关键词: 知识推送, 关联知识, 三支决策, 推送成本

Abstract: Faced with the rapid growth of knowledge and the gradual formation of its dominant position in value creation, as a basic knowledge service method, knowledge push can effectively solve the problem of being lost in the direction of knowledge and accelerate the realization of knowledge value. A relevant knowledge push algorithm based on three-way decision was proposed based on a review of the existing recommendation techniques, and taking into account the importance of knowledge relevance, the dichotomy of traditional push decisions, and the cost of  knowledge push. Specifically, the association rule algorithm was used to mine the potential relationship between knowledge, and the knowledge relevance model which incorporates the knowledge attribute similarity and knowledge relevance was constructed, whose score could be predicted accordingly. In addition, in order to reduce the cost of misclassification in the traditional dichotomy, three-way decision ideas were introduced into the final recommendation decision to realize three-way push. Moreover, the superiority of the proposed knowledge push algorithm in terms of push effect and cost was verified by conducting a comparison experiment based on the Movielens datasets.

Key words: knowledge push, relevant knowledge, three-way decision, pushing cost