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Xudong Luo, Jeffrey Xu Yu, Zhi Li's Advanced Data Mining and Applications: 10th International PDF

By Xudong Luo, Jeffrey Xu Yu, Zhi Li

This e-book constitutes the court cases of the tenth foreign convention on complex information Mining and purposes, ADMA 2014, held in Guilin, China in the course of December 2014. The forty eight ordinary papers and 10 workshop papers offered during this quantity have been rigorously reviewed and chosen from ninety submissions. They care for the next subject matters: info mining, social community and social media, suggest structures, database, dimensionality aid, increase laptop studying recommendations, category, great info and functions, clustering equipment, computer studying, and information mining and database.

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Additional resources for Advanced Data Mining and Applications: 10th International Conference, ADMA 2014, Guilin, China, December 19-21, 2014. Proceedings

Sample text

For mushroom, retail, kosarak, chess, psumb and accidents, FHN was respectively up to 42 times faster, 18 times faster, 38 times faster, 500 times, 15 times and 25 times faster than HUINIV-Mine. In terms of memory usage, FHN uses much less memory than HUINIV-Mine. 97 GB while FHN was using only up to 250 MB. On kosarak, chess, psumb and accidents HUINIV-Mine ran out of memory under our 5 GB memory limit while FHN was respectively using 20 MB, 1179 MB, 100 MB and 350 MB for the lowest minutil values.

T4 ). External utilities of items a, c, and e in T2 are q(a, T2 ) = 2, q(c, T2 ) = 6 and q(e, T2 ) = 2. Fig. 1 (right) indicates that the external utility of a, b, e are respectively p(a) = 5, p(c) = 1 and p(e) = 3. Definition 1 (Utility of an itemset). The utility of an item i in a transaction Tc is denoted as u(i, Tc ) and defined as p(i) × q(i, Tc ). An itemset is a set of items. The utility of an itemset X in a transaction Tc is defined as u(X, Tc ) = i∈X u(i, Tc ). The set of transactions containing X is denoted as g(X).

The reason is that the algorithm can miss some HUIs if rutil values of negative items are included in utility lists as we have demonstrated in the last paragraph of Section 2. Third, the total order is defined such that all negative items succeed positive items (as previously explained). Fourth, the TWU pruning condition T W U ({x, y}) < minutil using the EUCS structure is only used for positive items. We now discuss the correctness of these modifications for finding all HUIs when positive and negative items are used.

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