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New Challenges in Learning Classifier Systems: Mining Rarities and Evolving Fuzzy Rules
The document discusses new challenges in learning classifier systems (LCS) when dealing with domains containing rare classes. It proposes using a design decomposition approach to analyze how LCS address rare classes. Specifically, it examines how the extended classifier system (XCS) handles rare classes. It identifies five critical elements of LCS that are important for detecting small niches associated with rare classes: 1) estimating classifier parameters correctly, 2) providing representatives of rare niches during initialization, 3) generating and growing representatives of rare niches, 4) adjusting the genetic algorithm application rate, and 5) ensuring representatives of rare niches dominate their niches. The document focuses on analyzing the first element of estimating classifier parameters for XCS when dealing with domains
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