ＦｕｒｔｈｅｒＩｎｖｅｓｔｉｇａｔｉｏｎｆｏｒＮｏｎｌｉｎｅａｒＦｒｅｅＶｉｂｒａｔｉｏｎｏｆＥｌａｓｔｉｃＣｉｒｃｕｌａｒＰｌａｔｅｗｉｔｈＬａｒｇｅＡｍｐｌｉｔｕｄｅＧＡＩＢｉｎｇｚｈｅｎｇ；ＣＵＩＧｕａｎｇｙｕ（盖秉政，崔光育）（Ｄｅｐｔ．ｏｆ.........