| The continuous innovation of information technology has increased the ways and means of information diffusion and improved the efficiency and speed of information diffusion,which enables information to be widely disseminated in a short period of time.In the context of frequent infectious diseases and intensified global climate change,information related to epidemic prevention and green behavior is often spread among the population.The green behavior mainly refers to individual behaviors that are low-carbon and environmentally friendly,such as green travel,garbage sorting and green consumption,which can play a positive role in improving the environment and reducing carbon emissions.As individuals may have some differences in their views on epidemic prevention or green behaviors,multiple information containing different attitudes and opinions are frequently spread among the population at the same time.Moreover,the diffusion of this information usually has a certain impact on the prevention of epidemic and the promotion of green behaviors.At present,the dynamic characteristics of the diffusion of competitive information through multiple channels and the coupling spread of competitive information with infectious diseases and green behaviors still lack in-depth analysis and discussion.The dissemination of competitive information,infectious diseases and green behaviors usually takes place in multiple complex systems.The multilayer complex networks can describe the interaction relationship between these complex systems,which provides theoretical basis and method support for the study of the coupling propagation of multiple phenomena.Therefore,this thesis studies the dynamics of the coupling propagation and diffusion of competitive information,infectious diseases and individual green behaviors based on a two-layered complex network.The main innovations and contributions are summarized as follows:(1)The model of the coupled dissemination of two competitive information is established,and the dynamic characteristics of the simultaneous dissemination of two kinds of information online and offline are analyzed.The fixed and variable information dissemination rates are constructed,and the propagation dynamics equations of the proposed model are established.The outbreak threshold of each information is obtained when it is spread separately in the two-layered network,and the lower bound of the outbreak threshold of each information when two kinds of information are simultaneously spread is gained.Some simulation experiments are used to verify the theoretical analysis and further discuss the influence of the initial node selection method and the number of promotion nodes on the outbreak threshold and dissemination scale.(2)The coupled propagation model of positive and negative information and infectious diseases is established,and the interaction between two types of information and infectious diseases is explored.According to the dynamic equations,the epidemic threshold of the proposed model is derived.The impact of the related reports of the mass media on the coupled spread of the two types of information and infectious diseases is further discussed.The theoretical analysis and simulation results show that both kinds of information have a direct effect on epidemic size and threshold,and the mass media can indirectly affect the characteristics of the spread of infectious diseases by intervening in the diffusion of these two kinds of information.(3)The coupling diffusion model of positive and negative information and green behavior is constructed,and the coupling mechanism of information dissemination and green behavior diffusion is discussed.The public goods game model and the epidemic model are used to describe the diffusion process of green behavior in the model with and without benefits,respectively.Moreover,the green credit and policy intervention are also considered in the proposed models.The results show that in addition to the related information,individual benefits,green credit,and policy intervention also have an impact on the spread of green behavior.(4)The model of coupled spread of infectious diseases and green behaviors under the influence of two kinds of information is proposed,and the relationship between information,infectious diseases and green behaviors is analyzed.The impact of mass media and policy interventions on the green behavior diffusion is also considered in the proposed model.The dynamic equations of the proposed mode are constructed,and the outbreak thresholds of epidemics spread and green behaviors diffusion are obtained.The role of two kinds of information,mass media and policy interventions in the coupled spread of infectious diseases and green behaviors is discussed through simulation experiments. |
