Hongfeng Sun

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To meet some application's requirement, we introduce a new data type, ITS (Interval Time Series), which is modified based on the widely studied date type-time series, along with a dimension reduction technique to it. The implied idea of our method is derived from the orthogonal transformation. We then present an optimization to it, with which our method can(More)
Anomaly detection is always a challenge for wireless sensor network (WSN). In some applications, researchers compare the number of abnormal nodes with the pre-provided threshold to detect the anomaly. But, it involves the whole abnormal nodes in WSN and consumes lots of resources. In this paper, we proposed a probability-based algorithm for anomaly(More)
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