A method of measuring small vibration with an amplitude lower than half that of the wavelength of laser is developed.
研究振动幅度小于激光半波长的微小振动的测量方法。
The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. F. frequency.
调幅讯号之频谱为一半强度基频讯号之频谱分别正负位移一射频或载波之频率。
The results show that only fundamental dark soliton has a frequency jitter half that of bright soliton, and small-amplitude dark soliton has a frequency jitter stronger than that of bright soliton.
结果表明，只有基本暗孤子的频率抖动量（均方值）是亮孤子的一半，而其它小振幅暗孤子的频率抖动量大于亮孤子的频率抖动量。
The ultrasonic transducer vibrates longitudinally, its front cover plate links up with a half wavelength circular conical horn to increase the amplitude of the output end of the ultrasonic transducer.
该超声换能器采用纵向振动方式，其前盖板连接了一个半波长圆锥形变幅杆，以增大超声换能器输出端的振幅。
The authors show that using the half-wave strip method to deduce the bright and dark fringe conditions of Fraunhofer grating diffraction is simpler than the amplitude vector method.
本文用半波带法对夫琅禾费光栅衍射进行分析该方法和常用的振幅矢量法相比，分析衍射条纹的位置更要快捷，明了。
To obtain the same effect of using one phase modulator, the amplitude of the drivers on the two phase modulators can decrease to half of that in one phase modulator scheme.
两个相位调制器的驱动信号幅度可减小一半，便可获得和用一个相位调制器方案相同的调制效果。
The later half-day peak time variations of water level characterize anomalously with large earthquakes, whereas the amplitude shows less anomalous significance;
水位后半日波峰时变化对大震有异常反映，波幅异常意义较小；
The analysis results also indicate rub-impact faults induced by oil-film instability can produce some low-frequency components with small amplitude and oil whip can produce half frequency component;
油膜失稳引起的转定子碰摩故障，会产生一些低频成分，油膜振荡会产生半频成分；
The analysis results also indicate rub-impact faults induced by oil-film instability can produce some low-frequency components with small amplitude and oil whip can produce half frequency component;
油膜失稳引起的转定子碰摩故障，会产生一些低频成分，油膜振荡会产生半频成分；
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