关键词: 新浪微博, User PR值, 用户活跃度, 用户影响力, 幂律分布

Abstract: Based on the relationship network of Weibo users, the number of fans, User PR values and users’ activities are considered as measurements of users’ influence on Weibo with the distributions of the three factors. Results show that both the distributions of the number of fans and User PR values follow power-law distribution. It is found that there are much more verified users in top User PR ranking list than in fans ranking list and it is suggested that top activity users are much more popular in advertisement campaign after analyzes the top users and their posts in fans ranking, User PR ranking and activity ranking. It is also found that Sina Weibo users prefer to repost and comment on other users’ Weibo. There are a large number of images, videos and links on Sina Weibo, and most of them are reposted from another user.

Key words: Sina Weibo, User PR values, user activity, user influence, power-law distribution