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A Granular Computing Paradigm for Concept Learning

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prentice
14 diapositives · 298 Views · Sep 17, 2014

This document outlines the relationship between granular computing and concept learning. It defines key concepts such as "intension" and "extension," discussing how both humans and machines acquire knowledge about concepts. A model for concept learning is introduced, highlighting partition-based and covering-based strategies. The applications of this approach are showcased through examples, including a dancing spider robot and cancer diagnosis technologies. This exploration aims to construct meaningful learning structures to derive effective classification rules.

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A Granular Computing Paradigm for Concept Learning
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  1. A Granular Computing Paradigmfor Concept Learning Xiaofei Deng Ph.D. Candidate Department of Computer Science

  2. Outline • Concept learning • Granular computing • A model for concept learning • Applications

  3. What is concept learning? • What is a concept? • Basic unit of human thought • The classical view: intension & extension • A concept is a triplet: • (name, intension, extension), • (natural language, description, example)  “intension” comes from logic, it indicates the internal content of a term or concept that constitutes its formal definition

  4. The classical view of concepts “dog” name: A concept descriptions of “dog” intension: extension: four legs bites loyalty barks man’s best friend

  5. How do humans learn a concept? • Two tasks of concept learning • Describe a concept by its intension • Derive relations between concepts • An example: Intension of known concept  Intension of new concept http://www.shutterstock.com

  6. How do machines learn a concept? • Learn classification rules • An example: • A classification tree: Weekend=Yes and Raining=No  Canoeing = Yes Weekday=Yes  Canoeing = No … http://www.shutterstock.com

  7. Granular computing • Multi-level, multi-view granular structures • Why do we need it? • Construct a set of granules with meaningful structures for learning effective rules

  8. A model for concept learning

  9. How do machines learn a single concept?

  10. A partition-based learning strategy

  11. A covering-based learning strategy

  12. Applications A dancing spider robot, University of Arizona Cancer diagnosis, University of Wisconsin http://pages.cs.wisc.edu/~olvi/uwmp/cancer.html http://hplusmagazine.com/2010/02/15/can-he-make-dancing-hexapod-robot-happy/

  13. Reference • X.F. Deng, Yao, Y.Y. (2012) An information-theoretic interpretation of thresholds in probabilistic rough sets, RSKT'12. • Yao, Y.Y., X.F. Deng. (2012). Granular Computing Paradigm for Concept Learning. In: Ramanna, S., Jain, L., Howlett, R.J. (Eds.), Emerging Paradigms in Machine Learning, Springer, London, pp. 307-326. • Ross, B. H., Spalding, T. L. (1994). Concepts and Categories. Academic Press, New York. • Yao, Y.Y. (2008). A unified framework of granular computing. In: Pedrycz W, Skowron A and reinovich V (eds.) Handbook of Granular Computing, pp. 401-410. Wiley, New York.

  14. Questions? Thank you Xiaofei Deng Department of Computer Science deng200x@cs.uregina.ca