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ICDE
2004
IEEE
15 years 12 months ago
2004
IEEE
We examine the problem of evaluating selection queries over imprecisely represented objects. Such objects are used either because they are much smaller in size than the precise on...
SIGMOD
2003
ACM
15 years 10 months ago
2003
ACM
While work in recent years has demonstrated that wavelets can be efficiently used to compress large quantities of data and provide fast and fairly accurate answers to queries, lit...
EDBT
2004
ACM
15 years 10 months ago
2004
ACM
Abstract. Hierarchical clustering has been proved an effective means for physically organizing large fact tables since it reduces significantly the I/O cost during ad hoc OLAP quer...
DEXA
2009
Springer
15 years 5 months ago
2009
Springer
The alignment of noisy and uniformly scaled time series is an important but difficult task. Given two time series, one of which is a uniformly stretched subsequence of the other, w...
AMFG
2005
IEEE
15 years 4 months ago
2005
IEEE
Non-negative matrix factorization (NMF) is a recently developed method for finding parts-based representation of non-negative data such as face images. Although it has successfully...