On-line unsupervised outlier detection using finite mixtures with discounting learning algorithms
Proceedings of the sixth ACM SIGKDD international conference on Knowledge discovery and data mining
Algorithms for Mining Distance-Based Outliers in Large Datasets
VLDB '98 Proceedings of the 24rd International Conference on Very Large Data Bases
Outlier Detection Using Replicator Neural Networks
DaWaK 2000 Proceedings of the 4th International Conference on Data Warehousing and Knowledge Discovery
Discovering cluster-based local outliers
Pattern Recognition Letters
A clustering-based method for unsupervised intrusion detections
Pattern Recognition Letters
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Outlier detection is important in many fields. The concept about outlier factor of object is extended to the case of cluster. Outlier factor of cluster measure the deviation degree of a cluster from the whole dataset and two outlier factor definitions are presented. A framework of clustering-based outlier detection, named FCBOD, is presented. The framework consists of two stages, the first stage cluster dataset and the second stage determine outlier cluster by outlier factor. The time complexity of FCBOD is nearly linear with respect to both size of dataset and number of attributes. The theoretic analysis and the experimental results show that the detection approach is effective and practicable.