该规律能全面描述机床双频颤振现象和颤振过程主频带移动的原因。
It can explain the double frequency chatter and the change of superior frequency in chattering process.
结果表明，改进后仪器接收到的地震反射波主振幅、主频率、频带宽度、垂向分辨率及仪器记录信号的有效动态范围均有不同程度的提高。
The results show that the main amplitude, main frequency and frequency band of reflected wavelet and the effective dynamic range of system have different degrees of increase.
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