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2013-05-23 12:21
求翻译：Remark: In real applications, it is rare that one needs more than the second-order differencing 〖(1 - B)〗^2 to render a non-periodic time series stationary. Only in the velocity of a missile, I experienced the need of using 〖(1 - B)〗^3. Another case that higher-order difference might be necessary is to model the annual是什么意思？ 待解决
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Remark: In real applications, it is rare that one needs more than the second-order differencing 〖(1 - B)〗^2 to render a non-periodic time series stationary. Only in the velocity of a missile, I experienced the need of using 〖(1 - B)〗^3. Another case that higher-order difference might be necessary is to model the annual
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