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2013-05-23 12:21
求翻译：(1 − B)(1 − B)Zt = (1 − λ_1B) (1 − λ_2B)at and define a new time series Wt by (1 − B)Wt=(1 − λ_2B)at.Clearly,this newly defined series is an exponential smoothing process. That is, Wt follows an ARIMA(0,1,1) model. It is also easy to see that是什么意思？ 待解决
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(1 − B)(1 − B)Zt = (1 − λ_1B) (1 − λ_2B)at and define a new time series Wt by (1 − B)Wt=(1 − λ_2B)at.Clearly,this newly defined series is an exponential smoothing process. That is, Wt follows an ARIMA(0,1,1) model. It is also easy to see that
问题补充： |
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