对异构型分布数据源的统一访问
决策支持：许多决策支持场景，如那些处理财务分析和报告的场景，需要访问分布于各种数据源中的数据。
Decision support: Many decision-support scenarios such as those that address financial analysis and reporting require access to data distributed across a wide range of sources.
SPARQL被设计成能够查询Web 上分布的多个数据源。
SPARQL was designed to be capable of querying multiple data sources distributed across the Web.
注意，此时您只建立了单一数据源连接(到DB 2Information Integrator服务器)，来检索多个数据源中分布的数据。
Note that, at this point, you have only established a single data source connection (to our WebSphere Information Integrator server) to retrieve data spread across multiple sources.
将分布式请求发送到数据源进行处理，利用数据源的处理能力和特有的优化能力。
Take advantage of the data source processing strengths and unique optimizations, by sending distributed requests to the data sources for processing.
为响应一个应用程序SQL语句，联邦服务器自动生成到多个数据源的分布式请求。
The federated server automatically generates distributed requests to multiple data sources in response to a single application SQL statement.
分布式数据源数据挖掘的第一个问题是发现。
The first issue with data mining of distributed data sources is discovery.
有了联邦系统，便可以使用一条SQL语句将分布式请求发送到多个数据源。
With a federated system, you can use a single SQL statement to send distributed requests to multiple data sources.
在联邦服务器上处理一部分分布式请求，弥补SQL在数据源上的限制。
Compensate for SQL limitations at the data source by processing parts of a distributed request at the federated server.
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.
例如，WebSphereInformationIntegrator支持按照与单一数据源相同的方式访问各种分布式数据。
For example, WebSphere Information Integrator lets you access diverse and distributed data as if it were from a single data source.
从图1中的事件流关系图中，可以发现DataCapture环境将在事件数据源附近的分布式模型中运行。
From the event-flow diagram in Figure 1, you see that the data Capture environment is intended to run in a distributed model near the event data sources.
黄土高原数据仓库系统以分布式数据仓库为核心，包含多个异质数据源。
The Loess Plateau data warehouse system is a distributed data warehouse including several heterogeneous da-ta sources.
在分布异构的数据源之间不仅存在模式异构，而且存在上下文异构。
There exist both schema and context heterogeneity between distributed, heterogeneous data sources.
基于本体的语义信息集成主要解决分布异构的数据源之间的模式级异构和部分数据异构（包括同义字和同音异义字）。
Ontology-based semantic information integration resolves the schema level heterogeneity and part of data level heterogeneity between distributed data sources.
其次，大量数据源分布在不同的地理位置上，数据集中的成本较高；
Second, a lot of data are distributed to different locations, so the costs of collecting data are very high.
以云南省个旧西区为研究区域，选用TM多光谱遥感数据为基本数据源，了解围岩蚀变分布情况和构造特征。
This paper studies in the western part of GeJiu, Yunnan Province, using ETM multi-spectral data. finding out the spatial distribution of wall rock alterations and recognize structures.
随着空间数据获取能力的飞速发展，分布式存储管理的空间数据库将成为网络GIS的主要数据源。
Since distributed spatial database will be the main data source of Internet GIS, we have to cope with the intercommunication between heterogeneous databases and systems.
有些组件，如数据源，可以为多种目的服务，并在不同的时间参与多个分布式解决方案。
Some components, such as data resources, may serve many purposes and participate, at different times, in multiple distributed solutions.
数据服务中间件的主要功能包括数据的位置透明性、分布式数据查询、事务处理、异构数据源兼容。
Main functions of data access middleware are location transparency, distributed data query, transaction process and heterogeneous data sources compatibility.
随着应用程序中所涉及的数据量和分布范围的不断扩大，其中的数据源采用不同的方式进行集成处理。
As application data is increasing in both in size and distribution, the data resources will be integrated by different ways.
通过在不同的应用系统和数据源之间建立联系，SOA能够将各种异构应用集成起来并组成灵活的分布式应用系统。
By building the relations between different kinds of application systems and data sources, SOA can integrate the heterogeneous applications and make up the flexible distributed application system.
通过在不同的应用系统和数据源之间建立联系，SOA能够将各种异构应用集成起来并组成灵活的分布式应用系统。
By building the relations between different kinds of application systems and data sources, SOA can integrate the heterogeneous applications and make up the flexible distributed application system.
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