Client/Server计算的协作模型及其开发工具

基于的Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ模型的核心是Ｃｌｉｅｎｔ向Ｓｅｒｖｅｒ请求单个独立的服务,为处理Ｃｌｉｅｎｔ请求复杂服务的情况,本文提出了一个Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ计算的协作模型,可支持Ｃｌｉｅｎｔ激活多个子服务以及多个子服务之间的协作交互,并在此基础上设计了一个基于代理的Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ开发工具。     

基于SMIB的可扩充的服务组织

在Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ系统中，服务的可扩充性是关系整个系统性能的重要的设计问题，本文提出了一种基于ＳＭＩＢ的可扩充的服务组织方式。讨论了相关的服务组织模型，服务管理信息库组织和基于ＳＭＩＢ的服务进程管理问题。     

Client/Server计算的协作模型及其开发工具

该文提出了一个Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ计算的协作模型，可支持Ｃｌｉｅｎｔ激活多个子服务以有多个子之间的协作交互，并在此基础上，设计了一个基于处理的Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ开发工具。     

基于WWW的信息服务系统结构模式

介绍了基于ＷＷＷ的Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ和Ｂｒｏｗｓｉｒ／Ｓｅｒｖｅｒ信息服务系统的结构模式。Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ结构具有交互性强,安全,网络通讯量低,速度快等特点。Ｂｒｏｗｓｅｒ／Ｓｅｒｖｅｒ结构是以Ｗｅｂ技术发展起来的,具有系统开发和维护简单,对用户端几乎没有要求,界面友好,操作简单,适于网络信息发布等特点。分析认为,Ｂｒｏｗｓｅｒ／Ｓｅｒｖｅｒ结构是ＷＷＷ信息服务系统结构模式的发展     

基于Telnet协议和Clinet／Manager／Server结构综合的信息检索…

本文提出了综合Ｔｅｌｎｅｔ协议和Ｃｌｉｅｎｔ／Ｍａｎａｇｅｒ／Ｓｅｒｖｅｒ结构的网络服务模型；在基于Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ结构的ＲＤＢＭＳＳＹＢＡＳＥ基础上实现了Ｔｅｎｅｔ协议和Ｃｌｉｅｎｔ／ｍａｎａｇｅｒ／Ｓｅｒｖｅｒ结构综合的图书馆信息检索应用系统，构造了图书馆网络信息服务系统的Ｃｌｉｅｎｔ／Ｍａｎａｇｅｒ／Ｓｅｒｖｅｒ．     

基于PVM的分布计算的研究

本文讨论了ＰＶＭ的计算模型，分析了其支持客户机／服务器（Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ）分布计算的不足，设计和实现了一个可以提供较好透明性的，静态和动态调用接口的ＲＰＣ机制，并获得较好的结果。     

基于分布对象的冗余服务模型

针对现有的分布计算模型不能充分描述冗余服务的特点,文中基于分布对象的观点,提出一个面向冗余服务的计算模型ＨＯＲＩＳ。它利用类和实例的概念定义了冗余服务,并将状态服务和无状态服务区分开来,同时还刻画了分布计算环境中的请求和主机的概念。在ＨＯＲＩＳ的基础之上,文中创建了一个冗余服务的管理框架ＡＭＡ,并在ＣＯＲＢＡ平台上进行了实现,与其它冗余服务的管理框架相比,它具有接口开放,适应性强、能管理异构服务以     

一种多智能体系计算市场模型

本文针对网络信息服务问题提出一种多智能体ＭＡＳ（ｍｕｌｔｉ－ａｇｅｎｔ ｓｙｓｔｅｍ）计算市场模型，定义了计算市场，计算任务Ｃｏｎｓｕｍｅｒ和Ｓｅｒｖｅｒ实体；分析了实体在计算市场中的行为，证明存在针对任务的市场平衡；确定衡量市场效率的标准是市场运行造成的资源分配与最优分配的距离。     

Client／Server中应用成份的分布方案

本文概述了Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ计算技术的志源，优点与不足之处，Ｃ／Ｓ系统中应用成份分布仅有一些可供参考的准则。     

基于Client/Server模式的热电公司MIS的设计与实现

本文从热电公司的组织机构和功能分布出发，提出了一个基于Ｗｉｎ－ｄｏｗｓＮＴ／Ｓｙｂａｓｅ的Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ计算环境系统平台。并且在此基础上设计和实现了整个ＭＩＳ系统     

Using Maude to write and execute ODP information viewpoint specifications

The aim of the open distributed processing (ODP) information viewpoint is to describe the semantics of the information and of the information processing in a system, from a global point of view, without having to worry about other considerations, such as how the information will be finally distributed or implemented or the technology used to achieve such implementation. Although several notations have been proposed to model this ODP viewpoint, they are not expressive enough to faithfully represent all the information concepts, or they tend to suffer from a lack of (formal) support, or both. In this paper, we explore the use of Maude as a formal notation for writing ODP information specifications. Maude is an executable rewriting logic language especially well suited for the specification of object-oriented open and distributed systems. We show how Maude offers a simple, natural, and accurate way of modeling the ODP information viewpoint concepts, allows the execution of the specifications produced, and offers good tool support for reasoning about them.     

