Anomaly detection via adaptive greedy model
Anomaly detection via adaptive greedy model
复制标题
通过自适应贪婪模型进行异常检测
DOI:
10.1016/j.neucom.2018.09.080
复制
发表时间:
2019-02
期刊:
影响因子:
6
通讯作者:
Xiaowei Xu
中科院分区:
文献类型:
--
作者:
Dongdong Hou;Yang Cong;Gan Sun;Ji Liu;Xiaowei Xu
Anomaly detection is one of the fundamental problems within diverse research areas and application domains. In comparison with most sparse representation based anomaly detection methods adopting a relaxation term of sparsity via ℓ1norm, we propose an unsupervised anomaly detection method optimized via an adaptive greedy model based on ℓ0norm constraint, which is more accurate, robust and sparse in theory. Firstly for feature representation, a concise feature space is learned in an unsupervised way via stacked autoencoder network. We propose a dictionary selection model based on ℓ2, 0norm constraint to select an optimal small subset of the training data to construct a condense dictionary, which can improve accuracy and reduce computational burden simultaneously. Finally, each testing sample is reconstructed by ℓ0norm constraint based sparse representation, and anomalies are determined depending on the sparse reconstruction scores accordingly. For model optimization, an adaptive forward-backward greedy model is utilized to optimize this nonconvex problem with the theoretical guarantee. Our proposed method is evaluated with our real industrial dataset and benchmark datasets, and various experimental results demonstrate that our proposed method is comparable with conventional supervised methods and performs better than most comparative unsupervised methods.
登录
查看更多内容
影响因子:
6
作者:
Karami, Amin;Guerrero-Zapata, Manel
通讯作者:
Guerrero-Zapata, Manel
DOI:
10.1109/tpami.2012.277
发表时间:
2013-08-01
影响因子:
23.6
作者:
Shin, Hoo-Chang;Orton, Matthew R.;Leach, Martin O.
通讯作者:
Leach, Martin O.
DOI:
10.1109/tgrs.2014.2326654
发表时间:
2015-02-01
影响因子:
8.2
作者:
Yuan, Yuan;Wang, Qi;Zhu, Guokang
通讯作者:
Zhu, Guokang
影响因子:
35.6
作者:
Nadeem, Adnan;Howarth, Michael P.
通讯作者:
Howarth, Michael P.
影响因子:
10.6
作者:
Yang Cong;Ji Liu;Junsong Yuan;Jiebo Luo
通讯作者:
Yang Cong;Ji Liu;Junsong Yuan;Jiebo Luo