中文说明：
能够运用最小二乘发计算频谱，可以精确估算频谱
English Description：
Be able to calculate the spectrum by using the least square method, and accurately estimate the spectrum < br / >
Spectrum calculation by least square method and accurate estimation of spectrum
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中文说明：
能够运用最小二乘发计算频谱，可以精确估算频谱
English Description：
Be able to calculate the spectrum by using the least square method, and accurately estimate the spectrum < br / >