查询词典 distributed database

Detailed analys the 《china yike》 commerce system and put a concrete designing project in the analysis of the process. And according to the design principle of distributed database system, the thesis illuminates the main data form in the system..

在此首先对《中华易客》商务系统进行了详细的分析，在分析的过程中提出了具体的设计方案，并根据分布式数据库的设计原则将此系统中所设计到的主要数据表进行了详细的说明。

Based on the unified data modeling, this resolution realizes the uniform request service to distributed heterogeneous spatial data by metadata and multi-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。

Because DHT methods just provide exact-match query facility, not satisfying the flexible query requirements, the paper also discusses a scalable, flexible multi-keyword resource located technology. The paper proposes the filtering conjunctive operation scheme similar with distributed database. It also includes an incremental search over the peers to decrease the query latency and bandwidth consumed. Lastly we investigate the popularity of user search behaviors and provide the cache strategy to reduce the overhead associated with operations spread across the wide area to provide the efficient resource query and access in scalable P2P system.

由于分布式哈希路由算法只能提供精确的资源定位，不能满足人们灵活的查找需求，因此本论文也讨论了一种便于扩展，灵活的多关键字资源搜索与信息服务技术，提出类似分布式数据库的过滤器连接算法，并采用增量式查找算法减少查询延迟及带宽消耗，利用缓存策略加速查询，以期为大规模的P2P网络提供高性能的资源搜索与数据访问服务。

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。

Simplistically, Cassandra is a distributed database with a BigTable data model running on a Dynamo like infrastructure.

简单地说，Cassandra是一个具有BigTable的数据模型并且运行在类似Dynamo的基础架构之上的分布式数据库。

Therefore at present the theory of acyclic database schema design has become a new important branch of database study.

无环数据库模式的设计理论研究，已成为了当前数据库研究的一个新的重要分支。

Combining the database and graph theory put the theory of acyclic database schema forward.

数据库理论与图论的结合产生了无环数据库模式设计理论。

Detail the aip aps to use the database, know how to learn, and must know the benefits of the database, it will help you learn faster.

详细说明：详细讲述了aip aps数据库的使用方法，懂得学习的人一定知道数据库的好处，它会帮助你更快的学习。

It must depend on external database. Without the database, one-dimensional bar codes can not have meanings. Two-dimensional bar codes overcome this weakness, it can encode a large ament of information in a small area, is a full data file.

目前常用的是一维条码，但一维条码最大的弱点就是表征的信息量是有限的，需要依赖外部数据库支持，离开这个数据库条码本身就没有意义了。

The database, which contains DNA C-values for just over 1 % of known angiosperm species, represents the largest database of nuclear DNA amounts available for any group of organisms.

该数据库，其中含有的DNA的C -值刚刚超过1 ％已知被子植物物种，代表了最大的数据库的细胞核DNA的金额可供任何一组的有机体。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了