基于Web Service光传输监控系统的应用

提出了一种基于分布式Web Service技术的光传输监控系统的应用。在该系统结构中,光传输设备分布在广大的区域内,各个局域网内的光传输系统所采用的通信标准、平台和技术的不同给系统集成带来很大的困难。在这样的背景下,文章采用分布式Web Service技术,利用Web Service平台无关性、简单灵活性的优点解决光传输系统的集成问题。     

Web Service在压裂措施信息管理系统的应用

油田企业的应用系统只关注某一个业务或管理功能，在企业内部相互独立运行，它们之间很多数据集信息相互交叉、重复，形成了“信息孤岛”。针对现有石油企业存在的问题，结合Web Service的技术优势，提出了基于Web Service的压裂措施信息管理系统。采用Web Service克服了传统的分布式技术不适应平台、体系结构等缺点，为油田内部应用系统集成提供了解决方案。     

基于Web Service的分布式网络教学平台系统的设计

本文针对当前网络教学平台应用系统普遍采用的C/S、B/S应用架构的不足,基于Web Service的分布式设计架构的优势,设计并开发了一种新的面向服务的三层分布式网络教学Web平台系统,同时论述了该架构下相应Web服务的具体实现方法。     

分布式Web Service在.Net下的应用研究

介绍了Web Service模型架构，讨论了基于．NET的分布式Web Service模型的应用设计，阐述了在．Net平台下进行Web服务的开发的步骤，并展望了Web Service未来的发展。     

基于Web Service的分布式电子商务系统设计与实现

文章仔细分析了现有电子商务系统在构架上存在的不足和远程访问协议上存在的局限性，刨设了基于Web Service的分布式构架。该构架充分利用了Web Service的优势，将商务事件逻辑分布在多台服务器上，提高了系统的可靠性、稳定性、可扩展性以及维护性。在现有商务系统设施和技术平台的基础上，该系统充分利用松散耦合的服务程序集成了多种业务活动，初步构建了大型电子商务系统的架构。     

超市智能仓储和结算系统的开发

Web Service和RFID目前是信息领域中最为活跃的两个研究和应用主题,本文依据RFID仓储管理系统的要求,成功将RFID技术和Web Service技术应用于“智能超市”,创建了一个采用J2EE架构、部署在Tomcat系统上,采用java语言开发的Web Service信息系统平台并在模拟实验室中成功运行,实现了基于Web Service技术的RFID固定式阅读器加手持终端的超市仓储和结算系统,实现了包括货物的八库、出库、盘电、销售结算四大主要功能。     

基于AXIS的分布式Java Web Service的应用

Web Service是Web上数据和信息集成的有效机制。Web Service的新型架构,Web Service的高效执行方式。Web Service与其他成熟技术的有机结合以及Web Service的集成是解决现实应用问题的重要技术。文章阐述了Web Service的基本概念,以及SIAO在Web Service中的作用,同时分析了AXIS对SOAP的改进,最后讨论了基于AXIS的分布式Web Service的具体应用,并展望了Web Service未来的发展。     

基于云计算仿真平台的Web Service探究

本文主要介绍了基于云计算仿真平台的Web Service研究,提出了与计算仿真平台的建立及体系架构,以及在该平台下采用虚拟化技术对子云层进行整合,为Web Service提供服务的关键技术,发挥了平台的可用性、协同性、扩展性等特点。     

Web Service构建多层分布式职称申报评价系统

分布式、部件化、交互性和互操作计算机软件已经成为软件研发的一个重要方向.传统的分布式技术,如DCOM、CORBA等,具有如难以穿越防火墙,不同组件间互操作性差等缺点.因此笔者在设计职称申报评价系统时,提出了利用基于数据词典的Web Service作为教育厅与各高校之间、高校与本校的申报用户之间所有通讯的中间接口.文中详细介绍了基于数据词典和Web Service的职称申报评价系统实现的方法,为分布式异构数据库软件开发提供了一个范例.     

