分布式数据库

In distributed database system, it is not the centralized control of system but the site autonomy is emphasized.

讲述了分布式数据库在物流系统的体系结构中的体现。

Because of the autonomy, mobility and communicativeness of agent, the transaction is very efficient, especially for large-scale distributed database systems.

由于Agent具有自治性、移动性和通信性，使得事务的执行效率更高，尤其适用于大规模的分布式数据库系统中。

This paper presents a new algorithm which is useful to concurrency control of distributed database system.

针对分布式数据库的并发控制提出了一种新算法。

The model of CPR is proved to be available by the experiment of distributed database to p...

通过多媒体分布式数据库的具体实现，验证了这一电子病历系统模型的可行性。

This function is copied from Converting DDB to DIB

这个函数复制从分布式数据库的DIB的转换

Database you are about to create will ever be part of a distributed database system

如果该数据库有可能是一个分布式数据库系统的一部分，对于该参数需要给与特定的关注

With the wide application of distributed database system, how to maintain theconsistency with the less spending as much as possible among sites is a disquisitive hardresearch.

随着分布式数据库系统的广泛应用，如何以最小的开销保证数据库系统中数据各冗余副本之间的一致性，成为该领域的一个研究热点。

In addition,we introduce the design structure of the federated database system-LNFDBS being developed by us.

当前解决的方法主要有网关、多数据库系统、分布式数据库系统、联邦数

Moreover, A hybrid algorithm, ALHybrid, which is made of the algorithm LIDBSO and the algorithm AprioriIpv, is designed. Two algorithm, MQC_Apriori and MQC_LIDBSO, are given to mining multiple level quantitative association rules with item constrains. Two algorithm, PMARⅡ and PMARⅢ, which are based on different sequential mining algorithms, are given for parallelling mining association rules. In order to solve the mining association rules problem when we add a set of data to a database or delete a set of data from a database, two incremental updating algorithm, EUAR and EUAR, are given. Three incremental updating algorithm for association rules mining, DIUAⅠ, DIUAⅡ and DIUAⅢ, are dedigned to solve the three kinds of association rules incremental updating problem in distributed databases.

另外，文中还设计了一个算法LIDBSO与算法AprioriIpv相结合的混合采掘算法ALHybrid；对于多层次、带约束、多值属性关联规则的采掘问题，给出了两个采掘算法：算法MQC_Apriori和算法MQC_LIDBSO；在关联规则的并行采掘方面，还设计了两个基于不同顺序关联规则采掘算法的并行算法：算法PMARⅡ和算法PMARⅢ；在关联规则的增量式更新问题上，还给出了两个改进算法：算法EUAR和算法EUARˉ，分别用于解决当数据库增加或删除一个数据集合时的关联规则增量式更新问题；针对分布式数据库中的关联规则增量式更新的三类问题，提出了三个增量式更新算法：算法DIUA Ⅰ、算法DIUAⅡ和算法DIUAⅢ。

The best "period piece" on this topic is "Notes on Distributed Databases" by Bruce Lindsay et al. It lays out the fundamental principles for database replication and discusses a number of techniques that deal with achieving consistency.

当时在这个领域具有指导意义的一篇文章是Bruce Lindsay写的《分布式数据库特征》，这篇文章列出了数据库冗余的基本原理并讨论了大量解决一致性问题的技术。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。