Based on the engineering practice, the composition, function and design of baseband equipment are explained detailedly, a method for measuring the time delay and frequency is introduced.

结合工程实践，从综合基带的设备组成、功能、设计上进行了详细阐述，并介绍了一种时延测量和频率测量的方法。

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Then proposes a method to detect the arrival time of instantaneous signal and the frequency composition under strong noise background.

提出了在强噪声背景下检测瞬时信号的到达时间和频率成分的方法。

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The temperature spectra and frequency spectra of the damping capacity in the IM and RS/PM Al-Li alloys with the same composition were measured by the resonance method with the plate specimens.

采用板片状试样的共振法，测定了同一成分的铸锭合金（IM）和快速凝固粉末冶金（RS／PM）铝锂合金的阻尼温度谱和频率谱。

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