Provided by: Science & Engineering Research Support soCiety (SERSC)
Currently, the efficiency of the existing focused crawlers is not high because of their unsatisfactory precision. In this paper, the authors analyze the URL analysis methods of the existing focused crawlers, and propose a URL analysis algorithm based on the semantic content and link clustering in cloud environment. In this algorithm, the download URLs are clustered with the philosophy of clustering on the basis of VSM (Vector Space Model) to improve the precision of the focused crawler according to the correlation between download URLs and new URLs. The algorithm is evaluated on Heritrix3.10 compared with best first search algorithm and Shark search algorithm.