A Grey NGM(1,1,𝑘) Self-Memory Coupling Prediction Model for Energy Consumption Prediction

Table 1

Test list of posterior variance ratio and small error probability.

Modeling accuracy class	Test index
	Posterior variance ratio 𝐶	Small error probability 𝑝
1st level (superior)	≤0.35	≥0.95
2nd level (qualified)	0.35~0.50	0.80~0.95
3rd level (marginal)	0.50~0.65	0.70~0.80
4th level (disqualified)	≥0.65	≤0.70