frequentan.弗列宽塔frequentadj.频繁的；经常的vt.常到；常去frequent patterns mining频繁模式挖掘Frequent multi-itemset高项频繁集frequent access patterns频繁访问模式frequent itemsets mining频繁集挖掘frequent a restaurant.常去的饭馆frequent for information刺探消息frequent Induced subtree频繁Induced子树frequent closed patterns频繁闭合模式frequent-flier program报偿老主顾计划, 老主顾优惠制度frequent-flyer program常客优待计划

1. The experiments show that FP-DFS had good efficiency in frequent item-set mining.
   实验表明，该算法对于频繁项集挖掘具有比较高的效率。
2. The problem of fuzzy constraint in frequent itemset mining is studied.
   摘要研究频繁项集挖掘中的模糊约束问题。