From: Epidemiological analysis of varicella in Dalian from 2009 to 2019 and application of three kinds of model in prediction prevalence of varicella
Year
Actual value
GM (1,1)
Markov
GM (1,1)-Markov
2019
62.68
53.64
56.21
59.51
Relative error(%)
14.42
10.31
5.06