| 基于本体的数据库元搜索引擎域映射 |
| |
| 引用本文： | 苗广祥,陈向阳.基于本体的数据库元搜索引擎域映射[J].东南大学学报,2007,23(3):357-360. |
| |
| 作者姓名： | 苗广祥 陈向阳 |
| |
| 作者单位： | 保定电力职业技术学院 保定071051(苗广祥)，河北大学数学与计算机学院 保定071002(陈向阳) |
| |
| 摘 要： | 为了实现数据库元搜索引擎在语义层次上的映射,采用本体作为信息的组织形式,并记录本体中没有的新词,当使用新词的频率超过一定阈值时,加入到本体库中,对本体进行扩充.查询过程支持"与"和"或"布尔运算.为了提高系统的映射速度,特别添加了一个记忆模块,记录用户近期的查询行为.并在映射过程中自动学习用户的查询兴趣,以此动态决定实例表的查询顺序.实验证明这些方法可以显著降低系统平均映射时间.
|
| 关 键 词： | 本体 域映射 数据库元搜索引擎 记忆模块 |
| 修稿时间： | 2007-05-18 |
Domain semantic mapping of database metasearch engine |
| |
| Miao Guangxiang,Chen Xiangyang.Domain semantic mapping of database metasearch engine[J].Journal of Southeast University(English Edition),2007,23(3):357-360. |
| |
| Authors: | Miao Guangxiang Chen Xiangyang |
| |
| Institution: | 1 Baoding Technical College of Electric Power, Baoding 071051, China;2 College of Mathematics and Computer, Hebei University, Baoding 071002, China |
| |
| Abstract: | In order to implement semantic mapping of database metasearch engines,a system is proposed,which uses ontology as the organization form of information and records the new words not appearing in the ontology.When the new word's frequency of use exceeds the threshold,it is added into the ontology.Ontology expansion is implemented in this way.The search process supports "and" and "or" Boolean operations accordingly.In order to improve the mapping speed of the system,a memory module is added which can memorize the recent query information of users and automatically learn the user's query interest during the mapping which can dynamically decide the search order of instances tables.Experiments prove that these measures can obviously reduce the average mapping time. |
| |
| Keywords: | ontology domain mapping database metasearch engine memory module |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