基于Web Service的SOA软件部署的研究

为实现校园教学管理的信息化、科学化,在分析现有校园信息管理系统特点的基础上,研究了基于Web Service的SOA(Service Oriented Architecture)的设计思想和关键技术。给出了一个在数字校园系统平台上使用Web服务实现SOA的应用实例。并阐述了采用SOA体系结构开发数字校园系统的软件重用、系统结构、服务组成等实现技术,为实现校园教学管理信息化和科学化提供了一种有效的解决方案。     

Dynamic Subcarrier Assignment for OFDM-PON Network Based on RSOA for ACCORDANCE

In this paper, we overview the principle of Orthogonal Frequency Division Multiplexing Passive Optical Network （OFDM-PON） systems, with a particular focus on upstream architectures capable of achieving 10Gbit/s colorless upstream transmission using Reflective Semiconductor Optical Amplifier （RSOA）. We propose an architecture of RSOA based OFDM-PON which can achieve 10Gbit/s upstream transmission over a single wavelength. A novel Dynamic Subcarrier Assignment （DSA） algorithm is also proposed to support my architecture, namely Service based Polling in Pipeline （SPP） dynamic subcarrier algorithm. A simulation was conducted to study the performance of SPP algorithm. Compared with the traditional dynamic bandwidth allocation algorithms, service based polling meets the quality of in pipeline algorithm service requirements excellently, and adapts orthogonal frequency division multiplexing passive optical network better with higher bandwidth efficiency and lower algorithm complexity.     

Edge node buffer usage in optical burst switching networks

Optical Burst Switching (OBS) combines the benefits of Optical Packet Switching and Optical Circuit Switching technologies to provide an efficient, yet cost effective, method for data transmission in an all-optical, bufferless, core network. While most studies on OBS has concentrated on the core OBS network, we contribute new studies for the buffer requirement of an OBS edge node. The buffer usage for OBS systems only arises in the edge nodes since they contain an array of assemblers which combines electronic data with a common destination into an OBS burst stream for transmission in an all-optical bufferless core network. Specifically, we present two analytical results for buffer usage in an OBS edge node: one for Poisson traffic and the other for self-similar traffic input. The results show that the aggregated traffic from many assemblers inherits the characteristics of the source input traffic. This means that the output traffic approaches Poisson if the input traffic is Poisson, and the output traffic remains self-similar if the input is self-similar. These results lead to the following important design issues when dimensioning buffer requirements in an OBS edge node: if the traffic input is Poisson, the M/G/m model is the model to use for obtaining the upper bound on buffer usage in an OBS edge node; and for the case of self-similar traffic, Brichet’s method can be used to provide the upper and lower bound.     

NGN的演进和Web Service技术

开放和融合是网络发展的趋势。ITU提出了GII(Global Information Infrastructure)的概念模型,从企业和用户的视点描述了电信网络演进的方向,并提出了ICA(Information Communication Architecture),详细描述了GII概念模型中的中间件功能。同时,在计算机界,网格技术和Web Service技术结合,形成了OGSA(Open Grid Service Architecture)的架构。结合Web Service技术,GII、ICA的功能可以表示为Web Service的集合,网络提供给用户的服务可以是Web Service服务,或者是Web Service组合后形成的更高粒度的服务。Web Service技术和NGN结合有利于网络的融合和开放,能够在传输网络之上形成一个业务网,必将促进NGN的发展。     

A design of public-data platform in digital campus based on web service

The developing of network drive the developing of information systems in campus. More and more business information systems are built in1990's. But most of these systems in campus are developed on different platform without standard. And some data in business information system should be shared between different departments. So the target of this paper is to solve the problem of sharing data in campus the through the web service. Web service is a service-oriented architecture (SOA) to provider service for service consumer. But the traditional model of web service is not suitable in digital campus. This paper designs a new model of web service for digital campus environment. And then a public-data platform is designed to realize the data sharing in heterogeneous systems. Next, the database designing and data processing flow is introduced. Finally, some monitor information of platform is showed.     

