基于网络谱的百度百科社区贡献者协作网络特征研究

发布时间：2018-05-27 00:31

本文选题：大众生产 + 百度百科　；参考：《华南理工大学》2013年博士论文

【摘要】：在线百科是典型的大众生产社区。本文基于网络谱方法探讨百度百科社区上大众生产者（贡献者）的异质性协作关系特征。具体工作体现在如下几个方面：根据“临界质量”理论的基本观点分析了社区贡献者的异质性以及参与特征。研究表明，社区内的贡献者在资源和“利益”方面都呈现出异质性。社区内容生产函数更多地属于加速生成函数。因此，百度百科社区满足内容产生并可持续发展的关键条件。此外，社区贡献者不论是“局部”贡献值，还是“整体”贡献值的分布都明显服从“少数”定律。不仅如此，由这些贡献者参与行为导致的社区内容的“严谨性”和“多样性”方面同样服从这种特征。提出采用反映贡献者异质性的网络分析方法研究贡献者的协作关系。研究表明，贡献者协作网络属于无标度异配型高聚集性网络。在知识专业性比较强的社区内，贡献者的协作网络特征与其在社区内的贡献值具有显著的相关性。反之，在知识专业性比较宽泛的社区内却不存在这种相关性。在采用动态网络分析相关性时发现，贡献者在网络中的连接强度、介数都始终与其编辑词条数存在较为显著的正相关性；而聚类系数则与之呈现出显著的负相关性。特别地，贡献者的接近中心性与其贡献值的相关性随着时间的演化出现明显的逆转现象。采用网络谱的分析方法研究了由网络结构导致的集体状态以及网络上的局域性特征。基于贡献者异质性，通过引入二次量子化算子表述下的分子系统Hückel模型，建立了一般网络谱和对应量子系统能量谱之间的关联性，拓展了网络谱的研究方法。研究结果表明：百度百科社区贡献者动态协作各截面网络导致的集体状态中，部分属于集体有序态，部分属于集体软混沌态。在紧束缚近似下，随着时间演化各截面网络上对应的电子运动状态愈发趋向于完全局域态，，且在演化中电子集体运动状态与其阶梯函数状态的偏差呈现出近似周期性波动。采用谱间距序列分析同样显示，部分截面网络对应的分子系统中电子集体运动的状态显著地处于局域态，而部分还处于中间态。采用时间序列分析方法分别研究网络谱的波动序列和趋势序列。研究发现，贡献者动态协作关系在不同时间截面上网络谱的波动序列特征满足幂律关系，且这种幂律关系服从量子系统中能量谱波动序列特征的普适规律。同时，贡献者动态协作关系网络各截面网络谱序列都具有多重分形结构特征。总之，本文研究了百度百科社区贡献者的协作关系的结构特征，提出反映个体异质性的一般网络的量子映射模型，建立了网络谱和量子系统能量谱的关联性。因此，既有实证研究的价值，同时还具有方法论的价值。
[Abstract]:Online encyclopedia is a typical mass production community. Based on the method of network spectrum, this paper discusses the heterogeneity of collaborative relationship between mass producers (contributors) in Baidu encyclopedia community. Specific work is reflected in the following areas: Based on the critical mass theory, the heterogeneity and participation characteristics of community contributors are analyzed. Research shows that contributors in the community show heterogeneity in terms of resources and benefits. Community content production functions are more of an accelerated generation function. Therefore, Baidu encyclopedia community to meet the content and sustainable development of the key conditions. In addition, the distribution of community contribution value, whether local or global, is obviously obeyed by the "minority" law. Moreover, the "rigour" and "diversity" of community content as a result of the involvement of these contributors also derive from this characteristic. A network analysis method reflecting the heterogeneity of contributors is proposed to study the cooperative relationship of contributors. The research shows that the cooperative network of contributors belongs to scale-free heterodyne high aggregation network. In communities with strong knowledge professionalism, the collaborative network characteristics of contributors are significantly correlated with their contribution in the community. On the other hand, this correlation does not exist in communities where knowledge specialization is broader. When using dynamic network to analyze the correlation, it is found that there is a significant positive correlation between the connection strength and the number of editing entries of the contributors in the network, while the clustering coefficient has a significant negative correlation with it. In particular, the correlation between the close centrality of contributors and their contribution values is reversed with the evolution of time. The collective state caused by the network structure and the local characteristics of the network are studied by the method of network spectrum analysis. Based on the heterogeneity of the contributors, by introducing the H 眉 ckel model of the molecular system described by the quadratic quantization operator, the correlation between the general network spectrum and the energy spectrum of the corresponding quantum system is established, and the research method of the network spectrum is expanded. The results show that: among the collective states caused by the dynamic collaboration of the community contributors of Baidu encyclopedia, some belong to the collective ordered state and part belong to the collective soft chaos state. In the tight-binding approximation, the corresponding states of electron motion on each cross-section network tend to be fully localized with the evolution of time, and the deviation between the state of collective motion of electrons and the state of its step function shows an approximate periodic fluctuation. The spectral interval series analysis also shows that the state of collective electron motion in the molecular system corresponding to the partial cross-sectional network is in the local state significantly while the part is still in the intermediate state. The time series analysis method is used to study the wave series and trend series of the network spectrum. It is found that the dynamic cooperative relationship of the contributors satisfies the power law relation of the wave sequence of the network spectrum on different time sections, and the power law relation obeys the universal law of the characteristic of the wave sequence of the energy spectrum in the quantum system. At the same time, the spectral sequences of each cross-section of the dynamic cooperative relationship network of contributors have multifractal structure. In a word, this paper studies the structural characteristics of the cooperative relationship of the community contributors of Baidu encyclopedia, proposes a quantum mapping model of the general network reflecting individual heterogeneity, and establishes the correlation between the network spectrum and the energy spectrum of the quantum system. Therefore, both the value of empirical research, but also the value of methodology.
【学位授予单位】：华南理工大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：F49;F224

【参考文献】