Abstract: In this paper first bipartite graph was project based on mass diffusion, then random walk method was used to get collaborative filtering results. Degree correlation between users and objects was embedded into the similarity index to improve the algorithm The numerical simulation shows that the algorithmic accuracy of the presented algorithm is improved by 18. 19% in the optimal case and the diversity is improved by 21. 90%. The statistical analysis on the prodtrct distribution of the user and object degrees indicates that, in the optimal case, the distribution obeys the power-law and the exponential is equal to--2. 33.

Key words: Recommendation systems,I3ipartite network,Collaborative filtering