structural index meaning in English
结构指数
Examples
- This paper refers to the indexing technologies of b ~ + - tree in dbms , and combine it with the sparse numbering schema , and proposes a new indexed structure ? b ~ + - tree structural index . it is very important for the optimization of join operation and element location in xml query
本文将关系数据库中b树索引技术与sparsenumberingschema相结合，提出了一种新的xml文件索引结构? ? b ~ +树结构索引，它对xml查询中连接操作和元素定位操作的优化有着重要作用。 - Xml information retrieval syslem differs greatly from traditional information retrieval system in the construction of both inverted text index and structural index , the evaluation of both keyword based query and structure based query , and the effects of structural information on result relevance ranking
Xml信息检索系统与传统的信息检索系统不同，主要体现在：建立索引时不仅需要建立倒排文本索引，还需要建立结构信息索引；查询处理时不仅需要处理关键字查询条件，还需要处理结构化查询条件。 - To manage large - scale xml documents with complicated structure , this dissertation focus on the efficient structural indexing algorithm for xml data , result size estimation problem for xml structure based query optimization , result relevance ranking algorithm , and infrastructure for xml query processing for both text - rich and data - rich xml documents . to address the aforementioned issues , this dissertation makes the following contributions . first , it investigates the drawbacks of existing indexing algorithm for xml data , and propose a dynamic indexing algorithm for xml data based on d - bisimilarity , difx
为满足结构复杂、大规模的xml数据管理需要，本文深入研究了xml信息检索系统中的结构索引算法设计和结构化查询优化中的查询代价估计问题，以及查询结果和查询条件间的相关度算法，主要取得了4个方面的成果：第一，分析了已有的xml数据索引算法中存在的问题，提出了一种高效的动态xml结构索引算法difx ，它采用动态后向结构相似性( d - bisimilarity )的概念，可以根据实际查询需求以及索引最优化的要求动态决定索引中保存的结构信息。