@inproceedings{c43f8c9350154ffa99cda47b0fd32b60,
title = "Getting qualified answers for aggregate queries in spatio-temporal databases",
abstract = "In many applications, such as road traffic supervision and location based mobile service in large cities, moving objects continue to generate large amount of spatio-temporal information in the form of data streams. How to get qualified answers for aggregate queries appears to be a big challenge due to the high dynamic nature of data streams. Previous methods (e.g., AMH[11]) mainly focus on efficient organization of spatio-temporal information and rapid response time, not the quality of the answer. Our main contribution is a novel method to process important aggregate queries (e.g. SUM and AVG) based on a new structure (named AMH*) to summarize spatio-temporal information. The analysis in theory shows that the relative error and (/or) absolute error of answers can be ensured smaller than predefined parameters. A series of extended experiments evaluate the correctness of our approach.",
author = "Cheqing Jin and Weibin Guo and Futong Zhao",
year = "2007",
doi = "10.1007/978-3-540-72524-4\_25",
language = "英语",
isbn = "9783540724834",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "220--227",
booktitle = "Advances in Data and Web Management - Joint 9th Asia-Pacific Web Conference, APWeb 2007 and 8th International Conference on Web-Age Information Management, WAIM 2007, Proceedings",
address = "德国",
note = "Joint 9th Asia-Pacific Web Conference on Advances in Data and Web Management, APWeb 2007 and 8th International Conference on Web-Age Information Management, WAIM 2007 ; Conference date: 16-06-2007 Through 18-06-2007",
}