摘要
为了解决矿用人员定位跟踪系统数据库冗余性大,数据相关性强的问题,采用目前最流行数据库建模规则,详细分析了系统需求,总结出人员定位跟踪系统 E-R 模型图,并对实体集和联系集进行了规范化,最后按照一定的映射规则,建立了数据模型。
In order to solve the problems of high redundancy and strong relativity in the database of personnel tracking and locating system （PTLS） for the coalmine, this paper adopts the most popular modeling rules to analyze the requirements of the system. It summarizes the E-R model of the PTLS and standardizes the entity set and relationship set. Finally, according to some mapping rules, it generalizes the data model in application.
出处
《矿山机械》
北大核心
2008年第22期42-45,共4页
Mining & Processing Equipment
关键词
数据模型
数据库
人员定位跟踪系统
Data model
Database
Personnel tracking and locating system
