A Dynamic Reputation–based Consensus Mechanism for Blockchain

In recent years, Blockchain is gaining prominence as a hot topic in academic research. However, the consensus mechanism of blockchain has been criticized in terms of energy consumption and performance. Although Proof-of-Authority (PoA) consensus mechanism, as a lightweight consensus mechanism, is more efficient than traditional Proof-of-Work (PoW) and Proof-of-Stake (PoS), it suffers from the problem of centralization. To this end, on account of analyzing the shortcomings of existing consensus mechanisms, this paper proposes a dynamic reputation-based consensus mechanism for blockchain. This scheme allows nodes with reputation value higher than a threshold apply to become a monitoring node, which can monitor the behavior of validators in case that validators with excessive power cause harm to the blockchain network. At the same time, the reputation evaluation algorithm is also introduced to select nodes with high reputation to become validators in the network, thus increasing the cost of malicious behavior. In each consensus cycle, validators and monitoring nodes are dynamically updated according to the reputation value. Through security analysis, it is demonstrated that the scheme can resist the attacks of malicious nodes in the blockchain network. By simulation experiments and analysis of the scheme, the result verifies that the mechanism can effectively improve the fault tolerance of the consensus mechanism, reduce the time of consensus to guarantee the security of the system.     

How to understand “salable fake goods” and “unsalable quality goods”? An insight from the view of quality responsibility and consumers’ brand loyalty

A body of theoretical and practical research suggests technology innovation is the driving force for enterprise survival and development and that maintaining business ethics is an important guarantee in sustaining these enterprises developments. Fulfilling the “hard responsibility” of product quality based on technical standards and the “soft responsibility” of product quality based on business ethics is an important principle stimulating the benign interaction and continuous progress of technological innovation and business ethics, and realizing a balanced development of enterprises and society, which could promote positive brand and enterprise image to both stakeholders and consumers, helping consumers choose high-quality products in the market and social competition. However, the strange marketing phenomena of “salable fake goods” and “unsalable quality goods” shows that no systematic marketing strategies have been identified to date, that enterprises could adopt to effectively promote the recognition of consumers and turn them into a loyal customer group and have a stable market share. Based on customer buying behavior theory, cognitive consistency theory, signal theory, and social identity theory, this study explored the influencing mechanism of quality responsibility on brand loyalty of consumers and the mediating role of corporate reputation and brand identification, using 224 valid questionnaires from 16 communities (residents) in Shanxi and Henan provinces of China tested by SPSS 20.0 and AMOS 25.0. Results show that quality responsibility has a significant positive influence on brand behavior loyalty and brand attitude loyalty, and both corporate emotional reputation and brand identification play mediating roles in the relationship between quality responsibility and brand behavior loyalty, and quality responsibility and brand attitude loyalty. Additionally, corporate cognitive reputation only plays a mediating role in the relationship between quality responsibility and brand behavior loyalty. Obtained conclusions in the study provide references for enterprise managers and government decision-makers in exploring management strategies of expediting future technological development and next-generation upgrades & transformations, improving quality and technology benchmarks, optimizing product quality responsibility system and promoting sustainable social development.     

工程项目供应链的委托-代理模型分析

从委托代理理论出发,对基于集成化供应链的委托-代理模型的一般形式进行讨论。在此基础上,结合工程项目集成化供应链中委托方和代理方的特点构建了工程项目供应链单期委托-代理模型和多阶段工程项目供应链声誉模型。     

电信运营商信誉对消费者移动支付的分析

为了深入了解电信运营商信誉对消费者移动支付使用意愿的作用机制,运用重复博弈对电信运营商信誉作为消费者使用意愿影响因素的原因进行分析,并从使用意愿形成的心理阶段对原因进行解释,进而提出电信运营商提升运营移动支付业务信誉的策略。     

公共关系策略是塑造企业形象的有效途径

通过研究分析企业形象的重要性,说明了树立企业形象、维护企业声誉、使企业走向成功的有效途径之一是施以相应的公关策略。     

大学声誉形成机理与管理策略——基于利益相关者的分析

大学声誉是在大学发展中起着重要作用的无形资产,是大学竞争优势的重要来源,探究其形成机理顺而提出管理策略是一个很有意义的课题。对此,大学的利益相关者理论提供了一个很好的分析框架。大学声誉的形成是关于大学的信息经编码、扩散,最终在人们的思维空间中收敛成一个能够完整代表大学的有较高清晰度的信号的过程,涉及"信息创造者"、"信息传播者"和"信息接收者"等角色。大学核心的、外围的、潜在的利益相关者在这一过程中分别对应着各自特定的角色。在利益相关者视角下,大学领导者应该分层面、按角色、因人而异地去实施大学声誉的管理。     

基于质量相似度的Web服务信誉度量

为提高Web服务信誉度量的灵活性和真实性,提出一种基于服务质量公告值和实际值相似度的Web服务信誉度量模型。通过上、下两层本体,描述了Web服务服务质量的语义和层次化的服务质量指标体系。提出一种支持层次化服务质量指标体系的质量相似度算法,并将质量相似度作为信誉度量的依据。信誉度量算法以统计理论为基础,引入遗忘因子和波动因子,并考虑了服务质量的发展趋势和波动情况对服务信誉的影响。实验表明,该模型具有良好的灵活性和实用性。     

语义Web服务信誉度模型及其实现

语义Web服务信誉度通过对一个语义Web服务过去的“表现”进行综合,为其预期的行为作出评价。针对语义Web服务的特点,提出了一种语义Web服务信誉度模型,并深入研究了其相关算法。该模型为服务信誉度加入了语义信息,并综合了第三方权威机构的评价,使得信誉度值更有效和准确。在此基础上,提出了一种将该信誉度模型与现有语义Web服务体系结构结合的实现方案,并给出了相关算法的实现思路和信誉度对象的类结构。     

移动计算环境下信任管理模型研究

移动计算环境下的移动主机,易受攻击,且其交互是对等的,考虑到节点的自主行为及恶意节点,仅靠密码学的安全体系是不够的,文章借鉴P2P信任管理提出移动计算环境下基于信誉的信任管理模型,模型对移动节点是透明的,节能的,对简单恶意节点和合谋欺诈有很好的抵抗作用。     

P2P开放网络资源共享信誉系统的研究与实现

网络信誉系统是一个用于综合运算、记录并发布各个客户端以往行为表现的系统。在P2P开放网络资源共享系统中,网络信誉系统起到了两个重要的作用：向用户提供信息以决定对方是否可信,激励交易双方在交易中保持良好的表现以提高自身的信誉度。该文介绍了P2P开放网络与信誉管理系统的概念,分析了现有的信誉系统、模型及其算法。在此基础上设计了新的模型,该模型以信任链方式查询节点信誉度,提出把信誉度分层的方法,通过Java实现了该系统,展望了网络信誉系统的发展方向。