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Table 1 Parameter setting.

From: A Hybrid Particle Swarm Optimization with Dragonfly for Adaptive ANFIS to Model the Corrosion Rate in Concrete Structures

Methods

Parameters

Values

GA, IGA

Mutation rate

0.33

Crossover rate

0.67

PSO, HPSO, PSODA

Inertia weight

2

Best global experience

2.2

Best personal experience

2.4

w-damp

0.98

Bat

Minimal and maximal values of the acoustic frequency (\([F_{\max } ,F_{\min } ]\))

[1,− 1]

Pulse intensity attenuation coefficient (\(\gamma\))

0.95

Pulse frequency increase factor (\(\delta\))

0.05

Maximum pulse frequency (\(R^{0}\))

0.75

Maximum pulse loudness (A)

0.25

BBO

Habitat modification probability

1

Immigration probability limits

[0,1]

Step size

1

Max immigration (I) and Max emigration (E)

1

Mutation probability

0.005