摘要
研究海量文本动态索引的构造方法,通过对索引维护策略的研究和对比,设计了一个优化的索引模型,在保证检索效率的前提下,提供了实时索引的功能;提出了一种分代的动态索引构建方法,以减少索引合并代价,同时可以调节索引和检索的性能平衡,与以前方法相比,具有更高的性能和更好的规模可扩展性,并在理论和实践中验证了这种索引维护方法的高效性.
Dynamic indexing for large-scale collections was compared, and a model for optimized index maintenance was designed. In the new model, real-time indexing was improved in index construction, with ensured search efficiency. The model also built index for dynamic collections, and used sub-indexing to reduce combination cost, with indexing and retrieval adjustable when needed. This model has higher performance and better scalability, and performed excellently in experiments when compared with previous methods.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期134-137,共4页
Journal of Beijing Normal University(Natural Science)
基金
山东省自然科学基金资助项目(Y2007G19)
关键词
动态文档集
索引构建
索引维护
dynamic collection
index construction
index maintenance
