Structural Analysis and Total Coal Demand Forecast in China

Table 1

Classification and summary of ETS models.

Trend component	Seasonal component
	N (none)	A (additive)	M (multiplicative)
N (none)	N, N	N, A	N, M
A (additive)	A, N	A, A	A, M
Ad (additive damped)	Ad, N	Ad, A	Ad, M
M (multiplicative)	M, N	M, A	M, M
Md (multiplicative damped)	Md, N	Md, A	Md, M