1. Finding a proper mining granularity is a crucial task, which should be finished in the log data preprocess.
   文獻綜述在系統日志數劇的預解決中，確保恰當的開發粒級是項最重要任務。
2. In order to get the better useful information from the exam data, which with complex and uncertain data, it is necessary to preprocess the source data.
   為好些地從過多縝密的和不認定的參加考試數劇含有效地搶掘有用的的的信息，必要對源數劇對其進行預處置。