基于WSRF的制造网格资源共享机制研究

分析了Web服务资源构架（WSRF）的规范和研究现状，探讨了制造网格的主要特征和体系结构，提出了一种基于WSRF的制造资源的封装机制．将制造资源封装为WS—Resource结构的制造网格资源，有效地屏蔽了资源的复杂性和异构性。在此基础上，设计了基于UDDI和WSRF的制造网格资源集成框架，阐述了设计思想，井进行了详细的功能分析．该框架可以方便地实现异构分布的制造资源之间的共享和协作。     

网格环境下数据访问与集成的研究与实现

OGSA-DAI WSRF致力于建造通过网格访问和集成来自不同的孤立数据源的中间件,符合基于WSRF的网格标准。介绍了OGSA-DAI WSRF2.2中间件的开发背景、体系结构、重要术语及关键技术,分析基于WSRF的数据访问和集成服务框架,给出基于OGSA-DAI WSRF的数据访问与集成方法及应用实例。     

网格体系结构标准的演变与分析

分析了网格标准的演变过程及其原因。从体系结构上看，从五层沙漏结构演变为开放网格服务体系结构（OGSA）；从实现机制上看，从开放网格服务基础设施（OGSI）演变为Web服务资源框架（WSRF）。同时展望了网格体系结构标准的发展趋势。     

基于WSRF的交通信息服务网格研究

介绍了Web服务、网格以及WSRF技术,并在WSRF、网格中间件GT4、PostgreSQL8数据库等工具的基础上,提出了一个交通信息服务网格(TISG)模型。同时,给出其实现部署,并以沈阳交通为例加以具体讨论。研究表明网格技术应用交通领域是可行而有效的。     

基于Web服务的光路封装及其提前预留管理模型

目前,很多高性能光网络平台能为网格计算环境动态提供按需专用光路,以满足e-Science等上层应用的数据密集性需求.为了更有效共享和管理光网络的光路资源,提出了一个基于Web服务的光路封装及其提前预留管理模型.详细描述了其运作机制和软件模块构成,并扩展语义Web中资源描述框架(RDF)来描述光网络中的光路资源.这有助于将光路资源以有状态Web服务形式发布并调用,及应用Web技术自动完成光路资源信息更新和管理.     

信息网格门户的研究

网格门户提供了一个访问网格环境的Web界面．当前存在的网格门户主要是基于计算网格的环境而设计，因此门户设计的重点是文件访问，提交任务，监控任务的执行，从而达到简化研究人员访问网格计算资源的目的．信息网格是在网格基础上的为用户提供信息的平台，通过信息网格门户用户可以无缝的获取所需要的信息．本文以上海网格为背景着重对信息网格门户的特点以及网格资源管理、工作流、事务进行分析和研究．     

桥接桌面网格和服务网格

介绍一项新的欧盟第7框架基础架构研究项目:EDGeS(Enabling Desktop Grids for e-Science).该项目致力于搭建推动桌面网格和服务网格间互用性的桥梁技术.还对现有的网格系统进行了分类:桌面网格(例如BONIC和Xtrem Web)与服务网格(例如EGEE).然后进一步描述了对于桌面网格和服务网格应用间转换的解决方案.探讨了现有的、流行的桥梁技术,用户访问问题,分布式数据的部署与应用开发的问题.     

一种基于虚拟工作空间的有状态 网格服务副本复制方法

 网格副本复制技术只能对无状态的数据、文件资源等进行复制,而不能对网格服务这种包含软硬件需求、有状态的服务形式进行复制.为解决网格服务的访问瓶颈、负载均衡等问题,本文提出一种基于虚拟工作空间的有状态网格服务副本复制方法Ragsres.Ragsres利用虚拟工作空间良好的执行分离属性和对执行环境可定制化的特性,实现对网格服务运行所需的软硬件环境的搭建和复制;根据虚拟机监控快照技术的数据转换原理,完成网格服务内存状态的复制;采用web服务的有状态资源模拟技术,实现有状态资源的状态复制.     

一个基于网格服务的面向服务架构设计与实现

面向服务架构是一种体系结构理念,通过接口和契约来连接业务逻辑和具体实现.文中提出了一种在网格环境下提供服务的面向服务架构的设计,并在Web服务资源框架标准和GT4工具下给出了一个实现.最后,验证了该架构的优越性,为实现SOA提供了一种比传统实现方式更好的解决方案.     

