Zhongbao Kou, Changshui Zhang
State Key Laboratory of Intelligent Technology and Systems, Department of Automation, Tsinghua University, Beijing 100084, People's Republic of China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Mar;67(3 Pt 2):036117. doi: 10.1103/PhysRevE.67.036117. Epub 2003 Mar 24.
Using data from a bulletin board system (BBS), we constructed reply networks for various boards, which can be considered as social networks connecting people of the same interests. In these networks, identifications (IDs) are treated as nodes and reply articles set up links. We investigated some statistics on these reply networks, such as clustering coefficients, characteristic path lengths, degree distributions, etc., and showed small-world characteristics and scale-free degree distributions of these reply networks. Then we put forward a model of interest space, which is the basis of the reply networks. We indicated that the hierarchical and clustering structure of the interest space, together with overlapping interests of IDs not only result in small-world characteristics of reply networks on BBS, but also give rise to preferential attachment, which is a popular explanation for scale-free features.
利用来自公告板系统（BBS）的数据，我们构建了各个板块的回复网络，这些网络可被视为连接具有相同兴趣人群的社交网络。在这些网络中，标识符（ID）被视为节点，回复文章建立链接。我们研究了这些回复网络的一些统计数据，如聚类系数、特征路径长度、度分布等，并展示了这些回复网络的小世界特征和无标度度分布。然后我们提出了一个兴趣空间模型，它是回复网络的基础。我们指出，兴趣空间的层次和聚类结构，以及ID的重叠兴趣，不仅导致了BBS上回复网络的小世界特征，还产生了优先连接，这是对无标度特征的一种常见解释。
