其次，研究了离散数据的预处理技术。

Secondly, study the pretreatment technology of the dispersed data.

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因此，逆向工程中的一个重要环节就是三坐标测量数据的预处理。

So, pre-handling of the CMM data is one of the most important steps in reverse engineering.

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本文采用预处理最新研究成果的高效算法实现了日志数据的预处理。

This paper realizes the web log data pre-process using the highly effective algorithm of the newest pre-process research results.

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