【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.更多还原

【Abstract】 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.更多还原