基于用戶活躍度和熱門話題的微博社區(qū)推薦技術研究
[Abstract]:Weibo provides a wide platform for people to share information anytime and anywhere in their virtual community, attracting more and more users, including Twitter and Chinese Sina Weibo. Most of the user relationships in Weibo are asymmetrical, because a user can have a lot of fans, but that user doesn't need to focus on these fans in the past. Users have sufficient initiative to choose and determine their own actions rather than passively. Because of this asymmetry, Weibo became the medium of broadcast communication, in which information spread in a large scale network formed by the interaction of multiple nodes. However, how to get the most valuable information quickly and efficiently is very important in this vast information community. Weibo's community recommendation can be regarded as filtering and recommending the updated information in a certain period of time and recommending the latest and most useful information to the user. At present, many scholars at home and abroad put forward Weibo community model and Weibo community recommendation algorithm to improve the accuracy of community recommendation, and achieved certain results. However, with the continuous development of network technology and the continuous updating of social tools, the ways and platforms of people expressing their views are diverse, and the social ways are also gradually changing. This makes the traditional Weibo community recommendation method not enough to meet the needs of new social networks. Based on the above background, this paper introduces the basic theory of Weibo community, analyzes the existing community recommendation technology of Weibo, and puts forward a community recommendation method based on user activity and popular topic. The main contents of this paper are as follows: (1) based on the existing Web community model, this paper analyzes the behavior relationship among users in Weibo community, the scope of community communication, and constructs the behavior model and communication process model. And the characteristics of Weibo community were analyzed. (2) the basic analysis of the activity degree of Weibo users was made, and the relationship between the number of tweets and the number of users was given. The relationship between the number of tweets and the number of followers. (3) based on the analysis of the interest of users and the discussion of the relationship of concern among users, the importance of time factors in the process of testing hot topics by Weibo is studied. And by improving the classical algorithm PageRank proposed a hot topic detection algorithm considering time factors. (4) proposed Weibo community recommendation algorithm based on user activity and hot topics. From the aspects of "activity" and "popularity", the active users in Weibo community and the hot topics discussed in the community are recommended to the new users in the community in order to improve the search speed and efficiency of these new users. It is fast and accurate to obtain information. (5) the proposed method is verified experimentally, and the effectiveness of the proposed method is verified by the experimental results on the real data set.
【學位授予單位】:蘭州交通大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TP393.092;TP391.3
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