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» On the Representation of Timed Polyhedra
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APCCM
2006
15 years 7 months ago
A conceptual solution for representing time in data warehouse dimensions
Data Warehouses (DWs) use an omnipresent time dimension for keeping track of changes in measure values. However, this dimension cannot be used to model changes in other dimensions...
Elzbieta Malinowski, Esteban Zimányi
LICS
2005
IEEE
15 years 12 months ago
A Polynomial Time Presburger Criterion and Synthesis for Number Decision Diagrams
Number Decision Diagrams (NDD) are the automatabased symbolic representation for manipulating sets of integer vectors encoded as strings of digit vectors (least or most significa...
Jérôme Leroux
ICALP
2005
Springer
15 years 12 months ago
Facility Location in Sublinear Time
Abstract. In this paper we present a randomized constant factor approximation algorithm for the problem of computing the optimal cost of the metric Minimum Facility Location proble...
Mihai Badoiu, Artur Czumaj, Piotr Indyk, Christian...
AIME
2001
Springer
15 years 10 months ago
NasoNet, Joining Bayesian Networks and Time to Model Nasopharyngeal Cancer Spread
Abstract. Cancer spread is a non-deterministic dynamic process. As a consequence, the design of an assistant system for the diagnosis and prognosis of the extent of a cancer should...
Severino F. Galán, Francisco Aguado, Franci...
FORMATS
2006
Springer
15 years 10 months ago
On the Computational Power of Timed Differentiable Petri Nets
Abstract. Well-known hierarchies discriminate between the computational power of discrete time and space dynamical systems. A contrario the situation is more confused for dynamical...
Serge Haddad, Laura Recalde, Manuel Silva