Research on Topic Identification Technologies of Professional Search Engine Based on Hyperlink Analysis

In the face of difficulties and challenges of traditional search engine, the professional search engine turns up which can meet the needs of special group and is convenient to collect particular subjects or special Web topic resources. This paper analyzes 4 professional search engines´ techniques of hyperlink analysis for topic identification and their algorithms. Furthermore, we find out some problems to these algorithms and give some advices for future research.