电子学报Issue(2)：209-216,8.DOI:10.3969/j.issn.0372-2112.2014.02.001
Extractor：支持查询重构的高效数据库关键词检索系统
Extractor：A Query-Reformulation Embedded Efficient Keyword Search System over Relational Databases
摘要
Abstract
Keyword Search over Relational Databases (KSORD) ,a more straightforward and user-friendly way of retriving data in relational databases ,has raised much attention and been widely studied in recent years .However ,there are still some prob-lems in the existing techniques .To solve these problems ,Extractor ,a new KSORD system based on datagraph ,is proposed in this paper .The datagraph used by Extractor is derived from exiting datagraphs ,which has been improved a lot and the new features are the bases of the new generating and ranking mechanism of result trees used in Extracor .The interactive query-reformulation method based on word co-occurence is also embedded in Extractor to help users find the right query .Experiments verify the effectiveness and efficiency of Extractor .关键词
检索/关系数据库/查询重构/top-k检索Key words
search/relational database/query reformulation/top-k query分类
信息技术与安全科学引用本文复制引用
王新军,闫实,彭朝晖,李庆忠..Extractor：支持查询重构的高效数据库关键词检索系统[J].电子学报,2014,(2):209-216,8.基金项目
国家自然科学基金（No ．61170052；No ．61100167）；国家科技支撑计划（No ．2012BAH54F04）；山东省自然科学基金 （）
