实体关系模型

使用实体关系模型是一种定义DSL的形式。

Using an entity-relationship model is one form of defining a DSL .

元模型相对容易理解；它们与实体关系模型非常相似。

Metamodels are relatively easy to understand ; they are similar to an entity-relationship model .

ERP系统中对象模型向实体关系模型的映射

Oriented object model mapping to entity relation model in ERP system

目前关系数据库的传统建模方法是使用实体关系模型（ER模型）。

At present the traditional modeling technology of relational database is entity relationship model ( ER model ) .

正如实体关系模型是OLTP应用的基础一样，数据立方体模型是OLAP应用的数据基础。

Just as Entity-Relation model is the foundation of OLTP application , OLAP has data cube model as its foundation .

基于智能Agent的实体关系模型多程序代码自动生成方法研究计算机控制系统要完成I／O控制、过程控制和数据通信等多项任务，因此是一个多道程序系统。

A METHOD : TRANSFORM ENTITY-RELATIONSHIP SCHEME INTO MULTIPROGRAMMING CODE AUTOMATICALLY BASED ON INTELLIGENT AGENT THEORY Computer control system is a multi programming system by which the I / O control , process control and digital communication are carried out .

本文针对EDOC中的实体关系模型建立了从这些模型到J2EE平台模型以及目标代码的模型转换规则。

In this paper , we focus on the problem of how to define transformation rules from EDOC entity and relationship models to concrete implementations on J2EE platform .

首先根据miniPACS所处理数据的特性和DICOM服务所规定的实体关系模型构建了数据库。

Firstly the paper builds up a database according to the characteristics of data processed by miniPACS and the the entity-relation model described in DICOM ;

在系统设计阶段，进行总体设计，并按照MOF规范建立一系列系统的设计模型，主要包括实体关系模型、值对象模型、活动图模型等。

In the system design phase , the overall design , and in accordance with the MOF to establish a system design specification model , including entity-relationship models , the value object models and activity diagram models .

由于这类系统目前是基于关系型数据库来实现的，所以要求在面向对象模型（OOM）和实体关系模型（ERM）之间具有规范且稳定的映射方法，以便于构件的构造。

As this kind of system is based on the relation model database to realize at present . It is necessary to develop canonical and steady mapping methods between the Oriented Object Model ( OOM ) and the Entity Relation Model ( ERM ) in order to construct the components .

实体关系模型的面向对象实现

An Object-oriented Implementation of an Entity Relationship Model

介绍了实体关系模型和多维模型，重点分析了其建模技术的基本原理；

Entity-relation model and multidimensional model are introduced respectively with a focus on their basic principles .

实体关系模型相对易于捕获、易于维护、易于使用工具来支持，并且概念通常得到了很好的理解。

Entity-relationship models are relatively easy to capture , easy to maintain , easy to support with tooling , and the concepts are generally well understood .

采用非确定性网络实体关系模型构造概率编码本，引入虚拟伴生告警解决了孤立告警故障问题。

The non-deterministic network entity relationship models are used to construct probabilistic codebook , and the isolated alarm fault problem is solved by the idea of virtual concomitant alarm .

本文在实体关系模型的基础上研究了装配尺寸链的自动生成算法，在一维尺寸链生成算法中提出基于搜索方向的配合关系图生成的新算法。

The algorithm of generating assembly dimension chain automatically based on entity relationship model and a new algorithm in 1D based on searching direction which can generate mating relation graph are proposed .

接着进行系统数据库设计，主要做了业务流程分析、实体关系模型设计、建立数据库字典、数据流程设计和系统功能的具体实现。

Then date base system is designed which includes analyzing professional work flow , designing entity-relationship date model , building date base dictionary , designing data flow and fulfilling specifically system function .

并借助对该领域的核心业务流程分析，及周边业务流程的分析，对珠宝检测领域进行建模，得出该领域的特征模型、实体关系模型以及功能模型。

With analysis of the material business process of field and correlative business process , model identification field of jewelry and get characteristic model , entity-relation model and functional model of this field .

多维模型是数据仓库概念设计不可缺少的工具，将传统数据库实体关系模型直接转换到多维模型，势必在很大程度上缩短数据仓库系统的开发周期。

Multidimensional modeling is one of the chief techniques in conceptual design of data warehouse . If ER models of traditional databases can be directly transformed into multidimensional models , it would efficiently shorten the life circle of data warehouse design .

首先介绍了高速公路及其收费系统的发展现状以及发展趋势，并从系统架构、数据流程、实体关系模型等方面对提出的电子收费系统进行设计。

Firstly , this thesis introduces the research present situation and the development tendency of highway and its electronic toll collection system , designs the electronic toll collection system from several aspects of system architecture , data flow , entity relationship model and so on .

首先是数据管理系统的简单回顾，然后是分析学生注册系统，包括：关系数据管理系统中的实体关系数据模型，学生注册系统的关系表，用MicrosoftAccess创建数据表。

Then we analyze student 's registration system , which includes : the E-R model with RDBMS and relational tables of student 's registration system and creation of database tables using Microsoft Access .

为了实现这些，我们使用了公用EA模型，例如业务过程模型以及实体-关系模型。

To do so , common EA models used in this organization have been used , i.e. , business process models and entity-relationship models .

TER模型不仅具有实体-关系模型的优点，而且还具备面向对象模型所具有的很多性质，表达能力强。

TER model not only has the properties of the Entity - Relationship model , but also possesses those of the object-oriented model , with a powerful ability for expression .

但是，如果大多数数据更适合采用高度结构化的实体-关系模型，数据不太像文档并且关系更复杂，那么选择NXD可能并不合适。

If , however , the majority of your data fits better in a highly structured entity-relationship model and is less document-like and more intertwined , then choosing an NXD might not help your situation .

为了捕获概念性的实体-关系模型，为每一个复合数据建立一个关系模型元素。

For each CompositeData , an Entity model element is also created in order to capture conceptual entity-relationship models .

关系和集合为一类类构造子，体现了实体关系数据模型的思想；

In the model described , class is collection and constructor of object logic identifiers , relation and set are class constructors , and type is collection of properties .

系统设计和开发以福利院日常业务主线为基础，详细开发福利院需求，然后对系统进行设计，使用实体-关系模型研究和建立系统数据库。

System design and development , based on the main day-to-day business of the social welfare institutions , explore its requirements and then design the system by using E-R Model and establishing system database .

论文介绍了考试系统的开发初衷和背景，系统的开发工具，结构化开发的具体步骤，其中包括实体-关系模型，数据流图，功能结构图等必要的图形说明。

The thesis introduced background and intention of the system , the development tool , the detailed step of the structured development . It includes some diagrams of E-R module , data flow and functional structure for explaining .

从支持一般决策过程的角度出发，提出了一种通用的空间决策支持系统信息模型，即实体关系问题模型，最后给出了基于实体关系问题模型的空间数据仓库构建方法。

This paper proposes an universal , general-decision-oriented information model , entities-relations-problems , for spatial decision support system . At the end of the paper , the construction method of spatial data warehouse based on entities-relations-problems information model is discussed .

为简化PKI实施，我们设计了一个PKI实体的对象关系模型。

For easy implementation we designed an object relationship model for PKI entity .

时态实体-关系数据模型TER的研究

Studies on temporal entity relationship data model