数据库基础 meaning in Chinese
basis of database
introduction to database
Examples
- According to the requirements of the analysis of modern highway management decision , the systematic objective , logical design , systematic construction and the way to put data warehouse into practice of highway management are presented , those are based on the highway management databases
根据现代公路管理决策分析的需求，提出了基于公路管理业务数据库基础之上的公路管理数据仓库的系统目标、逻辑设计、体系结构和实现方法。 - For the data with quantitative attribute , several unsupervised discretization methods of continuous features are discussed . three simple boolean discretization methods ( equal width , equal frequency and cluster ) and fuzzy discretization are simulated based on a real population statistical database
随后针对数据库中的模拟量属性，分析了非监督定量属性离散化的几种方法，在一个统计数据库基础上仿真研究了分别基于等宽、等频和聚类的布尔型分段离散化方法和模糊离散化方法。 - Discovery of association rules is an important class of data mining whose aim is to capture the co - occurrences of itemsets , the most important thing to do is to find the large itemsets effectively , because this is time consuming and will finally decide the efficiency of algorithms . so now the main study is emphasized on how to find the large itemsets with more and more few time
关联规则是从历史的大规模的数据中获得项集之间的相互关联关系，抽取出有用的和感兴趣的模式，主要任务是发现数据库中的大项集，因为这个任务在大规模数据库基础上是耗时的操作，所以现在的主要研究方向都集中在大项集的有效生成上。 - Discovery of association rules is an important class of data mining whose aim is to capture the co - occurrences of itemsets , the most important thing to do is to find the large itemsets effectively , because this is time - consuming and will finally decide the efficiency of algorithms . so now the main study is emphasized on how to find the large itemsets with more and more few times
关联规则是从历史的大规模的数据中获得项集之间的相互关联关系，抽取出有用的和感兴趣的模式，主要任务是发现数据库中的大项集，因为这个任务在大规模数据库基础上是耗时的操作，所以现在的主要研究方向都集中在大项集的有效生成上。 - The scientific and standard parameter management for rp system information is implemented . the process planning technology of rp system based on database is studied which includes stl model library management , computer aided choice of forming equipment and forming process , and the comprehensive automatic process planning technology
对rp系统信息进行了科学规范的参数化管理，研究了数据库基础上的快速成型系统工艺规划技术： stl模型库管理，成型设备和成型工艺的计算机辅助选择，综合式自动工艺规划技术。