Dynamic Evolution Analysis of Desertification Images Based on BP Neural Network

Table 1

Introduction to commonly used functions of BP neural network.

Function category	Function name	Features
Network creation function	Newcf	Create a multilayer feedforward network
	Newff	Create a feedforward network
Network initialization function	Initwb	Initialize the main structural parameters of the network
Transfer function	Logsig	S-type transfer function (logarithm)
	Tansig	S-type transfer function (tangent)
Learning function	Learngd	Gradient descent learning function
	Learngdm	Gradient descent (momentum learning) function
Training function	Traind	Training weight/threshold
	Adapt	Adaptive function
Simulation function	Sim	Neural network simulation
	Mse	Mean square error function