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基于遗传算法的主题爬虫策略 被引量:14

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摘要 针对目前主题搜索策略的不足,通过改进遗传算子提出了一种新的主题爬虫策略,即通过变异操作引入新的URL扩大搜索范围;通过交叉操作产生大量的URL;通过选择操作选出适应度高的个体作为下一代的种子。实验结果表明,基于遗传算法的主体搜索策略GA与BFS和OPS相比,爬虫策略取网页中的主体相关网页数量多,在合理选择种子集合时,能抓取大量的主体相关度高的网页。
出处 《计算机应用》 CSCD 北大核心 2007年第B12期172-174,179,共4页 journal of Computer Applications
基金 北京市自然科学基金(4062013)
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