反最近关键字聚集查询方法研究

摘要

Currently the keyword queries in spatiotemporal database are the simple traditional query mostly.With the further development of location-based service ( LBS) , new type applications emerge as well, in these new applications the objects do not only contain position in-formation, but also contain location-related text information such as name, style and so on, so traditional query is no longer applicable.In or-der to be able to handle spatiotemporal query efficiently, this paper proposes a novel spatiotemporal keyword query, known as the reverse ag-gregate nearest keyword query.%当前时空数据库中的关键字查询大多数都是简单的传统查询。随着基于位置服务（ LBS）的进一步发展，新类型的应用也随之出现，这些新的应用中的对象不仅包含位置信息，还包含和位置相关的文本信息，例如名字、类型等等，传统查询不再适用。为了能够高效地处理时空查询，提出一种新颖的时空关键字查询类型，称为反最近关键字聚集查询。