A formal description of open distributed processing (ODP) trading based on guidelines for the definition of managed objects (GDMO)

New requirements of growing computer networks and information systems have an influence on extended client/server models with increased functionality. This forms the basis for service management in distributed systems which is realized by a service trading concept. This paper studies the requirements derived from the Open Distributed Processing (ODP) Reference Model in order to consider an open service market. Furthermore, it examines management possibilities for describing the service trading scenario. Because of similar architectures and properties ODP services, service offers, types, exporters and traders are mapped onto management components and modeled as managed objects. Therefore, the Guidelines for the Definition of Managed Objects (GDMO) are used. The final concept allows a precise and unambiguous study of the service trading scenario and provides means for exporting and importing of service offers in a distributed environment.     

ODP系统中的观点及观点规范语言

开放分布式处理ＯＤＰ的目标是给应用程序间提供一个一致的接口模型，以实现分布透明性、互操作性和可移植性。开放分布式参考模型ＩＳＯ ＲＭ－ＯＤＰ提供了一个分布式系统的框架，从五个不同的观点描述ＯＤＰ系统，并提出相应的规范语言的概念和构造规则以便对该观点进行描述，本文首先介绍了这五种观点及相应的规范语言的概念和构造规则，并讨论了它们之间的关系。     

开放分布式处理及其实例

迅速发展的计算机与通信技术使得构造大型分布式系统成为可能,尽管如此,互连系统特别是     

A generic architecture for VPN configuration management

This paper describes the specification of a management architecture allowing virtual private network (VPN) customers to dynamically modify the configuration of their VPN. The specification has been structured according to the ODP viewpoints. A special emphasis has been laid on how changes in the logical VPN configuration affect or are reflected in the underlying physical networks. As a result, an informational and a computational VPN configuration management architecture have been developed illustrating how processing and data can be distributed between the different layers and domains composing the architecture.     

分布对象管理的联邦交易模型

分布对象管理是实现分布对象互操作的一个重点.该文通过扩展ODP中的基本交易模型,实现了对象服务的局部管理,提出了一种新的联邦交易模型,使用联邦交易空间和信任度的概念实现了大规模互操作环境中的对象服务的全局管理,给出了分布对象服务的联邦搜索过程和联邦搜索规则,以及联邦查询的最佳搜索路径选择算法,研究并提出了联邦交易的实现结构模型和建立联邦和约的协商协议.     

Writing and executing ODP computational viewpoint specifications using Maude

The Reference Model of Open Distributed Processing (RM-ODP) is a joint standardization effort by ITU-T and ISO/IEC for the specification of large open distributed systems. RM-ODP is becoming increasingly relevant now because the size and complexity of large distributed systems is challenging current software engineering methods and tools, and because international standards have become key to achieve the required interoperability between the different parties and organizations involved in the design and development of complex systems. RM-ODP defines five viewpoints for decomposing the design activity into separate areas of concern. One of the RM-ODP viewpoints, the computational viewpoint, focuses on the basic functionality of the system and its environment, independently of its distribution. Although several notations have been proposed to model the ODP computational viewpoint, either they are not expressive enough to faithfully represent all its concepts, or they tend to suffer from a lack of formal support. In this paper we introduce the use of Maude as a formal notation for writing and executing ODP computational viewpoint specifications. Maude is an executable rewriting logic language specially well suited for the specification of object-oriented open and distributed systems. We show how Maude offers a simple, natural, and accurate way of modeling the ODP computational viewpoint concepts, allows the execution of the specifications produced, and offers good tool support for reasoning about them.     

FDTs for ODP

This paper discusses the use and integration of formal techniques into the Open Distributed Processing (ODP) standardization initiative.

The ODP reference model is a natural progression from OSI. Multiple viewpoints are used to specify complex ODP systems. Formal methods are playing an increasing role within ODP.

We provide an overview of the ODP reference model, before discussing the ODP requirements on FDTs, and the role such techniques play. Finally, we discuss the use of formalisms in the central problem of maintaining cross viewpoint consistency.     

UML在分布式系统中的应用与研究

ＵＭＬ（Ｕｎｉｆｉｅｄ　 Ｍｏｄｅｌｉｎｇ 　Ｌａｎｇｕａｇｅ）是一种标准的、功能强大的建模语言。ＩＳＯ ＲＭ－ＯＤＰ（ＩＳＯ开放分布式处理参考模型）为开放、灵活的分布式系统提供了主框架。文章提出了一种用ＵＭＬ为ＯＤＰ系统建模的方法,它以ＯＤＰ的概念和ＵＭＬ的符号为基础。     

An RM-ODP enterprise view for spatial data infrastructures

Spatial Data Infrastructures (SDIs) are large, open, distributed and standards-based information systems which intend to facilitate and promote the use of spatial data and spatial services on the Internet. Spatial data describe information tied with locations on Earth, while spatial services allow to manipulate spatial data following a Service Oriented Architecture. This paper proposes to model SDIs as federations of autonomous communities following the enterprise language of the ITU-T and ISO/IEC ‘Reference Model of Open Distributed Processing’ (RM-ODP), and the recently approved ‘Use of UML for ODP Systems Specifications’ (UML4ODP). The enterprise language of the RM-ODP provides a conceptual foundation to address several aspects of SDIs not previously considered from a systems architecture point of view. The use of UML4ODP provides a modeling language to facilitate the exchange of knowledge about SDI, and it is an opportunity to try this recent standard for a class of large and complex systems.