Chaoxi Niu Guansong Pang Ling Chen 0006 Affinity Uncertainty-Based Hard Negative Mining in Graph Contrastive Learning. 11681-11691 2024 September 35 IEEE Trans. Neural Networks Learn. Syst. 9 https://doi.org/10.1109/TNNLS.2023.3339770 db/journals/tnn/tnn35.html#NiuPC24 streams/journals/tnn