数据精化 meaning in English

data purification
data refinement

The preprocessing of web usage mining mainly includes : data cleaning , user recognition , session identification , path supplementation and user transaction pattern recognition , etc . this paper designs a personalized information recommendation system based on data mining ( wpirs ) , and gives a recommendation strategy and algorithms respectively
Web访问挖掘预处理过程主要包括：数据精化、用户识别、访问操作识别、路径完善和用户事务模式识别等。进而本文设计了一个基于数据挖掘的个性化信息推荐系统( wpirs ) ，并给出了相应的推荐策略和推荐算法。