Title Fault Diagnosis Method of Gearbox Multifeature Fusion Based on Quadratic Filter and QPSO-KELM

<div>Flow chart of QPSO-KELM. QPSO is used to search global optimal parameters of KELM.</div>

Mathematical Problems in Engineering

Figure 4: Title Fault Diagnosis Method of Gearbox Multifeature Fusion Based on Quadratic Filter and QPSO-KELM 