An Integration Method Of Classifiers For Abnormal Phone Detection Harassing and fraud calls have spread like viruses in peopleu0027s lives, many researchers have proposed some solutions to abnormal phone detection. However, most of these methods are passive detection, cannot give accurate prediction in time. In this work, we worked with operators to obtain a volume of real telecom user data and extract a series of comprehensive features. We propose an integration method of classifiers for abnormal phone detection by applying the machine learning algorithm on the data with unbalance and xe2x80x98dirty dataxe2x80x99. Especially, we use bootstrap sampling method and voting strategy to reduce the false prediction of classier due to noise data. The experimental result shows the effectiveness of our method in contrast with traditional classification algorithm.

An Effective Approach to Classify Abnormal Network Traffic Activities using Wavelet Transform Understanding network activities has become the most significant task in network security due to the rapid growth of the Internet and mobile devices usages. To protect our computing infrastructures and personal data from network intruders or attacks, identifying abnormal activities is critical. Extracting features from network traffic data is considered as an essential task to be performed because it affects the overall performances to identify the activities accurately. Although researchers proposed several approaches, they mainly focused on identifying the best possible technique to detect abnormal network activities. Only a few studies considered utilizing feature extraction techniques. In this paper, we introduced a new approach, with which an integrative information feature set is determined to identify abnormal network activities using wavelet transformation. Instead of extracting features by attributes, the approach uses all attributes information to extract features and to design a reliable learning model to detect abnormal activities by reducing false positives. Two machine learning techniques, Logistic Regression (LR) and Naive Bayes, are utilized to show the effectiveness of the approach. A visualization method is also used to emphasize our approach. As a result, we found that our proposed approach produces a better performance result with less computational time in detecting abnormal network activities.