分布式数据库

Maintaining the data consistency is a critical technical problem in the distributed database system .

1引言分布式数据库系统在系统结构上的真正含义是指物理上分布、逻辑上集中的分布式数据库结构。

Distributed database system is a main research direction in the database field. Maintaining the data consistency is a critical technical problem in the distributed database system .

分布式数据库系统是数据库领域中的一个主要研究方向，数据一致性维护是分布式数据库系统中的一个非常关键的技术问题。

Query of distributed database is to provide an interface between user and database, which is key technique in this field.

分布式查询处理是用户和分布式数据库的接口，是分布式数据库系统的主要问题之一。

Distributed database,an important part of database system, is a combination of the technology of database and Internet.

分布式数据库是数据库技术与网络技术相结合的产物，是数据库领域中一个重要的分支。

Distributed database, an important part of database system, is a combination of the technology of database and Intemet.

分布式数据库是数据库技术与网络技术相结合的产物，是数据库领域中一个重要的分支。

The Mobile Database is a branch of the study of Distributed Database and Distributed computing.

移动数据库技术是分布式数据库技术和分布式计算研究的重要分支。

Further more, the thesis lucubrates some key techniques: aiming at the management of the distributed objects, we skillfully construct the isomorphic project object tree for the real projects structure by using the CORBA naming service, and laconically and effectively implement the management of the services and modules by using the location service. And we also propose a design which uses CORBA event service and Borland MIDAS to implement the distributed data service in a creative way and analyze the advantages and disadvantages of this design at the same time.

并针对一些关键技术做了深入的讨论和分析，例如针对整个系统的分布式对象的管理，巧妙地借用CORBA的名字服务构造了同构于实际工程组织的工程对象树，同时使用定位服务简洁而有效的实现了对服务和模块的管理；针对分布式数据库的实现，创造性地提出了一种使用CORBA事件服务和Borland MIDAS组件来实现分布式数据服务的设计，并实现了这个设计，同时分析了这种设计的优劣。

ABSTRACT In the field of DDBS , distributed data updating is a very important researchful problem, because da...

在分布式数据库领域，分布式数据更新是极其重要的研究课题，因为数据更新操作必须满足数据库的完整性、一致性、可靠性和稳定性要求。

Federated database is a kind of distributed database.

而联邦数据库是分布式数据库领域的一个分支，它弥补了传统分布式数据库的不足。

Distributed product data management is one of the key techniques for the implementation of GAMS. This paper analyzes the special characteristics of DPDM. A DPDM framework and a layered data management model in the distributed environment are presented based on the Multi Server cooperation mode. Several related techniques are proposed including object oriented distributed database m...

通过对敏捷制造环境下的分布式产品数据管理系统的分析和研究，设计了 DPDM系统的多服务器协同框架结构，提出了分层数据存储管理模型，探讨了动态联盟环境下实现分布式产品数据管理的建模技术、面向对象的分布式数据库管理技术、基于 Internet环境的 DPDM系统集成和分布式对象的互操作技术等

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。