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虚假新闻检测论文阅读(二):Semi-Supervised Learning and Graph Neural Networks for Fake News Detection
2022-07-29 05:21:00 【Quinn-ntmy】
论文标题:Semi-Supervised Learning and Graph Neural Networks for Fake News Detection
论文来源:IEEE 2019
#基于新闻文本、#半监督、#图结构
一、文章动机
1、数据标签通常非常模糊和稀疏,故选择半监督检测方法;
2、图模型富有表现力,能够捕获文章之间的上下文依赖关系,从而缓解标签不足的问题。
二、框架
1、使用词嵌入获得文章在低维中的向量表示;
2、通过基于图的表示方案捕获文章之间的上下文相似性;
3、在有限的标记数据上利用图神经网络进行分类任务。
三、模型组成
1、文章的向量表示:基于预先训练的Glove词嵌入,计算文章中出现单词的平均向量;
2、文章之间相似性图的构建:文章作为图的节点,根据embedding space中的欧几里得距离寻找k-nearest neighbours,构建连边;
3、分类:使用两种图神经网络方法,GCN和AGNN(注意力图神经网络)。
四、实验结果
数据集中共有150个标注的文章,75真,75假。
这篇论文是2019年,(一)论文是2021年,但其实这样看来,2021年的那篇论文并没有什么太大的创新,仅仅在计算相似性上利用了WMD算法,且在公开的几个数据集上进行实验,取得了较好的结果??
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