基于时间的空间文本关键词skyline查询

Time based spatial text keyword skyline query

在移动互联网环境下,空间文本skyline查询可以有效支持用户在空间和关键词方面的查询。随着需求的多样性,基于用户经常会同时考虑空间距离、数值型信息、关键词和时间等因素对查询结果的影响,提出了基于时间的空间文本关键词skyline查询(Time based Spatial Text Keyword Skyline Query,TSTKSQ),用来查找在空间、数值、关键词和时间都满足条件的优秀对象,设计了基于时间的空间文本关键词skyline查询的索引结构STTR-Tree,提出了关键词、时间和时空关键词相关性的评价函数,在裁剪策略的基础上提出了skyline查询算法。通过实验结果分析,验证了算法的准确性和有效性。

In the mobile Internet environment,spatial text skyline queries can effectively support users′queries in terms of space and keywords.With the diversity of needs,based on the fact that users often consider the influence of spatial distance,numerical information,keywords and time on query results at the same time,a Time based Spatial Text Keyword Skyline Query(TSTKSQ)is proposed to find the spatial,numerical,keyword and time are satisfied with the conditions of the excellent object.The index structure STTR-Tree for time based spatial text keyword skyline query is designed,the evaluation functions of keyword,time and spatio-temporal keyword relevance is proposed,and the skyline query algorithm is proposed on the basis of the tailoring strategy.The accuracy and effectiveness of the algorithm are verified through the analysis of experimental results.