【作者】 肖桂；

【导师】 管在林；

【作者基本信息】 华中科技大学 ， 管理科学与工程， 2004， 硕士

【摘要】 虚拟制造组织(Virtual Manufacturing Organization,VMO)作为先进制造模式的一种发展形式依赖于网络信息技术的大量运用,具有分布、扁平网络化的组织结构以及分布和并行的管理与控制机制。它的成功运作以及其成员企业的相互协作需要共享和交互大量的数据信息,因此信息集成技术是整个VMO存在的基础,也是VMO中研究的热点和重点。本文研究VMO中信息集成的关键技术。首先提出一种基于CORBA分布式对象管理技术的开放式软件总线,并且在此总线上实现一种适合VMO分布式环境的即插即用数据集成机制。这种即插即用机制通过一定的接口协议对所涉及的数据进行控制,并且实现对集成对象的注册和定位机制。即插即用机制实现了代码的重用性,对象的插入或删除处理不会影响到总线中的其它对象,保证了系统的灵活性、可扩展性和可重用性。然后给出一种XML公共数据模型,在此基础上研究异构数据模式与XML模式的映射问题,着重分析了关系模式与XML模式之间的各种映射规则。最后,在上述关键技术的基础上,结合实际应用,设计并简单实现了一个基于CORBA/XML的VMO信息集成系统。同时讨论了系统的主要设计和实现问题:分布式对象的即插即用、基于区域概念的管理策略等。本文针对VMO中数据源分布、异构的特点,提出了基于CORBA/XML的解决方案:基于CORBA设计一个多层客户/服务器框架来解决分布性问题;采用XML公共模式解决系统异构性问题。更多还原

【Abstract】 As one kind of advanced manufacturing system, virtual manufacturing organization (VMO) relies on the intensive application of network and information technologies, and processes the properties of distributed and flat networked organization structure as well as decentralized parallel mechanism of management and control. Its successful operation as well as coordination of membership enterprises therefore requires for vast amount of sharing and interoperation of data and information. In this sense, information integration is the key to the survival of VMOs.This thesis focuses on some key technologies for the information integration of VMOs. First of all, an open software bus is proposed based on CORBA-based distributed object management technology. A plug-in-and-play data integration mechanism has been implemented with this software bus, which is suitable to the distributed environment of VMO’s. This mechanism controls the sharing/exchange of data through relevant protocols, and accomplishes the registration and location of objects to be integrated. The property of ‘plug-in-and-play’ ensures the reusability of codes. With this, the insertion and deletion operations do not have any influence on the other objects in the system, which leads to the flexibility, scalability and reusability of the system.An XML-based public adapt model is then introduced. Based on this, the mapping between XML schema and heterogeneous data schema is investigated, with emphasis being put on the analysis of the rule of reflection between XML schema and relationship pattern.Based on the results of the researches on the above key technologies, and aiming at some practical application, a CORBA/XML based integration system for VMO has been designed and partially implemented. Issues such as the plug-in-and-play of distributed objects as well as region-based management strategy have been discussed for the system design and implementation.The core of the CORBA/XML based solution proposed in this thesis with respect to the characteristics of distributed and heterogeneous data of VMOs includes: a CORBA-based multi-layer C/S framework for solving the problem of distribution, and XML-based public schema for tackling the difficulty of heterogeneousness.更多还原