<p>求助文章：Truong,&nbsp;Y.&nbsp;K.,&nbsp;and&nbsp;Stone,&nbsp;C.&nbsp;J.,&nbsp;1994.&nbsp;Semiparametric&nbsp;time&nbsp;series&nbsp;regression.</p><p>Journal&nbsp;Time&nbsp;Series&nbsp;Analysis&nbsp;15,&nbsp;405–428.</p><p>谢谢</p>