关键词有序排列的全文检索算法  

Full-Text Retrieval Method Based on Ordered Key Words

作　　者：杨珺[1] 毕忠勤[1] 杜海舟[1] 

机构地区：[1]上海电力学院计算机科学与技术学院,上海200090

出　　处：《上海电力学院学报》2013年第4期395-398,403,共5页Journal of Shanghai University of Electric Power

基　　金：国家自然科学基金(61073189;61272437);上海市优秀青年教师基金(sdl10010)

摘　　要：针对各检索词在整个查询中的权重不同和由检索词组合顺序不同而导致的暗含语义差异的问题,利用正排索引和倒排索引的结构特点,在基于倒排索引和向量空间检索模型的基础上加入相应的预处理算法,提出了查询步进和文档步进的概念,并分析了由此对检索带来的影响,给出了与检索词排列顺序相关的全文检索方法.In order to resolve the semantic difference caused by the order of the searching words or different weight of the searching words, the structures of forward index and inverted index are analyzed firstly, then pre-processing method based on inverted index and vector space model is proposed. The concept of document step and retrieval step is given with its effect on retrieval results. Finally, the full-text retrieval method based on ordered key words is demonstrated.

关 键 词：倒排索引 向量空间模型 语义检索 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]