本文从备件的需求预测入手，对备件在设备中的寿命分布进行统计分析，进而得到该型号备件在设备中的需求分布类型。
In this paper, we start at the demand prediction of spare parts, use statistical analysis to study the distribution of spare parts' life in equipments, and get the distribution of the demand further.
简要介绍了舰空导弹电子设备寿命服从指数分布的特点，根据备件的故障率可以有效地指导备件的存储策略，提出了一种基于历史数据的备件故障率计算方法。
According to the character that failure rates of spare parts have an effect on its storage, this paper introduces a calculating method for spares fault ratio based on historical data.
特别，针对储存寿命服从威布尔分布的系统，利用枢轴量，给出了前述备件数M的置信区间；
Based on this model, for the Weibull distribution, utilizing the pivotal quantity and Fiducial distribution, the confidence interval of the spare parts number M is constructed;
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