Continuous similarity join over geo-textual data streams

Continuous similarity join over geo-textual data streams
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地理文本数据流的连续相似性连接

DOI:
10.1007/s11280-022-01063-w
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发表时间:
2022-06
期刊:
Springer Nature
影响因子:
--
通讯作者:
Guoren Wang
Guoren Wang
中科院分区:
其他
文献类型:
--
作者:
Hongwei Liu;Yongjiao Sun;Guoren Wang

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地理文本相似性连接是空间数据库中的一种基本操作。随着基于位置的社交媒体的持续扩散,地理文本数据在过去几十年中变得越来越可用。移动的用户和基于位置的服务提供商可能想要通过数据流接收多尺度地理文本对象的最新相似性联接结果。鉴于此,我们提出并研究了一个新的问题连续地理文本相似连接(CGTS-Join)。具体地,给定地理文本数据流上的地理文本对象Q的集合和地理文本对象P的动态集合,问题CGTS-Join是连续地维护包含对象对的最新连接结果集,使得每对对象彼此相似。为此,我们定义了一个有效的相似性度量,通过考虑空间,文本和时间方面来衡量两个地理文本对象之间的相似性。基于相似性度量,我们开发了一个混合网格索引结构(HGI)和三过滤框架,能够有效地回答CGTS连接问题。我们在两个真实世界的数据集上进行了广泛的实验,以确认我们所提出的方法的性能优越性。
Geo-textual similarity join is a fundamental operation in spatial databases. With the continued proliferation of location-based social media, geo-textual data is becoming increasingly available over the past decades. Mobile users and location-based service providers may want to receive up-to-date similarity join results of massive-scale geo-textual objects over data streams. In this light, we propose and study a novel problem of Continuous Geo-Textual Similarity Join (CGTS-Join). Specifically, given a collection of geo-textual objects Q and a dynamic set of geo-textual objects P over geo-textual data streams, the problem CGTS-Join is to continuously maintain an up-to-date join result set containing object pairs such that the objects of each pair are similar to each other. For the purpose, we define an effective similarity metric that measures the similarity between two geo-textual objects by taking spatial, textual, and temporal aspects into consideration. Based on the similarity metric, we develop a Hybrid Grid Indexing Structure (HGI) and a tri-filtering framework that is capable of answering the CGTS-Join problem efficiently. We conduct extensive experiments on two real-world datasets to confirm the performance superiority of our proposed method.
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