To explore the green development of automobile enterprises and promote the achievement of the“dual carbon”target,based on the bounded rationality assumptions,this study constructed a tripartite evolutionary game mod...To explore the green development of automobile enterprises and promote the achievement of the“dual carbon”target,based on the bounded rationality assumptions,this study constructed a tripartite evolutionary game model of gov-ernment,commercial banks,and automobile enterprises;introduced a dynamic reward and punishment mechanism;and analyzed the development process of the three parties’strategic behavior under the static and dynamic reward and punish-ment mechanism.Vensim PLE was used for numerical simulation analysis.Our results indicate that the system could not reach a stable state under the static reward and punishment mechanism.A dynamic reward and punishment mechanism can effectively improve the system stability and better fit real situations.Under the dynamic reward and punishment mechan-ism,an increase in the initial probabilities of the three parties can promote the system stability,and the government can im-plement effective supervision by adjusting the upper limit of the reward and punishment intensity.Finally,the implementa-tion of green credit by commercial banks plays a significant role in promoting the green development of automobile enter-prises.展开更多
针对委托权益证明(delegated proof of stake,DPoS)中节点投票不积极和恶意节点操纵选举结果的问题,提出一种基于共邻节点相似度改进的DPoS(DPoS based on similarity of common neighbor nodes,S-DPoS)共识算法。首先,引入共邻节点相...针对委托权益证明(delegated proof of stake,DPoS)中节点投票不积极和恶意节点操纵选举结果的问题,提出一种基于共邻节点相似度改进的DPoS(DPoS based on similarity of common neighbor nodes,S-DPoS)共识算法。首先,引入共邻节点相似度模型实现社区划分,缩短投票周期,提高共识效率。其次,计算节点的信誉度,各社区选出一个信誉度最高的节点作为见证节点且负责生产区块,通过节点身份转换机制及时更新节点类别。最后,通过奖惩机制对节点进行奖惩,快速剔除错误节点。仿真实验结果表明,S-DPoS共识算法的节点参与度比DPoS算法提高30%~40%,并且能够有效降低恶意节点操纵选举结果的可能性,增强了系统的安全性。展开更多
基于在区块链系统中利用共识机制使节点快速、安全的达到数据一致性的目的,文中提出了一种改进的股权授权证明(Delegated Proof Of Stake,DPOS)共识机制,采用基于信用奖惩和投票结果选择优化两个核心方案实现快速剔除异常节点以提高系...基于在区块链系统中利用共识机制使节点快速、安全的达到数据一致性的目的,文中提出了一种改进的股权授权证明(Delegated Proof Of Stake,DPOS)共识机制,采用基于信用奖惩和投票结果选择优化两个核心方案实现快速剔除异常节点以提高系统安全性。通过搭建分布式网络进行实验,对比分析了机制改进前后的实验结果,验证了在基于信用的奖惩机制下,异常节点再次成为代理节点的概率由84%降低到了5%;并且异常节点被踢出代理所需投票轮数由2.5轮降低到了1.1轮,从而降低了异常节点对系统的影响。展开更多
基金supported by the National Natural Science Foundation of China(71973001).
文摘To explore the green development of automobile enterprises and promote the achievement of the“dual carbon”target,based on the bounded rationality assumptions,this study constructed a tripartite evolutionary game model of gov-ernment,commercial banks,and automobile enterprises;introduced a dynamic reward and punishment mechanism;and analyzed the development process of the three parties’strategic behavior under the static and dynamic reward and punish-ment mechanism.Vensim PLE was used for numerical simulation analysis.Our results indicate that the system could not reach a stable state under the static reward and punishment mechanism.A dynamic reward and punishment mechanism can effectively improve the system stability and better fit real situations.Under the dynamic reward and punishment mechan-ism,an increase in the initial probabilities of the three parties can promote the system stability,and the government can im-plement effective supervision by adjusting the upper limit of the reward and punishment intensity.Finally,the implementa-tion of green credit by commercial banks plays a significant role in promoting the green development of automobile enter-prises.
文摘针对委托权益证明(delegated proof of stake,DPoS)中节点投票不积极和恶意节点操纵选举结果的问题,提出一种基于共邻节点相似度改进的DPoS(DPoS based on similarity of common neighbor nodes,S-DPoS)共识算法。首先,引入共邻节点相似度模型实现社区划分,缩短投票周期,提高共识效率。其次,计算节点的信誉度,各社区选出一个信誉度最高的节点作为见证节点且负责生产区块,通过节点身份转换机制及时更新节点类别。最后,通过奖惩机制对节点进行奖惩,快速剔除错误节点。仿真实验结果表明,S-DPoS共识算法的节点参与度比DPoS算法提高30%~40%,并且能够有效降低恶意节点操纵选举结果的可能性,增强了系统的安全性。
文摘基于在区块链系统中利用共识机制使节点快速、安全的达到数据一致性的目的,文中提出了一种改进的股权授权证明(Delegated Proof Of Stake,DPOS)共识机制,采用基于信用奖惩和投票结果选择优化两个核心方案实现快速剔除异常节点以提高系统安全性。通过搭建分布式网络进行实验,对比分析了机制改进前后的实验结果,验证了在基于信用的奖惩机制下,异常节点再次成为代理节点的概率由84%降低到了5%;并且异常节点被踢出代理所需投票轮数由2.5轮降低到了1.1轮,从而降低了异常节点对系统的影响。
