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A new clustering algorithm based on the connected region generation
( Liuwei Feng ),( Dongxia Chang ),( Yao Zhao ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.6
In this paper, a new clustering algorithm based on the connected region generation (CRG-clustering) is proposed. It is an effective and robust approach to clustering on the basis of the connectivity of the points and their neighbors. In the new algorithm, a connected region generating (CRG) algorithm is developed to obtain the connected regions and an isolated point set. Each connected region corresponds to a homogeneous cluster and this ensures the separability of an arbitrary data set theoretically. Then, a region expansion strategy and a consensus criterion are used to deal with the points in the isolated point set. Experimental results on the synthetic datasets and the real world datasets show that the proposed algorithm has high performance and is insensitive to noise.
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Information Systems Security Assessment Based on System Dynamics
Liu Wei,Cui Yong-feng,Li Ya 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.2
With the rapid development of information technology, information systems security becomes more and more important for both national economics and people’s everyday life. Therefore, in this paper, we study on the problem of information systems security assessment. However, existing traditional methods has two major issues. First, it is unclear that whether there remains severe potential risks unrecognized, and thus the reliability is limited. Second, the assessment results deviate from the real one due to the time and environmental restrictions, the subjective reasons of the researchers, or biased observed data, etc. To this end, we propose to leverage system dynamics (SD) for information systems security assessment. Specifically, based on the analysis of casual loops and positive and negative feedbacks among factors, we explore potential risks and capture those who are impossible to be measured using traditional methods.
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