data purging

基本解释

Updating data, such as purging old data or updating values based on conditions
更新数据，比如清洁旧数据库或基于条件更新值。
The filtering rules should also include automatic purging or backup of aged data and a mechanism to expire large XML files sooner.
筛选规则还应该包括对旧数据的自动清除或者备份、以及使大的 XML 文件不久后过期的机制。
Expressions for purging composition data and row vectors of inverse of modal matrix, which are helpful in simplifying calculation, are developed.
本文提供了在运用特征向量法过程中对组成数据进行清洗的方法和有助于简化计算的模态矩阵之逆矩阵的行向量表达式。