[Retracted] A Dynamic Econometric Analysis of Urbanization and Ecological Environment in Silk Road Economic Belt

Table 3

BP network prediction results.

	Lanzhou	Jiayuguan	Jinchang
Sample value	0.57	0.50	0.46
Predicted value	0.56	0.49	0.45
Relative error (%)	3.31	1.45	1.69