Highly Interpretable Linguistic Knowledge Bases Optimization: Genetic Tuning versus Solis-Wetts. Looking for a good interpretability-accuracy trade-off

Alonso, José María; Cordon, O.; Guillaume, S.; Magdalena, L.
Year: 2007
Type of Publication: In Proceedings
Book title: 2007 IEEE International Fuzzy Systems Conference
Pages: 901-906
ISBN: 1-4244-1210-2
ISSN: 1098-7584
DOI: 10.1109/FUZZY.2007.4295485
This work shows how to achieve a good interpretability-accuracy trade-off through keeping the strong fuzzy partition property along the whole fuzzy modeling process. First, a small compact knowledge base is built. It is highly interpretable and reasonably accurate. Second, an optimization procedure, which only affects the fuzzy partitions defining the system variables, is carried out. It improves the system accuracy while preserving the system interpretability. Two optimization strategies are compared: Solis-Wetts, a local search based strategy; and Genetic Tuning, a global search based strategy. Results obtained in a well-known benchmark medical classification problem, related to breast cancer diagnosis, show that our methodology is able to achieve knowledge bases with high interpretability and accuracy comparable to that obtained by other methodologies.
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