208 search results - page 5 / 42 » Indexing range sum queries in spatio-temporal databases |
DEXA
2008
Springer
13 years 9 months ago
2008
Springer
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...
MIR
2004
ACM
14 years 1 months ago
2004
ACM
An increasing amount of heterogeneous information about scientific research is becoming available on-line. This potentially allows users to explore the information from multiple p...
PODS
2009
ACM
14 years 8 months ago
2009
ACM
The B-tree is a fundamental external index structure that is widely used for answering one-dimensional range reporting queries. Given a set of N keys, a range query can be answere...
ICDE
1999
IEEE
14 years 9 months ago
1999
IEEE
Range sum queries on data cubes are a powerful tool for analysis. A range sum query applies an aggregation operation (e.g., SUM) over all selected cells in a data cube, where the ...
VLDB
2004
ACM
14 years 1 months ago
2004
ACM
Database outsourcing is an emerging data management paradigm which has the potential to transform the IT operations of corporations. In this paper we address privacy threats in da...