基于幂律分布的网络用户快速排序算法

被引:5
作者
张玥
张宏莉
张伟哲
机构
[1] 哈尔滨工业大学计算机科学与技术学院
关键词
幂律; 入度; 集合划分; 快速排序;
D O I
暂无
中图分类号
TP301.6 [算法理论]; TP393.094 [];
学科分类号
摘要
随着网络论坛、博客、微博的发展,引出社会网络中的用户排序问题。将在线网络论坛中用户映射为节点,用户评论过程中形成的回复关系映射为有向关联图,其节点度符合幂律分布。且论坛中用户的主题发布行为和回复关系符合Pagerank算法的互增强和随机游走特性,因此选用Pagerank算法排序用户影响力。该文提出的研究问题:如何提高用户排序应用中数据的存储和运行效率。天涯网络论坛中80%以上用户入度为0,据此,根据入度是否为0划分为两个集合,对入度为0集合按出度构造链接表,设计了基于集合划分的高效排序算法SD-Rank。SD-Rank时空复杂性为O(V′),V′为入度非0节点集。对天涯网络论坛真实用户数据的实验结果表明:SD-Rank算法时空复杂性优于Pagerank算法。
引用
收藏
页码:122 / 128
页数:7
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