Abstract:
In the past decade, frequent-regular itemset mining FRIM has been proposed
and applied in a wide range of applications. It aims to discover interesting sets of items
frequently and regularly occurring in a static database. However, in real-world
applications, the occurrence behavior of items/itemsets may change whenever the
database is updated and there may bethe situation of overwhelming or none of results
generated if the user set inappropriate support threshold. Thus, we here introduce a
new approach to mine top-k frequent-regular itemsets from incremental transactional
database for mining results which allows users to control the number of results. In this
approach, a set of k itemsets having highest frequency of occurrence and regularity
occurring in a incremental database is generated.
To mine such itemsets, an efficient single-pass algorithm called IMTFRI
(Incremental Miner of Top-k Frequent-Regular Itemset) is proposed. The partitioned
dynamic bit-vector is utilized to maintain occurrence information of each item/itemsets
while mining. In addition, to avoid mining on each incremental database from scratch,
the mining with baseline frequency setting technique is designed. Last, experimental
studies have been conducted to investigate efficiency of IMTFRI algorithm in the terms
of computational time and memory usage.