科学家们谨慎地监测那些观测，以排除观测误差和其它影响，诸如城市的热岛效应和由于地表变化导致的局部升温。
Scientists have carefully checked these observations to exclude observational errors and other influences - such as the urban heat island effect and localised warming due to land surface changes.
提出了用于得到最优加权系数的局部滤波误差方差和协方差计算公式。
The formula of computing variance and covariance among local filtering errors is presented, which is applied to obtain the optimal weighting coefficients.
计算机数控能动盘光学加工技术具有高加工效率和抑制中高频能力，而小磨头光学加工技术则有很强的局部误差修正能力。
The active-lap is able to remove the middle and high frequency errors by smoothing, and the small tool is adapt for removal of the local error.
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