Efficiency and consistency study on Carma

Yuan Huang, Xing Wang, Ben Chang Shia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Carma is a type of online association algorithm, designed to facilitate association rule with online data flow and successively changing support thresholds. In this paper we study the factors that contribute to the efficiency of Carma and how data flow distribution give effects on the performance of Carma. We design several experiments with two kinds of data. In fixed support threshold situations, we compare Carma with that of Apriori. We find the sets generated by Carma are subsets of those generated by Apriori. We find that if the support threshold is reasonably defined, these two algorithms reach the same results. On the other hand, as the support threshold increases, Phase I generates less items and the number of deleted sets from Phase II first increases and then declines. Carma behaves consistently towards changing support. We notice the earlier the items enter into a lattice, the more accurate the estimations are. If base stone elements show up early in the transaction, the performance of Phase II is mainly influenced by the late-entered item sets. Based on the discussion with Carma, we propose a new procedure to improve Carma. Simulations reveal that the modified algorithm works well.

Original languageEnglish
Title of host publicationNCM 2009 - 5th International Joint Conference on INC, IMS, and IDC
Pages589-594
Number of pages6
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventNCM 2009 - 5th International Joint Conference on Int. Conf. on Networked Computing, Int. Conf. on Advanced Information Management and Service, and Int. Conf. on Digital Content, Multimedia Technology and its Applications - Seoul, Korea, Republic of
Duration: Aug 25 2009Aug 27 2009

Other

OtherNCM 2009 - 5th International Joint Conference on Int. Conf. on Networked Computing, Int. Conf. on Advanced Information Management and Service, and Int. Conf. on Digital Content, Multimedia Technology and its Applications
CountryKorea, Republic of
CitySeoul
Period8/25/098/27/09

Keywords

  • Apriori
  • Association rule algorithm
  • Carma

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Software

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    Huang, Y., Wang, X., & Shia, B. C. (2009). Efficiency and consistency study on Carma. In NCM 2009 - 5th International Joint Conference on INC, IMS, and IDC (pp. 589-594). [5331786] https://doi.org/10.1109/NCM.2009.241