Based on the analysis of spectrum of pulsed wave, the sampling frequency is selected according to the performance of hardware.
在对方波频谱进行数学分析的基础上，结合硬件条件选择恢复波形的采样频率。
For example, trained observers obtain a very large amount of information about a star mainly from the accurate analysis of the simple lines that appear in a spectrum.
例如，经过训练的观察者主要通过对光谱中出现的简单线条的精确分析来获取关于恒星的大量信息。
The detailed structure of spectrum of atmospheric tides is obtained by the spectral analysis-and harmonic analysis from the microbarograph records.
根据微气压计记录采用频谱分析和调和分析两种方法得出了大气潮谱的详细结构。
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