基于有向异构图的发票明细税收分类方法(Tax Classification of Invoice Details Based on Directed Heterogeneous Graph) Peiyao Zhao author Qinghua Zheng author Bo Dong author Jianfei Ruan author Minnan Luo author 2020-10 text zho Proceedings of the 19th Chinese National Conference on Computational Linguistics Maosong Sun editor Sujian Li editor Yue Zhang editor Yang Liu editor Chinese Information Processing Society of China Haikou, China conference publication zhao-etal-2020-ji https://aclanthology.org/2020.ccl-1.72/ 2020-10 771 782