Research on Freight Development of Guangdong Province Based on Grey Theory Model

Table 1

Grade reference table of grey system model parameters.

Accuracy class	Relative residuals ()	Mean variance ratio (C)	Probability of small error (P)	Correlation degree ()
Good	0.01	0.35	0.95	0.90
Qualification	0.05	0.45	0.85	0.80
Barely qualified	0.1	0.50	0.70	0.70
Disqualification	0.2	0.65	0.70	0.60