Robust Extreme Learning Machine Using New Activation and Loss Functions Based on M-Estimation for Regression and Classification

Table 2

The ρ(.), , and weight function , of M and redescending M- estimators.

Method	Weight-loss function	–functions; Proposed activation functions	Weight-function	C
Lm1stf				NA
ALARM				3
OLS				NA
Insha				1.5
Welsch				4.654
Tukey bisquare				2.985
GMtf				NA
Ali				2
Cauchy				3
Khalil et al.(2017				3
Logistic				1.205