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DEXA
2005
Springer
80views Database» more  DEXA 2005»
14 years 2 months ago
Optimizing I/O Costs of Multi-dimensional Queries Using Bitmap Indices
Bitmap indices are efficient data structures for processing complex, multi-dimensional queries in data warehouse applications and scientific data analysis. For high-cardinality at...
Doron Rotem, Kurt Stockinger, Kesheng Wu
GFKL
2005
Springer
141views Data Mining» more  GFKL 2005»
14 years 2 months ago
On External Indices for Mixtures: Validating Mixtures of Genes
Mixture models represent results of gene expression cluster analysis in a more natural way than ’hard’ partitions. This is also true for the representation of gene labels, such...
Ivan G. Costa, Alexander Schliep
ICMI
2005
Springer
119views Biometrics» more  ICMI 2005»
14 years 2 months ago
Region extraction of a gaze object using the gaze point and view image sequences
Analysis of the human gaze is a basic way to investigate human attention. Similarly, the view image of a human being includes the visual information of what he/she pays attention ...
Norimichi Ukita, Tomohisa Ono, Masatsugu Kidode
SSD
2005
Springer
105views Database» more  SSD 2005»
14 years 2 months ago
Evaluation of Top-k OLAP Queries Using Aggregate R-Trees
Abstract. A top-k OLAP query groups measures with respect to some abstraction level of interesting dimensions and selects the k groups with the highest aggregate value. An example ...
Nikos Mamoulis, Spiridon Bakiras, Panos Kalnis
DOLAP
2004
ACM
14 years 2 months ago
A new OLAP aggregation based on the AHC technique
Nowadays, decision support systems are evolving in order to handle complex data. Some recent works have shown the interest of combining on-line analysis processing (OLAP) and data...
Riadh Ben Messaoud, Omar Boussaid, Sabine Rabas&ea...