对用贝塞尔公式评定不确定度的思考  

REFLECTION ON ASSESSMENT OF UNCERTAINTY BY BESSEL FORMULA

作　　者：贺水燕[1] 文盛乐[2] 蔡静[1] 吴伶锡[1] 

机构地区：[1]湖南科技大学,湘潭411201 [2]湖南师范大学,长沙410081

出　　处：《大学物理实验》2006年第1期63-67,共5页Physical Experiment of College

摘　　要：用实例证明了在测量次数小于10时,要得到与无限次测量相同的置信概率,则必须在前乘以因子t;对于少数物理实验书中没有提到测量次数与t因子的关系问题,忽视了贝塞尔公式成立的条件,这是错误的。It is demonstrated by examples that when the measurement is less than 10 times, the factor t must be multipied by in order to gain the same confidence probability as that when the measurement time is infinite. So, it is wrong in some books that the relation of t and measurement tlme,and the precondition of Bessel formula ate neglected.

关 键 词：不确定度 标准偏差 测量次数 置信因子 

分 类 号：O241.1[理学—计算数学]