威布尔分布
威布尔模量
可靠性(半导体)
配电装置
阿卡克信息准则
统计
故障率
数学
指数威布尔分布
均方误差
可靠性工程
分布(数学)
概率分布
工程类
物理
数学分析
功率(物理)
量子力学
作者
Fan Litian,Hu Zhi,Qingqing Ling,Hanwei Li,Hongliang Qi,Hongwen Chen
摘要
Abstract Inspired by the successful application of the q‐Weibull distribution in other research fields, we took the lead to use it in the field of medical devices in this work. The parameter estimation of the q‐Weibull distribution was performed using the probability plot method. The CT failure data from Nanfang Hospital in Guangzhou, China, were used to study the reliability of CT equipment at two levels: the CT system and its seven main components. In terms of evaluation accuracy, the mean squared error, Akaike's information criterion, and the determination coefficient were used to compare the accuracy of fitting of different distribution models. The results show that the accuracy of fitting the q‐Weibull distribution is higher than that of the Weibull distribution in terms of determination coefficient and mean squared error. When considering the complexity of the model, the fit accuracy of the Weibull distribution is better. The results were analyzed using reliability and failure rate plots. The q‐Weibull distribution gives a good fit for the failure data of the CT system and components. Though the Weibull distribution fits better in a few cases, the q‐Weibull distribution can describe the entire “bathtub curve” with only a set of parameters. The findings of this study can be extended to other medical devices.
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