基于CPS应用环境下信任网络的构建与研究

发布时间：2018-05-01 16:32

  本文选题：信息物理融合系统 + 信任网络　； 参考：《昆明理工大学》2016年硕士论文

【摘要】：随着信息技术的研究和互联网产业的快速发展,直接推动了信息物理融合系统(Cyber-physical systems, CPS)的开展与应用。CPS依托云计算、大数据、通信网络、嵌入式等多领域技术,实现了物与物之间的高度融合与集成,其中信任关系作为网络环境中非常重要的影响因素是值得关注和研究的。CPS作为互联网的一种延伸,网络环境既有相同也有不同之处。目前大部分信任模型主要研究范围是在互联网环境下,基于CPS应用环境下的信任模型很少涉及,本文将基于CPS应用环境下对信任网络进行研究。本文首先研究了互联网下集中式和分布式两大现有的主要的信任网络模型,分析了两种信任模型的特点和应用场景,结合CPS的具体环境,构建了CPS下中心控制型,链路相关型和中心相关型3种信任网络模型。中心控制型信任网络模型的应用场景主要是在信任机构进行主导评价的环境中。在信任评价过程中结合CPS环境提出了基于SERVQUAL模型的信任评估考量因素,考虑了评价数据的客观性和主观性的差异,引入了D-S融合理论消弱主观因素对信任评价结果的影响,最后对主观评价结果和客观评价结果进行加权处理给出最后的信任评价值,并通过实例验证了方法的可行性。链路相关型信任网络模型的应用场景主要是在网络中节点与节点之间已存在相当数量的信任评价关系的环境中,需求节点和目标节点可以通过其它节点来形成两个节点之间的信任价值链。本文在对信任关系的研究基础上给出了信任价值链的优化规则,通过优化计算最终得到需求节点和目标节点信任评估值,并通过实例验证了方法的可行性。中心相关型信任网络模型的应用场景主要是已有不同节点对中心节点有过评价历史数据,新的引入节点通过评价历史数据确定对中心节点的信任评价值。本文以具体应用环境为例,对信任过程进行优化计算,并通过实例验证了方法的优越性。
[Abstract]:With the research of information technology and the rapid development of Internet industry, the development and application of Cyber-physical systems (CPS), a physical information fusion system, rely on cloud computing, big data, communication network, embedded and other multi-domain technologies. The integration of objects and objects is realized, and the trust relationship is an extension of the Internet, which is a very important influence factor in the network environment. The network environment has some similarities and differences. At present, most of the trust models are mainly studied in the Internet environment, but the trust model based on CPS application environment is rarely involved. This paper will study the trust network based on CPS application environment. In this paper, the two main trust network models under the Internet, centralized and distributed, are studied, and the characteristics and application scenarios of the two trust models are analyzed. Combined with the specific environment of CPS, the central control model under CPS is constructed. There are three kinds of trust network models: link correlation and central correlation. The application scenario of the central control trust network model is mainly in the environment of trust organization leading evaluation. In the process of trust evaluation, considering the difference of objectivity and subjectivity of evaluation data, considering the factors of trust evaluation based on SERVQUAL model, combining with CPS environment, the D-S fusion theory is introduced to weaken the influence of subjective factors on the results of trust evaluation. Finally, the final trust evaluation value is given by weighting the subjective evaluation results and the objective evaluation results, and the feasibility of the method is verified by an example. The application scenario of the link-dependent trust network model is mainly in the environment where there are a number of trust evaluation relationships between nodes in the network. The requirement node and the target node can form the trust value chain between the two nodes through other nodes. Based on the research of trust relationship, this paper gives the optimization rules of trust value chain, and finally obtains the trust evaluation value of requirement node and target node by optimizing calculation. Finally, the feasibility of the method is verified by an example. The application scenario of the center-dependent trust network model is that different nodes have evaluated the historical data of the central node, and the new introduction node determines the trust evaluation value of the central node by evaluating the historical data. This paper takes the concrete application environment as an example, carries on the optimization computation to the trust process, and verifies the superiority of the method through the example.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP393.4;TP202
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本文编号：1830213