Abstract
Data in an information system are usually represented and stored in a flat and unconnected structure as in a table. Underlying the data structure, there is a domain concept that is an understandable description for humans and supports other machine learning techniques. In this work, Map Granule (MG) construction is introduced. A MG comprises of multilevel granules with their hierarchy relations. We propose a rough set based granular computing to induce approximation of a domain concept hierarchy of an information system. An algorithm is proposed to select a sequence of attribute subsets which is necessary to partition a granularity hierarchically. In each level of granulation, reducts and core are applied to retain the specific concepts of a granule whereas common attributes are applied to exclude the common knowledge and generate a more general concept. The information granule relations are represented by a tree structure in which the relation strengths are defined by a rough ratio of specificness/coarseness.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Pawlak, Z.: Rough Sets. In Theoretical Aspects of Reasoning about Data. Kluwer, Dordrecht (1991)
Priss, U.: Formal Concept Analysis in Information Science. Annual Review of Information Science and Technology number 40 (2006)
Yao, Y.Y.: Information Granulation and Rough Set Approximation. International Journal of Information Systems 16, 87–104 (2001)
Yao, Y.Y., Yao, J.T.: Granular Computing as a Basis for Consistent Classification Problems. In: Proceedings of PAKDD’02 Workshop on Toward the Foundation of Data Mining 2002, pp. 101–106 (2002)
Hoa, N.S., Son, N.H.: Rough Set Approach to Approximation of Concepts from Taxonomy. In: Proc. of Knowledge Discovery and Ontologies Workshop (KDO-04) at ECML/PKDD 2004, pp. 13–24 (2004)
Bazan, J.G., Szczuka, M.: The Rough Set Exploration System. In: Peters, J.F., Skowron, A. (eds.) Transactions on Rough Sets III. LNCS, vol. 3400, pp. 37–56. Springer, Heidelberg (2005)
Bargiela, A., Pedrycz, W.: Granular Computing: An Introduction, pp. 11–16. Springer, Heidelberg (2002)
Yao, Y.Y.: Granular computing using neighborhood systems. Advances in Soft Computing: Engineering Design and Manufacturing. In: Roy, R., Furuhashi, T., Chawdhry, P.K. (eds.) WSC3. The 3rd On-line World Conference on Soft Computing, June 21-30, 1998, pp. 539–553. Springer, London (1999)
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2007 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Sonamthiang, S., Cercone, N., Naruedomkul, K. (2007). A Rough Set Based Map Granule. In: Kryszkiewicz, M., Peters, J.F., Rybinski, H., Skowron, A. (eds) Rough Sets and Intelligent Systems Paradigms. RSEISP 2007. Lecture Notes in Computer Science(), vol 4585. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73451-2_31
Download citation
DOI: https://doi.org/10.1007/978-3-540-73451-2_31
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-73450-5
Online ISBN: 978-3-540-73451-2
eBook Packages: Computer ScienceComputer Science (R0)