考虑随机截尾试验中有些试验产品无故障数据出现，提出采用平均秩次法计算经验分布函数。

Because some products show no failure in the random truncation test period, this paper USES the mean rank order method to calculate the empirical cumulative distribution function.

youdao

试验证明径向高斯核函数时频分布在故障诊断中有较强的特征提取作用。

The experiments are presented to show the RGK TFD has superior character extracting ability than the traditional fixed kernel TFD that is often used in fault diagnosis.

youdao