Product catalogue management with Semantic Web Services

A key requirement of the Information Technology Infrastructure Library [1] is that services provided to customers are described in a service catalogue. Automating a service catalogue has many operational benefits, but can be complex and difficult to maintain. This paper looks at some of the issues and examines how the emerging technologies of the Semantic Web and Semantic Web Services can be deployed to address them.     

Building distributed management applications with the IETF ScriptMIB

Scalable and efficient management of today's fast growing networks requires distributed management systems. This paper introduces a classification of distributed management systems, followed by an overview of technologies for building such systems. One technology, the IETF Script MIB, is discussed in detail, including an implementation architecture and performance studies. Finally, application scenarios are presented, demonstrating how distributed management applications can be built by means of the IETF Script MIB     

A context management framework for supporting context-aware distributed applications

Service platform functions are enablers of adaptive communication services and applications that hide the heterogeneity of the infrastructure, manage personal reachability, manage implicit context, and adapt modality to the context. Furthermore, they can offer a diversity of services, whereby an optimal tradeoff can be made for end users in comfort, cost, security, and mobility. We consider the enablers of context-aware services in distributed environments and present a context management framework that is generic through its hierarchic ordering of context sources and extensible with multiple reasoning realizations. The article focuses on the architectural principles and reasoning methods of the framework.     

基于WEB的分布式混合网络管理系统的研究

计算机网络结构日益复杂,规模不断扩大,网络管理的作用愈显重要。利用现有的网络管理方面的理论、技术、方法、成果,基于SNMP,CMIP协议,并考虑到未来发展需要,设计出了一个综合代理、嵌入两种网管实现方式的基于Web的分布式混合网络管理模型,并对该模型进行了分析说明。     

基于Chord网的语义Web Service发现

本文提出一个实用、高效、可扩展的新型语义Web Service发现模型,将集中式的服务注册和服务发现机制分散到分布式网络结构中的各个注册节点,并引入本体概念组和服务特征向量概念.首先对服务语义本体分组,然后将服务描述和服务查询映射为服务特征向量进行匹配,从而提高了服务发现的效率和准确性.     

语义Web服务技术研究综述

近年来,随着信息化的发展,人们对信息技术的需求产生了强烈的依赖。文章主要对语义Web服务做了系统的介绍,所采用的技术,服务组合,服务匹配方法,以及一些常用的匹配计算方法。     

Supporting next-generation distributed applications

Even the current euphoria over the World Wide Web doesn't do full justice to the Internet's potential. With the manifold increase in CPU processing power and network bandwidth, it's inevitable that the Internet will support increasingly complex distributed applications. While information retrieval applications dominate the Internet today, the next-generation Internet will likely offer applications that can process massive amounts of data for visualization and support real-time interactivity. For instance, a digital library of satellite imagery might be processed for feature extraction or visualization. A virtual environment for training fire fighters might involve distributed simulations and real-time user interactivity. In 1994, the University of Texas at Austin opened the Distributed Multimedia Computing Laboratory (DMCL) to conduct the basic and experimental research necessary to address the problems of these emerging applications. The research work done at DMCL can be broadly classified into the following categories: resource management techniques that meet the performance requirements of applications (the Symphony, NetCop, and OSng projects); an information delivery architecture that meets the scalability requirements of applications (the Trellis project); a fault-tolerance framework for cooperative distributed applications (the Coyote project); an environment for creating and disseminating digital educational material over the Internet (the InfoWeave project). The article summarizes key research findings and ongoing projects at DMCL     

Developing distributed multimedia telecommunication applications

The emerging open services market transforms services into tradable goods. It involves users; customers; service, content, and middleware providers; and network operators. This market requires effective methods to: provide new services to meet niche market demands; support customized services; provide appropriate accounting and billing mechanisms; support personal and terminal mobility, and meet information interchange security requirements such as authorization, confidentiality, and integrity. Efficient processes will reduce investment risks and let us benefit from software and hardware product development advances. To meet these needs requires an appropriate infrastructure that supports the object oriented development of distributed multimedia telecommunication applications     

语义Web数据的云存储研究

介绍了海量RDF数据分布式存储的一种解决方案。随着Web数据和各种网络资源的剧增以及语义网的发展,海量RDF存储成为当前比较紧迫的问题。文中研究了当前流行的几种分布式存储框架,依托开源框架Hadoop Database(HBase),在Linux集群上实现了高效、协作存储海量RDF数据。     

Telecommunication services and distributed applications

The issues involved in standardizing the seventh (application) layer of the Open Systems Interconnection model are examined. The status of the ISO Open Distributed Processing (ODP) reference model and of other models is summarized. Telecommunication service requirements are discussed within the context of these standardization efforts     

基于SQWRL的语义Web服务发现

提出以扩展的语义Web规则语言SQWRL作为服务请求描述语言,以OWL-S作为服务发布描述语言,进行有效的服务发现.给出了服务发现的实例,通过实验,证实了该方法具有实用性强、简单可靠的特点.     

