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   非结构化数据 在 自然地理学和测绘学 分类中 的翻译结果: 查询用时:0.199秒
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非结构化数据
相关语句
  non-structured data
    The data management has changed enormously as companying with the development of the Information technology. It changed from structured data management to non-structured data management.
    随着信息技术的发展,所管理的数据也发生着重大的变化,从过去仅仅管理结构化数据,至今必须管理多种类型的非结构化数据
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  “非结构化数据”译为未确定词的双语例句
    There are some problems of RDB in GIS application.
    传统的关系数据库在GIS的应用中主要存在以下问题 :除数据类型简单 ,不能很好地表达非结构化数据外 ,也难以表示GIS中具有复杂结构的数据 ;
短句来源
    There are some problems of data model in GIS application. It is difficult for them to describ non-structured or complex-structured data in GIS and can't express the relation of inheritance,aggregations,and so on.
    传统的GIS数据模型难以表达非结构化数据和GIS中具有复杂结构的数据 ,更不能表达数据间继承、聚合等在GIS中广泛使用的关系。
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查询“非结构化数据”译词为用户自定义的双语例句

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  non-structured data
While retrieving the structured data was not difficult, gathering the non-structured data required excessively long time.
      


There are some problems of RDB in GIS application. Sometimes the data type is too simple to describe non structured or complex structured data in GIS and the simple model cant express the relation of hierarchy, inheritance, aggregation, generalization or specialization, or there is impedance mismatch between SQL and programming language, especially the current popular object oriented language. While object oriented (OO) technology may be useful to solve these problems. ORACLE spatial database extends the...

There are some problems of RDB in GIS application. Sometimes the data type is too simple to describe non structured or complex structured data in GIS and the simple model cant express the relation of hierarchy, inheritance, aggregation, generalization or specialization, or there is impedance mismatch between SQL and programming language, especially the current popular object oriented language. While object oriented (OO) technology may be useful to solve these problems. ORACLE spatial database extends the traditional relation database with the technology, the so called object relation model, which features adding to RDB an object data type named SDO_GEOMETRY to store geometry. An application example of ORACLE spatial database demonstrated the advantages of OODB in describing spatial data and the efficiency in expressing compound object and processing spatial data compared to RDB which only stores meaningless data. Certainly, there are still some issues that need further research in OODB: which direction OODB will develop: pure OODB or object relation DB, the data model match between RDB and OODB, the mathematic basis and formalization for OODB and how to take advantages of existing mature technologies of RDB such as transaction control, integrity check, data reproduction in the development of OODB.

传统的关系数据库在GIS的应用中主要存在以下问题 :除数据类型简单 ,不能很好地表达非结构化数据外 ,也难以表示GIS中具有复杂结构的数据 ;关系模型简单 ,不能表达数据之间的层次 ,继承、聚合、泛化或特化等在GIS广泛使用的关系 ;与数据操纵语言如SQL和通用程序设计语言 ,特别是目前流行的面向对象设计语言之间失配 .采用面向对象技术可以较好地解决上述问题 .ORACLE的空间数据库在传统的关系数据库上进行了面向对象的扩展 ,即所谓对象 -关系模式 ,其核心在于增加了名为SDO_GEOMETRY的对象数据类型 ,用于存储几何实体 .ORACLE的空间数据库的应用示例表明 :以面向对象的形式表示空间数据比之于关系数据库中存放大量无意义的坐标有着很大的优势 ,同时 ,它在复合对象的表达方面 ,在对于空间关系的处理方面都非常有效

There are some problems of data model in GIS application.It is difficult for them to describ non-structured or complex-structured data in GIS and can't express the relation of inheritance,aggregations,and so on.While object-oriented(OO) technology may be useful to solve these problems. This paper describes the designing and the establishment of the Object Oriented(OO) geodatabase and also apply it in the geodatabase of the diggings and minerals by combining it with the particularity of the management in the...

There are some problems of data model in GIS application.It is difficult for them to describ non-structured or complex-structured data in GIS and can't express the relation of inheritance,aggregations,and so on.While object-oriented(OO) technology may be useful to solve these problems. This paper describes the designing and the establishment of the Object Oriented(OO) geodatabase and also apply it in the geodatabase of the diggings and minerals by combining it with the particularity of the management in the minerals.

传统的GIS数据模型难以表达非结构化数据和GIS中具有复杂结构的数据 ,更不能表达数据间继承、聚合等在GIS中广泛使用的关系。面向对象的技术则可以很好地解决上述问题。本文介绍了面向对象的地理数据库的设计和建立 ,并结合矿区矿产管理工作中的特殊性 ,通过实例分析了其在矿区矿产地理数据库建立中的应用。

Based on the third generation geography database model and the point-routing-boundary (PRB) data model, this paper explains that the PRB data stream stack is the inherited and transferred foundation of data models in different digital mapping stages. This is done by using the relationship between the PRB data stream stack and different-stage data model. It shows that the date model of the database, which includes the final-interpretable results, can inherit from the integration of the different-stage structure...

Based on the third generation geography database model and the point-routing-boundary (PRB) data model, this paper explains that the PRB data stream stack is the inherited and transferred foundation of data models in different digital mapping stages. This is done by using the relationship between the PRB data stream stack and different-stage data model. It shows that the date model of the database, which includes the final-interpretable results, can inherit from the integration of the different-stage structure and non-structure data model, and clarifies that the inherited and transferred technique of spatial and no spatial attributes have been implemented by using inter-operation between object class and feature class. At the same time, in terms of the data molding principle of the integrative describing geological map, organizing data and storing data, it is concluded that the PRB data model of the PRB geological map spatial database is composed of seventeen basic feature classes, six object classes and eight synthetic feature classes. This paper also defines and discusses some elements of the PRB data model, including entity names, feature and object class coding, spatial data types, entity relationships, primary and subordinate key names, coding of feature classes notation, and entity attributes.

以当前第三代地理数据库模型和PRB数据模型为基础 ,通过PRB数据流“栈”与不同阶段数据模型的关系说明PRB数据流“栈”是不同阶段数据模型继承和传递的基础 ;阐明了最终解释成果空间数据库的数据模型是在不同阶段结构化与非结构化数据模型关系上通过抽象与综合来实现“继承”的 ;用对象类和要素类的互操作来实现空间与非空间的属性继承传递 .同时 ,基于地质图一体化的描述、组织和存储的数据建模原则 ,得出了基于PRB数据模型为基础的PRB地质图空间数据库由 17个基本要素类、6个对象类、8个综合要素数据集构成 .并对实体名称、要素与对象编码、空间数据类型、实体间的关系、主关键字名称、子关键字名称、注释要素类编码、实体属性内容说明进行了定义和说明

 
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