The Statistics and Analysis for Fast Radio Fine Structures Observed with the 0.7-1.5 GHz Spectrograph in Yunnan Observatory

After analyzing 158 radio bursts observed from September 2000 to September 2001 with the 0.7-1.5GHz spectrometer in Yunnan Observatory, we have found that there were fast fine structures (FFS) in 65% of the observed bursts.These fine structures are classified into four classes:millisecond spikes,type Ⅲ bursts,quasi-periodic pulsations,slowly drifting structures.Six typical and representative events of the FFSs and the interpretation of them are presented in this paper.