社會(huì)網(wǎng)絡(luò)上連續(xù)觀點(diǎn)動(dòng)力學(xué)演化及在線預(yù)測(cè)應(yīng)用
[Abstract]:In recent years, the study of complex social group behaviors and phenomena by natural science has attracted extensive interest and attention. View dynamics uses Agent-based modeling and simulation to study the evolution of individual views from disorder to order in social groups. Opinion Dynamics holds that the formation and evolution of an individual's views are influenced by both his own and other individuals'views around him. It attempts to establish a model to analyze and explain the propagation, evolution and emergence of opinion clusters. Understanding and understanding, designing a better decision-making and discussion process for large-scale population, guiding and controlling the dissemination of public opinion and reaching consensus are of great theoretical and practical significance. Research on the Formation of Free Speaking Views on Social Networks. Interaction among individuals in a group forms a directed scale-free network. Based on the bounded trust hypothesis, a continuous viewpoint dynamics model on directed social networks is proposed to study the effects of speech order and topological structure of social networks on viewpoint formation and evolution. The opinions of the individuals who engrave his opinions are constantly approaching his opinions; using probabilistic order to form fewer opinion clusters, larger maximal clusters, smaller standard deviations, and to achieve a moderate degree of consensus with fewer waiting times than using random order; and with the reduction of scale-free distribution parameters or the increase of trust levels, the two statements The sequential results are better; the gap between the results decreases with the decrease of the network size. 2. Research on the evolution of opinion in turn. In view of the lack of consideration of different weights of individual trust and opinions in the continuous view dynamics model, the finite trust hypothesis is modified by introducing the trust degree between individuals and the similarity between opinions. Limited Impact Hypothesis (LIH) extends the Hegselmann-Krause (HK) model to a weighted view updating model to study the effects of a small number of paranoid and authoritative individuals on opinion formation, evolution and consensus building processes in social groups. Simulation results show that the initial views of the two groups are as close as possible to the midpoint 0.5 or increase in the opinion distribution interval. The influence threshold of paranoid individuals and the trustworthiness of authoritative individuals can make the group form fewer and larger opinion clusters. The simulation results show that under the same initial conditions, authoritative experts are preferred in the round-robin variant and the free-spoken variant, and then the speaker who has the greatest cumulative change of opinion prefers to speak smoothly. The number of viewpoint clusters generated by the order rules is less, and the number of speakers around 15 rounds is the threshold of the change rate of viewpoint clusters. 3. The co-evolution of continuous viewpoints and directed adaptive networks is studied by extending the HK model. The simulation results show that in a static network, the final point of view is affected by the initial characteristics of the network, while in a directed adaptive network, the final point of view is basically affected by the reconnection probability. The increase makes the average degree of the network increase, strengthens the connection between individuals, and makes the result of the adaptive network better than that of the static network. 4. Research on online scoring population prediction based on continuous view dynamics. Whether to join the scoring group or not, if joined, will produce scoring behavior, and then affect the opinions and behaviors of subsequent individuals. A simple continuous view dynamic model is established to predict the number of people scoring online. Individuals'final opinions are mainly influenced by the group's poor-middle-good points, but have little to do with their own initial opinions. The farther the Poisson parameter value deviates from the optimal value (1.25), the lower the prediction accuracy.
【學(xué)位授予單位】:國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2014
【分類號(hào)】:TP393.02
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