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汉语拼音：wù chā

也叫绝对误差。一个量的准确值与它的近似值之间的差。绝对误差与近似值的比称为相对误差。误差的大小反映了实验、观察、测量和近似计算等所得结果的精确程度。

1. 犹差错。

   汉 荀悦 《汉纪·文帝纪下》：“上功幕府，误差六级，文吏以法绳之，陛下下之吏，削爵罚及之。” 唐 赵璘 《因话录·徵》：“谈话之误差尚可，若著于文字，其误甚矣。”

2. 数学上称测定的数值或其他近似值与真值的差为误差。

• Smoother is one of the widely used approaches to eliminate or to weaken the stochastic error from sampling data.

  平滑是消除或削弱测量数据随机误差时常用的数据处理手段。

• Simulation results show that the mean square error (MSE) of the proposed method is about one tenth of that of the LS method.

  计算机仿真结果表明：新算法的均方根误差（MSE）约为LS算法的十分之一。

• Psychological data is often obtained from subjective assessment, it has larger error compared with physical data.

  心理学的数据往往是通过主观评判得到的，和物理学的数据相比有较大的误差。

• To determine the reversal error, the loading cycle is to be absorbed up to the nominal force.

  为了确定反转误差，载重循环要能承受起标准力。

• Of those, 36 were chief executive s, business owners and top managers, it said. The poll did not include a margin of error.

  其中，总裁、企业主和高级经理的人数为36人。该调查没有计算误差幅度。

• The effects of scanner uncertainty, the aerosol backscatter and atmospheric temperature on wind accuracy of the wind lidar were evaluated.

  研究了扫描角度误差、气溶胶后向散射信号、大气温度对风场探测精度的影响。

• The viscosity resistance is a primary factor to fading errors when the acceleration of gravitation is measured on an air track.

  在气垫导轨上测重力加速度时，空气粘滞阻尼力是产生误差的主要原因。

• Experiment results indicate that this measure is of great help to constrain the zero error and increase precision of instruments.

  实验结果表明，该措施能够有效地抑制零点误差，提高仪器测量精度。

• In fact, astronomy cannot pinpoint such a "galactic alignment" to within a year, much less a day.

  事实上，天文学还不能在一年的误差内计算这一“银河连珠”事件发生的时间，更不用说精确到某一天了。