自动门
自动门:粗大误差
发布时间:2015/5/2
自动门讯:
粗大误差
粗大误差是指在一定的条件下测量结果显著地偏离其实际值时所对应的误差,简称粗差。从性质上来看,粗差并不是单独的类别,它本身既可能具有系统误差的性质,也可能具有随机误差的性质,只不过在一定测量条件下其绝对值特别大而已。
粗大误差产生原因是由于测量方法不妥当,各种随机因素的影响以及测量人员粗心(又称这类误差为疏失误差)所造成的。在测量及数据处理中,当发现某次测量结果所对应的误差特别大时,应认真判断该误差是否属于粗大误差。一般理论分析、增加测量次数或重新进行测量。改变测量条件或人员、利用统计学的方法等一系列办法,在相当程度上判断出该值是否属于粗差,如属粗差,该值应舍去不用。
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