A New Hybrid Model FPA-SVM Considering Cointegration for Particular Matter Concentration Forecasting: A Case Study of Kunming and Yuxi, China

Table 3

The unrestricted cointegration rank test on four time series.

	Hypothesized number of CE(s)	Eigenvalue	Trace statistic	0.05 critical value	Prob.
Unrestricted cointegration rank test (trace)	None	0.11	216.72	47.86	0.00
	At most 1	0.11	144.37	29.80	0.00
	At most 2	0.07	76.86	15.49	0.00
	At most 3	0.06	35.31	3.84	0.00
Unrestricted cointegration rank test (maximum eigenvalue)	None	0.11	72.34	27.58	0.00
	At most 1	0.11	67.51	21.13	0.00
	At most 2	0.07	41.55	14.26	0.00
	At most 3	0.06	35.31	3.84	0.00