The traditional product limit estimation method can only deal with complete data and right censored data, but can not deal with left truncated data.
传统的乘积限估计法只能处理寿终数据和右删失数据，对左截断数据则无能为力。
Aiming at the characteristics of small sampling in aeronautic-product project scheme, a new prediction method to acquire the time limit of working process was studied based on Grey System theory.
针对航空产品工程计划中工序作业时间小样本输入条件的特征，提出了一种基于灰色系统理论的工序作业时间预测方法。
Comparisons are made on the features of the life table Method and the Product-Limit Estimation in life table constructing procedure. A special type of life data, the truncated data, is introduced.
对生命表法和乘积限估计法应用上的特点进行了比较，同时还对特殊的寿命数据类型——截断数据做了简要介绍。
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