图 书 馆
具有长期互动的社会经济网络Socioeconomic Networks with Long-range Interactions |
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| 课程网址: | http://videolectures.net/eccs07_carvalho_snl/ |
| 主讲教师: | Rui Carvalho |
| 开课单位: | 伦敦大学学院 |
| 开课时间: | 2007-11-27 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | In well networked communities, information is often shared informally among an individual's direct and indirect acquaintances. Here we study a model previously proposed by Jackson and Wolinsky to account for communicating information and allocating goods in socioeconomic networks. The model defines a utility function of node i which is a weighted sum of contributions from all nodes accessible from i. First, we show that scale-free networks are more efficient than Poisson networks for the range of average degree typically found in real world networks. We then study an evolving network mechanism where new nodes attach to existing ones preferentially by utility. We found the presence of three regimes: scale-free (rich-get-richer), fit-get-rich, and Poisson degree distribution. The fit-get-rich regime is characterized by a decrease in average path length. |
| 关 键 词: | 网络; 泊松度分布; 无标度网络 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-10-22：chenxin |
| 阅读次数: | 78 |