The main parameters that effect horizontal resolution of migration imaging were identified as medium velocity, dominant frequency of seismic wavelet and aperture Angle of migration processing.
结果表明，影响偏移成像水平分辨率的主要参数是介质速度、地震子波主频和偏移处理的孔径角。
The vibrating signals collected from pump bearings by a velocity sensor were analyzed with short time Fourier transform(STFT), wavelet transform(WT) and wavelet packet transform(WPT) in the paper.
对磁电式速度传感器采集的水泵轴承振动信号分别进行了短时傅立叶变换、小波变换、小波包变换。
The effect of superficial gas velocity and static water height on the wavelet power spectrum is dis- cussed and the vibration mechanism of the tube is analyzed.
采用防水型加速度计，在不同工况下测定洗涤冷却管的振动信号，并用小波变换分析信号；讨论了表观气速和静态液位对小波功率谱的影响，分析了冷却管振动的原因。
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