Recently, researches have explored the graph neural network (GNN) techniques on text classification, since GNN does well in handling complex structures and preserving global information. However, previous methods based on GNN are mainly faced with the practical problems of fixed corpus level graph structure which do not support online testing and high memory consumption. To tackle the problems, we propose a new GNN based model that builds graphs for each input text with global parameters sharing instead of a single graph for the whole corpus. This method removes the burden of dependence between an individual text and entire corpus which support online testing, but still preserve global information. Besides, we build graphs by much smaller windows in the text, which not only extract more local features but also significantly reduce the edge numbers as well as memory consumption. Experiments show that our model outperforms existing models on several text classification datasets even with consuming less memory.

提出了一种新的基于图神经网络的模型，通过全局参数共享建立每个输入文本的图形而不是整个语料库的单个图形，这种方法支持在线测试，同时提取更多的本地特征和显著降低边缘数量以及内存消耗，在多个文本分类数据集上性能优于现有模型。

基于文本级图神经网络的文本分类