摘要
本文提出的最大标准差方法和最大变异系数方法,能充分利用以往数据和经验提供的信息,大大减少了试件个数。与国际上常用的单侧容限系数法相比,可节省大量试件;而在试件个数相同的情况下,则可得到更接近母体百分位值的置信下限(如安全寿命或安全疲劳极限等)。
It is easy to determine the supremum of the population standard deviation or coefficient of variation for the material to be tested, although to find the standard deviation or coefficient of variation is difficult by means of the information from data-base before the test beginning. On the basis of the fact, the methods of supremum of population standard deviation and coefficient of variation are presented for test design and statistical analysis of the result. The one-sided lower confidence limits of the population percentiles obtained by the methods are greater than those by the one-sided tolerance factor at a given confidence level.the number of specimens required fewer.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1991年第4期51-55,共5页
Journal of Beijing University of Aeronautics and Astronautics
关键词
标准差
疲劳试验
变异系数
supremum of standard deviation, supremum of coefficient of variation, population percentile, one-sided lower confidence limit.
