对数正态分布
统计
数学
标准差
最大似然
分布(数学)
应用数学
数学分析
作者
Jianping Zhang,Fang Liu,Yu Liu,Helen Wu,Wen‐Li Wu,Aixi Zhou
标识
DOI:10.1109/ted.2012.2215864
摘要
In this paper, accelerated life tests of white organic light-emitting diodes (WOLEDs) are conducted to obtain failure data at normal operation conditions. The lognormal distribution function was applied to describe WOLED life distribution. Log mean and log standard deviation were determined by maximum likelihood estimation. The Kolmogorov-Smirnov test was performed, and the results further confirmed that WOLED life met the lognormal distribution. Numerical results indicated that WOLED life followed the lognormal distribution. It was also found that the acceleration model was consistent with inverse power law.
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