在原位标定输入输出观测数据均含有噪声的情况下，应用传统的最小二乘法进行参数辨识将会得到有偏的结果。
If both of the input and output data in in-situ calibration contain have noises, the result will be a biased one when the traditional least squares method is used for parameter identification.
鸟神星的外观偏红色，光谱的观测指出其表面可能覆盖著甲烷冰。
Makemake is known to be a world somewhat red in appearance, with spectra indicating it is likely covered with frozen methane.
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