Temporal Knowledge Discovery with Infrequent Episodes


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    • Author:  by Dan Li  Liying Jiang  Jitender S. Deogun  

    • Abstract:  In this paper, we present an efficient algorithm which discovers rare episodes with a combination of bottomup and top-down scanning schema. The information sharing between bottom-up and top-down scannings helps prune candidate episodes, and thus, efficiently find infrequent episodes that are interesting to user. We evaluate the performance of the algorithm using real-life weather databases. We observe from experimental results that our approach results in 30%-90 % reduction in computation time and 25%-75 % reduction in the number of candidates comparing with Apriori algorithm. 1

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