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DESIGN OF EXPERIMENTS IN NEURO-FUZZY SYSTEMS

CLEBER ZANCHETTIN

Federal University of Pernambuco, Center for Informatics, Cidade Universitária, Recife — PE, 50.732-970, Brazil

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LEANDRO L. MINKU

University of Birmingham, School of Computer Science, Birmingham B15 2TT, United Kingdom

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TERESA B. LUDERMIR

Federal University of Pernambuco, Center for Informatics, Cidade Universitária, Recife — PE, 50.732-970, Brazil

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https://doi.org/10.1142/S1469026810002823Cited by:12 (Source: Crossref)

Abstract

Interest in hybrid methods that combine artificial neural networks and fuzzy inference systems has grown in recent years. These systems are robust solutions that search for representations of domain knowledge, reasoning on uncertainty, automatic learning and adaptation. However, the design and definition of the parameter effectiveness of such systems is still a hard task. In the present work, we perform a statistical analysis to verify interactions and interrelations between parameters in the design of neuro-fuzzy systems. The analysis is carried out using a powerful statistical tool, namely, Design of Experiments (DOE), in two neuro-fuzzy models — Adaptive Neuro Fuzzy Inference System (ANFIS) and Evolving Fuzzy Neural Networks (EFuNN). The results show that, for ANFIS, input MFs number and output MFs shape are usually the factors with the largest influence on the system's RMSE. For EFFuNN, the MF shape and the interaction between MF shape and number usually have the largest effect size.

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