Page Rank algorithm PR Pr=d PRi: the Page Rank value of page i PRj: the PageRank value of page j k: number of the pages refer to d: a parameter ranging [0, 1] ebusinessPageRank Algorithm PRi :the PageRank value of page i PRj : the PageRank value of page j kj :number of the pages j refer to d:a parameter ranging [0,1]. ? = ∑ + − j j j i d k PR PR d (1 )