A relevant subspace based contextual outlier mining algorithm
A relevant subspace based contextual outlier mining algorithm
复制标题
一种基于相关子空间的上下文异常值挖掘算法
DOI:
10.1016/j.knosys.2016.01.013
复制
发表时间:
2016-05
影响因子:
8.8
通讯作者:
Qin Xiao
中科院分区:
文献类型:
--
作者:
Zhang Jifu;Yu Xiaolong;Li Yonghong;Zhang Sulan;Xun Yaling;Qin Xiao
For high-dimensional and massive data sets, a relevant subspace based contextual outlier detection algorithm is proposed. Firstly, the relevant subspace, which can effectively describe the local distribution of the various data sets, is redefined by using local sparseness of attribute dimensions. Secondly, a local outlier factor calculation formula in the relevant subspace is defined with probability density of local data sets, and the formula can effectively reflect the outlier degree of data object that does not obey the distribution of the local data set in the relevant subspace. Thirdly, attribute dimensions of constituting the relevant subspace and local outlier factor are defined as the contextual information, which can improve the interpretability and comprehensibility of outlier. Fourthly, the selection of N data objects with the greatest local outlier factor value is defined as contextual outliers. In the end, experimental results validate the effectiveness of the algorithm by using UCI data sets.
登录
查看更多内容
影响因子:
8.9
作者:
M. Bouguessa;Shengrui Wang
通讯作者:
M. Bouguessa;Shengrui Wang
DOI:
--
发表时间:
1998-08
期刊:
--
影响因子:
--
作者:
Edwin M. Knorr;R. Ng
通讯作者:
Edwin M. Knorr;R. Ng
DOI:
10.2307/2530985
发表时间:
1980-07
期刊:
--
影响因子:
--
作者:
V. Barnett;T. Lewis
通讯作者:
V. Barnett;T. Lewis
影响因子:
4.3
作者:
Liu, HC;Shah, S;Jiang, W
通讯作者:
Jiang, W
DOI:
10.1007/bfb0100984
发表时间:
1998-03
期刊:
--
影响因子:
--
作者:
Sunita Sarawagi;R. Agrawal;N. Megiddo
通讯作者:
Sunita Sarawagi;R. Agrawal;N. Megiddo