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2013-05-23 12:21
求翻译：(1 − B)(Zt− µ) = (1 − B)Zt−(1 − B)µ = (1 − B)Zt,the mean value vanishes after the first difference.Thus, from the differenced series △Zt, no information on the mean level of Zt is available.△Zt is the increment process of Zt.The second differenced series △2Zt is defined by是什么意思？ 待解决
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(1 − B)(Zt− µ) = (1 − B)Zt−(1 − B)µ = (1 − B)Zt,the mean value vanishes after the first difference.Thus, from the differenced series △Zt, no information on the mean level of Zt is available.△Zt is the increment process of Zt.The second differenced series △2Zt is defined by
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