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摘要： 提出了双阈值用户事务算法。根据用户所访问的页面数来判断该用户是否为偶然用户，利用网络的拓扑结构和网页最低兴趣度来衡量一个网页是否为用户感兴趣的页面。改进了数据预处理过程，删除了偶然用户引起的访问记录，以及链接页面和用户不感兴趣的页面，生成一种有效的访问页面序列，即双阈值用户事务。通过事例对算法的有效性进行了论证。
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