计算机科学 ›› 2020, Vol. 47 ›› Issue (6): 201-209.doi: 10.11896/jsjkx.200200117
张志扬, 张凤荔, 陈学勤, 王瑞锦
ZHANG Zhi-yang, ZHANG Feng-li, CHEN Xue-qin, WANG Rui-jin
摘要： 信息级联预测(Information Cascade Prediction)是社交网络分析领域的一个研究热点,其通过信息级联的扩散序列与拓扑图来学习在线社交媒体中信息的传播模式。当前的信息级联预测模型大多以循环神经网络为基础,仅考虑信息级联的时序结构信息或者序列内部的空间结构信息,无法学习序列之间的拓扑关系。而现有的级联图结构学习方法无法为节点的邻居分配不同的权重,导致节点之间的关联性学习较差。针对上述问题,文中提出了基于节点表示的信息级联采样方法,将信息级联建模为节点表示而非序列表示。随后提出一种基于分层注意力的信息级联预测(Information Cascade Prediction with Hierarchical Attention,ICPHA)模型。该模型首先通过结合了自注意力机制的循环神经网络来学习节点序列的时序结构信息;然后通过多头注意力机制学习节点表示之间的空间结构信息;最后通过分层的注意力网络对信息级联的结构信息进行联合建模。所提模型在Twitter,Memes,Digg这3种数据集上达到了领先的预测效果,并且具有良好的泛化能力。
中图分类号:
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