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An SLA-oriented Multiparty Trust Negotiation Model based on HCPN in Cloud Environment
Chunzhi Wang,Qiuxia Chen,Hongwei Chen,Hui Xu 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.7
The negotiation on Service Level Agreement (SLA) in current complex cloud environment often involves the multilateral negotiation. Therefore, this paper presents an SLA-oriented multiparty trust negotiation model based on Hierarchical Colored Petri Net (HCPN) in cloud environment. This model mainly provides trust negotiation of SLA parameters such as credibility, reliability, availability and service price so on for Cloud Service Providers (CSPs) and Cloud Service Consumers (CSCs), thus making complex process description of multiparty trust negotiation on SLA in cloud environment simple and efficient. On the basis of the HCPN model on SLA, this paper puts forward a multi-objective optimization algorithm for SLA trust negotiation. Simulation results show that the algorithm not only improves efficiency of multilateral negotiation, but also avoids QoS negotiation falling into local optimization.
Wang, Chao,Park, Jin Hyuk,Tan, Songwen,Cui, Chunzhi,Jin, Jing-Yi,Ahn, Dong June Hindawi Limited 2017 Journal of nanomaterials Vol.2017 No.-
<P>Polydiacetylenic complex films were prepared using 10,12-pentacosadiynoic acid (PCDA) and para-xylenediamine (<I>p</I>XDA) upon acid-base interactions. The thermochromatic reversibility of the complex films was modulated by changing the mixed molar ratio (3 : 1, 2 : 1, and 1 : 1) of the two molecules. The corresponding conformational changes of the complex films were studied by ex situ FTIR analysis upon thermal stimulation for the first time. In addition, the binding specificities of <I>α</I>-, <I>β</I>-, and <I>γ</I>-cyclodextrins (CDs) with the films were studied, where the <I>α</I>-CDs can induce stronger red fluorescent emission of the films. These fundamental results may be useful for platforms that use these polydiacetylenic complex films as optoelectronic devices or chemical/biological sensors.</P>
An Extension Approach for Threat Detection and Defense of Software-Defined Networking
Hui Xu,Chunzhi Wang,Hongwei Chen 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.2
Since the separation of the control plane and the data plane for Software-Defined Networking (SDN) leads to more and more security threats on the control plane and the SDN controllers, issues related to threat detection and defense of SDN must be seriously considered. This paper tries to introduce Extenics into the research on threat detection and defense of SDN and proposes an extension approach from a formal viewpoint. It first uses the matter-elements and the composite-elements to formally represent four security-related roles of SDN. It then utilizes the extension theory and basic-elements, by applying the dependent function to threat detection of SDN and making use of the affair-elements to formalize the NETCONF operations for threat defense of SDN. Finally, case study validates the feasibility of proposed extension approach in promoting the formalization of not only the security-related roles of SDN but also threat detection and defense of SDN.
Hui Xu,Chunzhi Wang,Hongwei Chen 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.5
Nowadays, Software-Defined Networking (SDN) is utilized to improve network management, but the management standardization of SDN itself is still under development. This paper focuses on the integration problem of management information models for SDN, and in order to understand the principles of unified information modeling for SDN management, it tries to apply the theory of concept lattices to learn concept hierarchy from the YANG language for SDN management. Thus, this paper first obtains formal contexts from YANG statements, and then studies formal concepts from the viewpoint of posets so as to learn concept hierarchy from YANG. Case study shows that, the proposed approach is feasible and promising to promote unified information modeling for SDN management.