The periodical motion of aircraft rotating structures will cause a periodically modulated radar return signal.
飞机旋转部件的周期运动会对雷达信号的回波产生一个周期性的调制。
Within the supercritical speed range, the response of the rotor is periodical motion with the increase of amplitude.
在临界转速区，系统响应为周期运动，振幅相应增大。
The paper introduces the motion module of CNKI china periodical internet. It analysizes the structure and function of china periodical internet's. knowledge information management system.
文章介绍了CNKI中国期刊网的运行模式，分析了中国期刊网知识信息管理系统的组成与功能。
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