期刊论文

Liu, J.;Zhou, G.

英文

IEEE Transactions on Cognitive and Developmental Systems

2379-8920

2023

15

3

1183-1195

10.1109/TCDS.2022.3198272

10.13039/501100001809-National Natural Science Foundation of China (Grant Number: 61972290 and 61972173) 10.13039/501100012166-National Key Research and Development Program of China (Grant Number: 2018YFC1604000) 10.13039/501100012226-Fundamental Research Funds for the Central Universities (Grant Number: CCNU22QN015)

本校为通讯机构

Multihop question answering from knowledge bases (KBQA) is a hot research topic in natural language processing. Recently, the graph neural network-based (GNN-based) methods have achieved promising results as the KB can be organized as a knowledge graph (KG). However, they often suffered from the sparsity of the KG which was detrimental to the structure encoding and reasoning capabilities of GNN. Specifically, a KG is a sparse graph linked by directed relations and previous studies have paid scant attention to the directional characteristic of r...