本文描述了一个分布数据库系统的混合并发控制策略，这个策略使用了动态时间标签分配方法。
We describe a hybrid concurrency control policy using dynamic timestamp allocation method for distributed database systems.
联邦数据库系统的用户可以对存储在联邦系统中任意位置的数据进行分布式查询，不管自己的位置在哪里，也不管数据源使用的是哪种SQL方言。
Users of a federated database system can pose distributed queries over data stored anywhere in the federated system, regardless of its location or the SQL dialect of the data source.
Dan在商业分布式计算技术的研究方面有20多年的经验，涉及的领域包括面向事务和对象的系统、编程语言、消息传递和数据库系统。
Dan has over 20 years of experience in research and commercial distributed computing ranging over transaction and object-oriented systems, programming languages, messaging, and database systems.
在分布式数据库系统中，由于数据的分布和冗余，查询处理变得更为复杂。
For the distributed database systems, query processing becomes more difficult because of distribution and redundance of data.
分布式数据库系统可以看作是一系列集中式数据库系统的联合。
Distributed database system may be regarded as a series of union of centralized database system.
在分布式数据库系统中，数据库复制对于系统的可靠性及效率起着非常关键的作用。
In distributed database systems, database systems for the reproduction of the reliability and efficiency play a very crucial role.
分布式数据库系统虽然基于集中式数据库系统，但却有一定的特色和理论基础。
The distributed database system has its own characters and theory, though it was based on the centralized database system.
安全分布式数据库系统中，常会出现信息不一致现象，由此产生推理通道。
In a secure distributed database system, information inconsistency often exists, thus gives rise to inference channel.
在大规模的分布式数据库系统中，数据库复制对于系统的可靠性及效率起着非常关键的作用。
In the extensive distributed data base system, the data base duplication plays a very key role to the dependability and efficiency of the system.
联邦数据库系统具有分布性、异构性、自治性、透明性的特点。
Distribution, heterogeneity, autonomy and transparency are the most important characteristics of Federated Database System.
该解决方案通过建立统一的数据模型，使用元数据与多数据库系统实现了对分布的异构的空间数据的统一访问请求服务。
Based on the unified data modeling, this resolution realizes the uniform request service to distributed heterogeneous spatial data by metadata and multi-database system.
本文描述一个分布式关系数据库系统中具有语义优化的查询处理算法。
In this paper, we describe an algorithm, for query processing with semantic optimization in distributed relational database systems.
提出了一种基于对象服务的分布式数据库系统的设计方案，介绍了其工作原理和设计思想。
This paper brings forward a design scheme of distributed database system based on object service and presents its working principle and design thought.
在分布式实时数据库系统中，保证事务原子性的唯一途径是研究和开发出一个实时的原子提交协议。
In a distributed real time database system, the only way to ensure transaction atomicity is to investigate and develop a real time atomic commit protocol.
分布式数据库系统的研究涉及分布式处理技术、网络技术和数据库技术的研究，而这些研究必须贯穿在对一些现实问题的解决之中。
The study of distributed involves the study of distributed processing technology, net work technology and database study, which must be related to solution on some real existent problems.
历史数据库系统作为分布式监测诊断系统的一个重要组成部分，为故障诊断、工况分析提供信号来源。
As an important part of a distributed monitoring and diagnosis system, history database system is the signal sources of the fault diagnosis and condition analysis.
针对分布式多数据库系统的数据一致性，提出了一种复制控制法的实现策略。
Firstly, this paper gives a strategy to implement control method of copy for data consistency of distributed multi-database system.
由于分布式数据库系统并不是网络技术与集中式数据库的简单结合，需要在合适的系统架构上实现。
As distributed database system is not a simple combination of network technology and centralized database, it needs to achieve in a suitable system framework.
在广域网中，片段分配是分布式数据库设计中的一个主要问题，因为它关系到整个分布式数据库系统的性能。
On a wide area network, fragment allocation is a major issue in distributed database design since it concerns the overall performance of the distributed database system.
针对分布式并行数据库系统DPDBS中数据库副本数、数据库分布等信息的动态性，提出全局数据目录的动态管理和维护算法。
Aiming at the dynamic characteristic of the data directory in distributed and parallel database system (DPDBS), the dynamic arithmetic for whole data directory is put forward.
本文设计和实现了一个分布式的城市电磁环境数据库系统以及系统中的分布式查询处理模块。
This paper designed and realized a distributed database system of the urban electromagnetic environment and the distributed query processor in the system.
随着互联网和分布式数据库系统的广泛应用，如何保证多个数据库之间的数据一致已成为系统可靠运行所要解决的重要问题。
With the wide application of the internet and the distributed database system, it has become more important to guarantee data consistency of multi-database for system to run reliably.
事务的分布性和事务触发的不可预测性使得分布式主动实时数据库系统中的事务调度变得较为复杂。
The distribution of transactions and unpredictability of transaction triggering make the transaction schedule more difficult in distributed active real-time database system (DARTDBS).
分布式对象构造技术是实现分布式数据库系统的基础，而数据库访问技术是开发分布式数据库系统的关键。
Distributed object construction technique is the foundation to achieve distributed database system function, and the technique of accessing database is the key to achieve distributed database system.
本文设计实现了一个分布式的医学图像数据库系统。
A distributed database system which is based on existed centralized medical image database system is designed.
最后给出了一个基于JDBC的分布式实时数据库系统设计的应用实例。
As an application, a design method of a distributed real time database system based on JDBC and Web is given.
本文将详细介绍分布式事务、并发控制和资源请求模型，总结出分布式数据库系统的通用死锁条件。
In this paper, distirbuted transaction, concurrency control and resource request model are introduced in detail. The universal deadlock condition in distirbuted database system is summarized.
保持数据的一致性是应用分布式数据库系统的一个根本要求。
Maintaining the consistency in distributed database system is a basic requirement.
变电运行系统基于分布式数据库系统设计，采用了面向班组、面向基础数据的设计思想。
The subsystem is based on distribution database structure design. A new database system design method, named as basic working units and data-oriented, is utilized.
由于分布式数据库系统不能满足PK I安全体系结构的要求，我们采用目录服务技术来为其实现证书、证书作废列表的存储管理。
Because the DBS cannot meet the requirement of PKI, we use the Directory Service technology to implement the administration of Certificate and Certificate Revocation List for PKI system.
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