Forecast of Water Structure Based on GM (1, 1) of the Gray System

Table 4

The results of the inspection of the accuracy of the projection of the industrial water structure.

Corner	Residual spread mean ()	Residual variance ()	Original mean ()	Original value variance ()	Postcheck ratio ()	Small probability of error ( value)
	0	0.0018	1.1833	0.0078	0.4848	0.90
	0	0.0007	1944	0.0041	0.4213	0.90