M2SP: Mining Sequential Patterns Among Several Dimensions

M Plantevit, YW Choong, A Laurent, D Laurent… - Knowledge Discovery in …, 2005 - Springer
Mining sequential patterns aims at discovering correlations between events through time.
However, even if many works have dealt with sequential pattern mining, none of them …

Extracting semantics from data cubes using cube transversals and closures

A Casali, R Cicchetti, L Lakhal - Proceedings of the ninth ACM SIGKDD …, 2003 - dl.acm.org
In this paper we propose a lattice-based approach intended for extracting semantics from
datacubes: borders of version spaces for supervised classification, closed cube lattice to …

Lossless reduction of datacubes using partitions

A Casali, S Nedjar, R Cicchetti, L Lakhal… - International Journal of …, 2009 - igi-global.com
Datacubes are especially useful for answering efficiently queries on data warehouses.
Nevertheless the amount of generated aggregated data is huge with respect to the initial …

Emerging Cubes for Trends Analysis in Olap Databases

S Nedjar, A Casali, R Cicchetti, L Lakhal - Data Warehousing and …, 2007 - Springer
In various approaches, data cubes are pre-computed in order to efficiently answer Olap
queries. Such cubes are also successfully used for multidimensional analysis of data …

Closed cube lattices

A Casali, S Nedjar, R Cicchetti, L Lakhal - New Trends in Data …, 2008 - Springer
In this paper we propose a lattice-based approach intended for summarizing the Data
Cubes. With this intention, we introduce a novel concept: the cube closure over the cube …

Extracting semantics in OLAP databases using emerging cubes

S Nedjar, R Cicchetti, L Lakhal - Information Sciences, 2011 - Elsevier
Data cubes capture general trends aggregated from multidimensional data from a
categorical relation. When provided with two relations, interesting knowledge can be …

Emerging cubes: Borders, size estimations and lossless reductions

S Nedjar, A Casali, R Cicchetti, L Lakhal - Information Systems, 2009 - Elsevier
Discovering trend reversals between two data cubes provides users with a novel and
interesting knowledge when the real world context fluctuates: What is new? Which trends …

Mining borders of the difference of two datacubes

A Casali - Data Warehousing and Knowledge Discovery: 6th …, 2004 - Springer
In this paper we use the novel concept of minimal cube transversals on the cube lattice of a
categorical database relation for mining the borders of the difference of two datacubes. The …

Modelling higher dimensional data for GIS using generalised maps

K Arroyo Ohori, H Ledoux, J Stoter - International Conference on …, 2013 - Springer
Real-world phenomena have traditionally been modelled in 2D/3D GIS. However, powerful
insights can be gained by integrating additional non-spatial dimensions, such as time and …

Convex cube: Towards a unified structure for multidimensional databases

A Casali, S Nedjar, R Cicchetti, L Lakhal - Database and Expert Systems …, 2007 - Springer
In various approaches, data cubes are pre-computed in order to efficiently answer Olap
queries. Such cubes are also successfully used for multidimensional analysis of data …