Enhancement of Key Derivation in Web Service Security

Key Derivation is an important part of numerous security standards, the importance of using it was discussed throughout the literature and industry standards. On the other hand, web service security is an area that has not seen substantial research and application for Key Derivation techniques. After studying the Key Derivation techniques which are applied in Web Service Security, we find the applied algorithms and current implementations to be very limited in regard to performance and their work-flow. These limitations introduce performance bottlenecks that can limit their applicability to low power machines and mobile systems or lead to designers compromising on security to meet the quality of service desired. Moreover, this issue becomes more relevant when applied to a high performance and demanding systems such as real-time business process monitoring and messaging systems. This paper explores how Key Derivation is implemented in web services and WS-Security engines, their limitations, the performance overhead it produces and proposes an enhanced Key Derivation work-flow that takes into consideration both security and performance and allows for fine tuning them. The performance of the proposal is tested using a series of benchmarks and the security properties are verified using a well-known validation tool.     

基于移动网络技术的车载导航/监控系统

阐述了一种集GPS导航技术、GPRS/CDMA移动网络通信技术、Internet技术于一体的车载导航系统,对其监控服务的系统结构、功能及其设计方法进行了分析。剖析了现有车载系统的性能特点和存在的不足,提出了基于无线通信技术的车载嵌入式终端的优势;并对车载导航系统的中心服务器(WEB Server)的设计方法及其与车载终端的双向信息传输协议进行了说明。     

一种在线的动态网页分块缓存方法

 分块缓存技术能够有效提高动态网页的服务质量.现有的既存系统较少使用分块缓存技术设计,如何将其应用于这些系统是一个很大的挑战.本文提出了一种在线的动态网页分块缓存方法,使原系统演化成基于分块的系统,为用户服务.该方法具有三方面优点:(1)使原系统在线演化,不影响系统对用户的服务提供;(2)简化了模板的维护,使逻辑执行的粒度从页面降低到分块,减轻了服务器端的压力;(3)独立于原系统,有效支持系统的变化和升级.文章最后对方法进行了实现和评估,结果说明该方法能够较好实现系统的演化,提高系统的服务质量.     

Towards Quality of Experience-based reputation models for future web service provisioning

This paper concerns the applicability of reputations systems for assessing Quality of Experience (QoE) for web services in the Future Internet. Reputation systems provide mechanisms to manage subjective opinions in societies and yield a general scoring of a particular behavior. Thus, they are likely to become an important ingredient of the Future Internet. Parameters under evaluation by a reputation system may vary greatly and, particularly, may be chosen to assess the users?? satisfaction with (composite) web services. Currently, this satisfaction is usually expressed by QoE, which represents subjective users?? opinions. The goal of this paper is to present a novel framework of web services where a reputation system is incorporated for tracking and predicting of users?? satisfaction. This approach is a beneficial tool which enables providers to facilitate service adaptation according to users?? expectations and maintain QoE at a satisfactory level. Presented reputation systems operate in an environment of composite services that integrate client and server-side. This approach is highly suitable for effective QoE differentiating and maximizing user experience for specific customer profiles as even the service and network resources are shared.     

HANGMAN Gb/s network

The design and implementation of the Hewlett-Packard active node gigabit-per-second metropolitan area network (HANGMAN) prototype network are discussed. The three main areas addressed are the physical-layer transmission system, the MAC sublayer protocols, and the architecture of the network interface unit. It is shown that low-cost gigabit-per-second transmission systems are practical, particularly in the local area environment where network links are typically limited to a few hundred meters. A MAC protocol that provides a synchronous service as well as the conventional asynchronous data service is described. The node architecture is presented and the way in which a single node can support multiple concurrent physical connections and how this architecture might be used in the future to develop high-performance protocol implementations are also discussed