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Malicious domain detection based on multiple-dimensional features
ZHANG Yang, LIU Tingwen, SHA Hongzhou, SHI Jinqiao
Journal of Computer Applications 2016, 36 (
4
): 941-944. DOI:
10.11772/j.issn.1001-9081.2016.04.0941
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768
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Domain Name System (DNS) provides domain name resolution service, i.e., converting domain names to IP addresses. Malicious domain detection is mainly for discovering illegal activities and ensuring the normal operation of the domain name servers. Prior work on malicious domain name detection was summarized, and a new machine learning based malicious domain detection algorithm for exploiting multiple-dimensional features was further proposed. With respect to domain name lexical features, more fine-grained features were extracted, such as the conversion frequency of the numbers and letters and the maximum length of continuous letters. As for the network attribute features, more attentions were paid to the name servers, such as the quantity, and the degree of dispersion. The experimental results show that the accuracy, recall rate,
F
1 value of the proposed method reaches 99.8%, which means a better performance on malicious domain name detection.
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Personal relation extraction based on text headline
YAN Yang, ZHAO Jiapeng, LI Quangang, ZHANG Yang, LIU Tingwen, SHI Jinqiao
Journal of Computer Applications 2016, 36 (
3
): 726-730. DOI:
10.11772/j.issn.1001-9081.2016.03.726
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In order to overcome the non-person entity's interference, the difficulties in selection of feature words and muti-person influence on target personal relation extraction, this paper proposed person judgment based on decision tree, relation feature word generation based on minimum set cover and statistical approach based on three-layer sentence pattern rules. In the first step, 18 features were extracted from attribute files of China Conference on Machine Learning (CCML) competition 2015, C4.5 decision was used as the classifier, then 98.2% of recall rate and 92.6% of precision rate were acquired. The results of this step were used as the next step's input. Next, the algorithm based on minimum set cover was used. The feature word set covers all the personal relations as the scale of feature word set is maintained at a proper level, which is used to identify the relation type in text headline. In the last step, a method based on statistics of three-layer sentence pattern rules was used to filter small proportion rules and specify the sentence pattern rules based on positive and negative proportions to judge whether the personal relation is correct or not. The experimental result shows the approach acquires 82.9% in recall rate and 74.4% in precision rate and 78.4% in F1-measure, so the proposed method can be applied to personal relation extraction from text headlines, which helps to construct personal relation knowledge graph.
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