QoS-Aware Semantic Web Service Composition with Uncertainties

Choosing the optimal execution plan is an important process of semantic web service composition. However, Quality of service （QoS） based plan selection is still challenging because the uncertain QoS values and uncertain user preference make data aggregation and decision making hard. This paper presents a novel Uncertain multiattribute decision making-based semantic web service composition algorithm （UMC） to solve the above difficulties for the first time. UMC takes all possible QoS expression types （real number, interval and linguistic） into consideration and includes three main steps： defuzzifying linguistic data, normalizing the decision matrix and evaluating alternatives synthetically. Further, the strategies of uncertain preference conversion are also discussed in UMC. Other contributions of the paper include an extensible QoS ontology to express the relative concepts, a QoS aggregation algorithm and a set of experiments that demonstrate the effectiveness and benefits of our approach.     

基于语义Web的电信服务组合研究

针对电信业务领域服务数量的不断增加,以及用户需求多样化的实际情况,通过研究语义Web服务、OWL-S等语义相关技术,提出一个基于语义Web的电信服务组合模型,设计了电信业务领域本体库,实现了电信业务领域知识的共享,在此基础上,提出电信服务组合流程,并在实际环境中进行例证。     

网页数据多层语义描述标签设计

网络数据语义信息存在于每一层次结构中,通过多层语义描述标签能够反映网络数据不同层次的语义内容,进行跨层语义分析和理解,避免单一结构中语义理解的片面性。通过构建网页数据集进行实验分析,结合互联网协议规范,针对网页数据设计了多层语义描述标签,对各字段进行了明确定义。     

应用OWL-S实现Web服务合成的语义描述

从Web服务合成的角度出发，研究了Web服务的语义描述，从Web服务的语义描述语言OWL-S的结构入手，详细介绍了应用OWL-S实现服务合成的建模过程的语义描述的方法．并通过一个行程安排的实例进行具体的分析。     

基于SPARQL-DL的语义Web服务查询

语义Web服务发现是当前Web服务研究领域的热点,其核心研究内容是服务描述及相应的发现方法.服务描述分为请求描述与发布描述,发布描述具有描述完整,信息丰富的特征,而服务请求描述仅关注服务的部分特征,通常不构成一个完整的服务描述.现有方法使用相同机制进行请求描述与发布描述,以比对请求与发布中对应部分的同一性或相似性作为匹配依据.构建假想的完整服务描述作为服务请求既不合理也难以实施,从而限制了方法的实用性.本文提出以语义Web查询语言SPARQL-DL作为服务请求描述语言,以OWL-S作为服务发布描述语言,将服务发现问题转化为知识库的查询,从而进行有效的服务发现.通过实验,证实了该方法具有实用性强,简单可靠的特点.     

基于P2P的语义Web服务发现模型研究

为解决现有的Web服务缺少形式语义支撑,文中提出了一种基于P2P的语义Web服务发现模型,在P2P发现方面加入了本体信息,引入一种新的本体编码方式,使得Web服务在P2P层内支持语义发现,提高了Web服务发现的准确性和即时性.     

基于QoS的语义Web服务组合优化算法

在面向服务的环境下,存在众多可满足服务请求者要求的服务组合方案,如何从中选出最优或近似最优方案是Web服务组合优化要解决的问题.设计出一个不必探索整个解空间的优化算法——SBG算法,为服务请求者提供最优选择方案.实验结果表明,这种方法可有效提高选择方案的求解效率.     

基于P2P环境的语义Web服务发现模型

随着Web服务研究的逐步深入，其重要性已逐渐被人们所认识。目前，Web服务所采用的UDDI注册模型是一种集中式架构，面临系统瓶颈、单节点故障、查找效率低以及受注册在UDDI上的网络结点规模的限制等诸多方面的影响和制约。另外。Web服务标准中对Web服务的描述仅仅只是语法层次上．并未提供对语义描述的支持，这在很大程度上影响了Web服务发现的效率及准确性。为此．文章提出了一种基于P2P环境下的语义Web服务发现模型。