At the same time the role of demand for different users to take the role of licensing mechanism, extract relevant statistical analysis report.
同时针对不同用户的角色需求，采取角色授权机制，提取相关的统计分析报表。
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.
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。
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