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SIGMOD
1997
ACM
134views Database» more  SIGMOD 1997»
13 years 11 months ago
Similarity-Based Queries for Time Series Data
We study similarity queries for time series data where similarity is defined in terms of a set of linear transformations on the Fourier series representation of a sequence. We ha...
Davood Rafiei, Alberto O. Mendelzon
BXML
2003
13 years 8 months ago
Querying transformed XML documents: Determining a sufficient fragment of the original document
Large XML documents which are stored in an XML database can be transformed further by an XSL processor using an XSLT stylesheet. In order to answer an XPath query based on the tran...
Sven Groppe, Stefan Böttcher
DEXA
2008
Springer
154views Database» more  DEXA 2008»
13 years 9 months ago
Approximate Range-Sum Queries over Data Cubes Using Cosine Transform
In this research, we propose to use the discrete cosine transform to approximate the cumulative distributions of data cube cells' values. The cosine transform is known to have...
Wen-Chi Hou, Cheng Luo, Zhewei Jiang, Feng Yan, Qi...
ENTCS
2006
172views more  ENTCS 2006»
13 years 7 months ago
Locality of Queries and Transformations
Locality is a standard notion of finite model theory. There are two well known flavors of it, based on Hanf's and Gaifman's theorems. Essentially they say that structure...
Leonid Libkin
ICDE
1997
IEEE
90views Database» more  ICDE 1997»
13 years 11 months ago
A Rule Engine for Query Transformation in Starburst and IBM DB2 C/S DBMS
Hamid Pirahesh, T. Y. Cliff Leung, Waqar Hasan