Abstract: This paper introduces the definition, the characteristic and the limitation of PageRank algorithm used by Google and other search engine. It develops a system, ocean search system, which is based on Ontology and PageRank algorithm. However, because of PageRank algorithm’s insufficiencies in this system, a new algorithm is proposed and applied in the system’s consummation. It introduces the functions of the ocean search system and takes an illustration and test to the new algorithm.

Key words: PageRank algorithm, IPageRank algorithm, theme-relativity, Ontology

摘要： 介绍Google等搜索引擎应用的PageRank算法的定义、特点及缺陷。针对PageRank算法在基于Ontology的海洋文档检索系统应用中的问题对其加以改进，增加了文本文档的判断和主题相关性的判断，提出IPageRank算法。介绍海洋文档检索系统，并将改进的IPageRank算法应用于该系统中进行验证。

关键词: PageRank算法, IPageRank算法, 主题相关, 本体

CLC Number: 

• TP312