采用实体联系模型方法建立了软件开发过程风险各部件的实体模型；
The entity model of components of software development risk is created with the means of entity relation.
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.
用扩展的实体—联系方法描述学科体系结构的概念模型。
The conceptual model of the discipline architecture is represented through an extended entity-relationship approach.
工程信息与实体模型联系紧密，方便了数据的读取和存储，使工程数据的管理安全有序。
Because the structure information associates with the entity model directly, it is easy to read and save the datas and safe to manage them.
空间数据模型是关于现实世界中空间实体及其相互间联系的概念。
Spatial data model is based on the principle of spatial entities and relationship between mutual.
介绍了实体-联系模型中出现的扇形陷阱和深坑陷阱，分析了两种连接陷阱产生的原因及导致的后果并提出了问题的解决方法。
This paper introduces the fan and chasm traps in ER models, analyses the causes and problems of connection traps, and presents the solution for the problems.
数据库设计：通常，OLTP系统采用实体-联系(ER)模型和面向应用的数据库设计。
Database design: an OLTP system usually adopts an entity-relationship (ER) data model and an application -oriented database design.
采用实体联系图工具设计了系统的信息模型，并构建了系统的数据库物理信息模型。
Used the E-R graph tool to design the system information model, and has constructed the system database physical information model.
其次，在分析切削数据之间联系的基础上，设计了金属切削数据的实体模型（E—R图）。
The relationships of information process in these parts are analysed, and then the Entity-Relation (E-R) diagram of machinability data is designed according to the analysis of machinability data.
通过对地籍系统中实体、联系、属性的分析，提出了地籍数据库的实体模型。
The author presents an entity mode of CDB after analyzing the entity, relation, attribute of Cadastral system.
本文提出了包含组织纵向和横向结构的组织元模型，并采用UML对象约束语言(ocl)描述了元模型中实体与实体之间的联系和约束关系。
In this paper, an organization meta-model including both hierarchy and teamwork structure is presented and then UML object constraint language (OCL) is adopted to formalize the meta-model.
本文提出了包含组织纵向和横向结构的组织元模型，并采用UML对象约束语言(ocl)描述了元模型中实体与实体之间的联系和约束关系。
In this paper, an organization meta-model including both hierarchy and teamwork structure is presented and then UML object constraint language (OCL) is adopted to formalize the meta-model.
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