Feature Extraction and Selection Scheme for Intelligent Engine Fault Diagnosis Based on 2DNMF, Mutual Information, and NSGA-II

Figure 11

Distributions of the solutions at different generations over the objective plane utilizing the NSGA-II based on the original feature subset : (a) 10 generations; (b) 20 generations; (c) 40 generations; (d) 60 generations.

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(b)

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(d)