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

International Journal of Concrete Structures and Materials

Table 9 Influence of the various number of membership functions on PSO–DA ANFIS.

Number of membership function	MAPE	Efficiency	R²	RMSE
5	3.56	0.85	0.84	4.44
8	3.60	0.85	0.84	4.51
11	2.09	0.91	0.90	3.52
14	1.67	0.97	0.92	2.68
18	1.88	0.94	0.89	2.93

Bold numbers in the table are related to the maximum or minimum of the obtained results