Research of Adaptation of Infrastructures for WSRF in Grid Computing

1IntroductionGrid Computing is a promising emerging technologythat is growingin mindshare andrelevanceintheindus-try .Applications that take advantage of Grids are underdevelopment in both academic and commercial organiza-tions[1].GBuilderis anintegrated development platformwe worked out based on extant Grid Computing toolk-its .It encapsulates the complicated Webservice compil-ing,deploying over these infrastructures ,informs usersof intelligible information about mid-outcomes and er-rors …     

Techniques for enhancing real-time CORBA quality of service

End-to-end predictability of remote operations is essential for many fixed-priority distributed real-time and embedded (DRE) applications, such as command and control systems, manufacturing process control systems, large-scale distributed interactive simulations, and testbeam data acquisition systems. To enhance predictability, the Real-time CORBA specification defines standard middleware features that allow applications to allocate, schedule, and control key CPU, memory, and networking resources necessary to ensure end-to-end quality of service support. This paper provides two contributions to the study of Real-time CORBA middleware for DRE applications. First, we identify potential problems with ensuring predictable behavior in conventional middleware by examining the end-to-end critical code path of a remote invocation and identifying sources of unbounded priority inversions. Experimental results then illustrate how the problems we identify can yield unpredictable behavior in conventional middleware platforms. Second, we present design techniques for ensuring real-time quality of service in middleware. We show how middleware can be redesigned to use nonmultiplexed resources to eliminate sources of unbounded priority inversion. The empirical results in this paper are conducted using TAO, which is widely used and open-source DRE middleware compliant with the Real-time CORBA specification.     

CORBA Notification Service and RSVP-Based Architecture to Provide QoS Guarantees

CORBA is an object-oriented middleware defined by the OMG. It is designed to support the development of distributed applications by separating interfaces from implementations. Unfortunately, CORBA does not consider QoS requirements inherent to new applications such as teleconferencing and telecommunication services. The Resource reSerVation Protocol (RSVP) is an IETF protocol that allows real-time applications to reserve necessary resources at routers along the transmission paths, so the requested bandwidth can be available when transmission actually takes place. In this paper, we discuss the use of Notification Service and RSVP to provide end-to-end QoS to applications supported by CORBA architecture.     

基于CORBA的移动多Agent框架

随着网络和移动智能体技术的不断发展,如何在网络资源中找到自己需要的服务成为一个热门话题。描述以一种移动的多智能体系统,并且在进行系统底层通信、智能体在网络环境移动、智能体与服务器之间通信应用CORBA。服务器接受任务,派遣服务请求智能体在网络环境中寻找能为自己提供服务的服务器,完成向服务器预订服务任务。给出系统接受任务后派遣请求智能体的工作流程及服务器接受智能体访问的流程。     

Building telecommunications management applications with CORBA

CORBA is an architecture for distributing and modeling computing applications. CORBA based network management is certainly an attractive approach, as network management is in essence a distributed application. This article presents a model of Managed Objects as CORBA objects, and how CORBA services and facilities can be used to build management applications. Special attention is paid to the work that has been done in the context of TINA-C (i.e., the session model and the Distributed Management Facilities Architecture).     

一种基于CORBA和JNDI技术的通用MIB访问接口的设计

本文提出了利用JNDI(Java Naming and Directory Interface,Java名录访问接口)与CORBA(Common Object Request Broker Architecture,公共对象请求代理构架)名字服务相结合实现MIB(Management Information Base,管理信息库)与DIT(Directory Information Tree ,目录信息树)在API(Application Programming Interface,应用编程接口)级的集成构架,集成的关键是用CORBA名字服务建立一棵基于DN(Distinguished Name,绝对识别名)的名字树.本文对如何利用CORBA名字服务构建MIT(Management Information Tree,管理信息树)名字树的问题进行了详细讨论.     

Managing the network state evolution over time using CORBAenvironment

This paper proposes a CORBA-based framework for managing the network state evolution over time. This framework is based on the concept of CORBA temporal agents, capable of managing the past and current behavior of network resources. Managed objects use specific time attributes for representing how their values are evolving in time. Moreover, specially designed operations (services) enable users to exploit the temporal dimension of management information in order to understand the past, control the present, and thus even predict the future of managed objects. The management environment is designed in order to provide coexistence and interoperability with existing management platforms