[1]杨明,孙志挥,吉根林.一种基于分布式数据库的全局频繁项目集更新算法[J].东南大学学报(自然科学版),2002,32(6):879-883.[doi:10.3969/j.issn.1001-0505.2002.06.012]
　Yang Ming,Sun Zhihui,Ji Genlin.Algorithm based on distributed database for updating global frequent itemsets[J].Journal of Southeast University (Natural Science Edition),2002,32(6):879-883.[doi:10.3969/j.issn.1001-0505.2002.06.012]
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一种基于分布式数据库的全局频繁项目集更新算法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
32
期数:
2002年第6期
页码:
879-883
栏目:
计算机科学与工程
出版日期:
2002-11-20

文章信息/Info

Title:
Algorithm based on distributed database for updating global frequent itemsets
作者:
杨明1; 2;  孙志挥1;  吉根林1
1 东南大学计算机科学与工程系,南京 210096; 2 安徽机电学院计算机科学与工程系,芜湖 241000
Author(s):
Yang Ming1; 2;  Sun Zhihui1;  Ji Genlin1
1 Department of Computer Science and Engineering, Southeast University, Nanjing 210096,China
2 Department of Computer Science and Engineering, Anhui Institute of Mechanical and Electrical Engineering,Wuhu 241000,China
关键词:
数据挖掘;  分布式数据库;  全局频繁项目集;  频繁模式树;  更新
Keywords:
data mining;  distributed database;  global frequent itemsets;  frequent pattern tree(FP-tree);  updating
分类号:
TP311
DOI:
10.3969/j.issn.1001-0505.2002.06.012
摘要:
在算法FMAGF的基础上,提出了一种基于分布式数据库的全局频繁项目集更新算法——UAGFI,该算法主要考虑最小支持度发生变化时全局频繁项目集的更新情况. UAGFI在最坏的情况下仅须扫描各局部数据库一遍,并利用已挖掘的结果,可避免传送某些原全局频繁项目对应的条件频繁模式树,从而降低网络通讯代价.实验结果表明,UAGFI算法是有效可行的.
Abstract:
A new algorithm UAGFI(updating algorithm of global frequent itemsets based on distributed database)is introduced, it considers the updating of global frequent itemsets when dynamically adjusting minimum support measure threshold. In the worst case, UAGFI only scans every local transaction database once and can avoid transmitting some conditional pattern tree and/or base of original global frequent item by utilizing mined results. Therefore, UAGFI uses far less communication overhead and obviously improves updating efficiency of global frequent itemsets. Experimental results show that UAGFI algorithm is efficient and effective.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(79970092)、安徽省自然科学基金资助项目(03042205).
作者简介: 杨明(1964—),男,博士生,副教授; 孙志挥(联系人),男,教授,博士生导师,sunkitty@jlanline.com.
更新日期/Last Update: 2002-11-20