Journaling is the process of logging changes to the file system through a journal (which is a dedicated circular log on a contiguous region of the disk).

日志记录就是通过日记(磁盘上相邻区域的专门循环记录)记录文件系统的变更的过程。

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Non contact electromagnetic actuator was used in the active control system of transverse vibration of circular disk composed of analog circuits.

应用非接触式的电磁作动器，采用模拟器件设计了一整套圆盘横向振动的主动控制系统，并对圆盘进行了振动主动控制实验。

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