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arXiv 1004.3565cs.DB
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一种优化的动态内容加权关联规则挖掘方法

An Optimized Weighted Association Rule Mining On Dynamic Content

P. Velvadivu, K. Duraisamy

摘要:

关联规则挖掘的目的是从大型事务数据库中挖掘关联规则。经典的关联规则挖掘模型假设所有项目具有相同的重要性,而不考虑它们的权重。它也忽略了事务之间的差异和每个项集的重要性。但是,加权关联规则挖掘(WARM)不适用于只有二进制属性的数据库。它利用了每个项集和事务的重要性。WARM要求每个项目都被赋予权重,以反映它们对用户的重要性。权重可以对应于某些产品的特别促销或不同项目的盈利能力。本研究工作首先集中在基于有向图的权重分配,其中节点表示项目,链接表示关联规则。HITS的广义版本应用于图中的项目排名,其中所有节点和链接都允许有权重。然后,本研究通过开发一种在线特征向量计算方法来使用增强的HITS算法,该方法可以在频繁更新的情况下计算相互强化投票的结果。例如,在股票市场上,股票价格可能下跌或上涨。因此,我们需要仔细观察市场,我们的关联规则挖掘必须产生发生频繁变化的项目。这些都是通过估计扰动的上界和推迟更新尽可能。接下来我们证明了在动态数据的情况下,改进的算法比原来的HITS算法更有效。

英文摘要:

Association rule mining aims to explore large transaction databases for association rules. Classical Association Rule Mining (ARM) model assumes that all items have the same significance without taking their weight into account. It also ignores the difference between the transactions and importance of each and every itemsets. But, the Weighted Association Rule Mining (WARM) does not work on databases with only binary attributes. It makes use of the importance of each itemset and transaction. WARM requires each item to be given weight to reflect their importance to the user. The weights may correspond to special promotions on some products, or the profitability of different items. This research work first focused on a weight assignment based on a directed graph where nodes denote items and links represent association rules. A generalized version of HITS is applied to the graph to rank the items, where all nodes and links are allowed to have weights. This research then uses enhanced HITS algorithm by developing an online eigenvector calculation method that can compute the results of mutual reinforcement voting in case of frequent updates. For Example in Share Market Shares price may go down or up. So we need to carefully watch the market and our association rule mining has to produce the items that have undergone frequent changes. These are done by estimating the upper bound of perturbation and postponing of the updates whenever possible. Next we prove that enhanced algorithm is more efficient than the original HITS under the context of dynamic data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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