The adoption behaviors refer to some activities or topics (tweets, products, Hashtags, URLs, etc.) shared among users implicitly and explicitly such as users forwarding a message to their friends, recommending a product to others, joining some groups with the similar musical favor, and posting messages about the same topics, etc. According to the diffusion theory, the information cascades from social leaders to followers. In most diffusion models, propagators have certain probabilities to influence their receivers, and the receivers also have certain thresholds to be influenced. Finding the social leaders or the users who can maximize the influence coverage in the network is the major goal of most diffusion models.