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- 加有高斯白噪声的两个正弦信号的的观测数据,分别用最小二乘法和总体最小二乘法估计其功率谱,并对两种方法的谱分析进行了比较-Plus a Gaussian white noise of the two sinusoidal signals of observational data, were used least squares and total least squares method to estimate the power spectrum, and spectral analysis