The crawling strategy and topic relevance algorithm of web spider is the core for vertical search engines.

在垂直搜索引擎中，网络蜘蛛的爬行策略和主题相关性判定算法是其核心。

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The algorithm is the core of the topic search engine and determines the search efficiency and quality.

主题搜索器的搜索算法，是搜索引擎的核心，它决定了搜索引擎的搜索效率和质量。

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To the question of building topic-specific search engine, an architecture is discussed and an algorithm of specialty webpages 'indices collected is put forward in this paper.

针对特定主题的搜索引擎构建问题，给出了一种主题搜索引擎的体系结构，并在此基础上，提出了面向主题的专业网页索引集构造算法。

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