Opinion Leaders' Mining In Social Network And Its Effect Analysis On Community Evolution

With the rapid development of the Internet,users gradually become the leader of the social media.The abruptly rise of the new media changes the pattern and regular pattern of the traditional information's transmission.Opinion leader?gatekeeper in the classical public propagation theory has new time significance and it has been broadened and extended in a certain degree.The existing opinion leaders mining is mainly from the direction of network structure and the users' behavior,it ignores an important attribute whether the user has really impact on others.In view of opinion leaders,how to get opinion leaders that are more effective and more accurate has important significance to the public opinion guide?network security and product promotion.Social network has penetrate into our daily life and become a kind of indispensible communicate tool.User is not an independent individual in the social network,due to the common interest?hobbies or profession and so on makes the user trend to one common life circle,Own to the social resource different users have different utterance rights,or different impact.The existence of the opinion leaders and their activities in the community lead to different growth states.So in the community,how do the opinion leaders impact the evaluation of the community?In this paper,we study the mining of the opinion leaders and the influence of opinion leaders on community evolution.Aim at opinion leaders' mining,we make use of the signed network as the study tool,through give a relevant sign which represent the positive or negative opinions to the relationship chaining,combined traditional opinion leaders mining algorithm with the sign relationship that can descript opinion changes in the signed network find out the opinion leaders which really impact others,and then we finally get more effective opinion leaders.Counter the opinion leaders' impact on the community,we start our study from the scale of the community?the activities of the users in the community and the fluctuate degree of the users and display opinion leaders' specific impact on community evolution in the form of graphic.