[Retracted] Image Classification Model Based on Deep Learning in Internet of Things

Table 2

Training times of five activation functions on Food-101 and Places2.

Activation function	Time (h)
	Food-101	Places2
Sigmoid	2.6	3.5
Tan	2.3	3.2
ReLU	1.9	2.5
PReLU	2.1	2.9
TReLU	2.2	3.0