Abstract
Within the pattern mining area, skypatterns enable to express a user-preference point of view according to a dominance relation. In this paper, we deal with the introduction of softness in the skypattern mining problem. First, we show how softness can provide convenient patterns that would be missed otherwise. Then, thanks to Constraint Programming, we propose a generic and efficient method to mine skypatterns as well as soft ones. Finally, we show the relevance and the effectiveness of our approach through experiments on UCI benchmarks and a case study in chemoinformatics for discovering toxicophores.
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Notes
- 1.
- 2.
The closed constraint is used to reduce pattern redundancy. Indeed, closed skypatterns make up an exact condensed representation of the whole set of skypatterns (Soulet et al. 2011).
- 3.
- 4.
Obviously, it is the same for both methods.
- 5.
They correspond to edge-skypatterns that are not hard skypatterns.
- 6.
They correspond to \(\delta \)-skypatterns that are neither hard skypatterns neither edge-skypatterns.
- 7.
Lethal concentration of a substance required to kill half the members of a tested population after a specified test duration.
- 8.
A fragment denominates a connected part of a chemical structure containing at least one chemical bond.
- 9.
European Chemicals Bureau: http://echa.europa.eu/.
- 10.
A chemical Ch contains an item A if Ch supports A, and A is a frequent subgraph of \(\mathscr {T}\).
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Acknowledgments
This work is partly supported by the ANR (French Research National Agency) funded project FiCOLOFO ANR-10-BLA-0214. The authors would like to thank Arnaud Soulet (University François Rabelais of Tours, France), for providing the Aetheris program and his highly valuable comments.
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Ugarte, W., Boizumault, P., Loudni, S., Crémilleux, B., Lepailleur, A. (2016). Mining (Soft-) Skypatterns Using Constraint Programming. In: Guillet, F., Pinaud, B., Venturini, G., Zighed, D. (eds) Advances in Knowledge Discovery and Management. Studies in Computational Intelligence, vol 615. Springer, Cham. https://doi.org/10.1007/978-3-319-23751-0_6
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