A Crash Severity Prediction Method Based on Improved Neural Network and Factor Analysis

Table 2

Summary of training functions.

No.	Function name	Abbreviation
1	BFGS quasi-Newton backpropagation	BFGS
2	Conjugate gradient backpropagation with Powell-Beale restarts	CGB
3	Conjugate gradient backpropagation with Fletcher–Reeves updates	CGF
4	Conjugate gradient backpropagation with Polak–Ribiere updates	CGP
5	Gradient descent backpropagation	GD
6	Gradient descent with adaptive learning rate backpropagation	GDA
7	Gradient descent with momentum	GDM
8	Gradient descent w/momentum and adaptive learning rate backpropagation	GDX
9	One-step secant backpropagation	OSS
10	RPROP backpropagation	RP
11	Scaled conjugate gradient backpropagation	SCG
12	Levenberg–Marquardt backpropagation	LM
13	Bayesian regulation backpropagation	BR