node can adjust the burst loss probabilities of various burst classes by choosing its own differentiated processing delay value for each priority class or its own differentiated processing delay difference value between any pair of adjacent priority classes. We model and analyse DSIPO in terms of the burst loss probability for each priority class with simulation validation. The performance of DISPO is evaluated by simulation. Copyright © 2004 John Wiley & Sons, Ltd.     

一种基于Web Service的虚拟化目录服务

给出了一种虚拟化目录服务结构,利用轻量级目录访问协议构建分布式目录服务,形成一体化的逻辑视图,通过访问控制策略在保持信息节点自治性的同时提供安全保障。文中基于Web Service封装目录服务,提供目录查询和管理的API,实现了跨平台和松耦合的资源访问方式。     

综合价值评估法在电力企业客户细分中的应用

对电力客户进行细分,有助于电力企业更好的了解客户,为电力客户制定差异化服务策略,最大程度满足客户需求,达到公司、客户双赢局面。因此文中运用客户综合价值评估方法建立了客户细分模型,构建了基于客户综合价值的细分指标体系,运用熵权法和专家经验相结合的方式得出指标的综合权重,最终得出细分结果,为供电局制定个性服务策略提供辅助支撑。     

云计算技术简述

云计算(Cloud computing)是当今IT界的热门技术,借助云计算,网络服务提供者可以在瞬息之间,处理数以千万计甚至亿计的信息,实现和超级计算机同样强大的效能。同时,用户可以按需弹性地使用这些资源和服务,从而实现将计算作为一种公用设施来提供的梦想。本文首先介绍了云计算的基本概念、组成部分、技术要点和国内外发展情况,然后分别从服务器虚拟化、存储虚拟化、应用虚拟化、平台虚拟化和桌面虚拟化五个方面重点介绍虚拟化技术同云计算之间密不可分的关系。     

基于本体论和标记图相似性的Web服务匹配算法

随着各种已有Web服务数量的日趋增加，如何快速发现可用的Web服务变得愈加重要。而随着语义Web服务的不断发展．Web服务发现也从原来的单纯采用关键字或简单分类逐渐转变为更多地使用语义信息。发现的关键在于匹配，而目前一些较成熟的技术，如OWL—S，采用了本体技术对Web服务进行描述．因此，文章提出了一个基于图相似性的本体匹配算法．通过构建Web服务本体并转化成标记图进行匹配．实现语义Web服务描述的匹配，从而准确快速地发现满足特定需求的Web服务。     

基于无线数据业务智能优化系统算法的研究与应用

针对业界GPRS/EDGE无线数据优化方法、算法不完善,工作效率低的问题,广西联通通过长期研究建立了一套优化经验方法和较适合现网的参数配置、算法,并将这套方法、算法应用到自主开发的无线数据业务智能优化系统中,使系统实现自动采集分析数据、自动提供优化方案、自动执行优化方案、自动生成优化报告功能,使无线数据业务优化工作朝着智能化方向迈进。