从待处理数据的抽象层次上分，融合技术可分为像素级、特征级和决策级三种。
From the abstract level of the data which is to be dealed with, the image fusion technique can be divided intoto pixel level, feature level and decision level.
取决于项目的复杂性，可以在两个不同层次的抽象和粒度上指定规范化数据模型。
Depending on the complexity of the project, a canonical data model may be specified at two different levels of abstraction and granularity.
安全管理员可以在接近于组织结构的抽象层次上控制对数据库的访问。
Security administrators can control access to their databases at a level of abstraction that is close to the structure of their organizations.
Ganesh指出所谓规范的数据模型通常层次较高且对于实践应用来说过于抽象。
Ganesh points out that "the" canonical data model is typically too high-level and abstract for the practical use.
SpringDAO：JDBC DAO抽象层提供了有意义的异常层次结构，可用该结构来管理异常处理和不同数据库供应商抛出的错误消息。
Spring DAO: the Spring JDBC DAO abstraction layer offers a meaningful exception hierarchy for managing the exception handling and error messages thrown by different database vendors.
在设计层次型数据库时，一个较好的设计方法是分二步走：首先利用实体联系方法抽象出现实世界的实体联系模型，然后将实体联系模型变换到具体DBMS 所支持的层次型模型。
A good algorithm to design such a hierarchical database consists of two steps, first, to describe real world in E-R model and then, convert it to the model supported by the DBMS.
工程设计数据管理系统(DMS)可以支持设计的层次分解、多级抽象、并发控制和设计进展。
A data management system (DMS) for engineering design can support hierarchical decomposition, multiple levels of abstraction, concurrency control and design evolution.
依据实际业务中对数据的操作要求，并对数据和操作进行封装和抽象，产生业务逻辑层的类及其类层次结构。实现对业务逻辑层的设计。
It gives the classes and hierarchical structure of them and the implementation of the design of logic layer, according to data and operation of practical business and encapsulation and abstract.
在实际情况中，许多属性都可以进行数据归类，以形成概念汇聚点，这些概念依抽象程度不同可构成描述它们层次结构的概念树。
In actual situation, many attribute all can classify by data coming to the spot of concept gathered. These concepts can constitute the concept tree which may describe their order and structure.
在实际情况中，许多属性都可以进行数据归类，以形成概念汇聚点，这些概念依抽象程度不同可构成描述它们层次结构的概念树。
In actual situation, many attribute all can classify by data coming to the spot of concept gathered. These concepts can constitute the concept tree which may describe their order and structure.
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