Yue Zhang 0076 Chen Jue Wanxiao Liu Yurui Ma GRAN: a SDN intrusion detection model based on graph attention network and residual learning. 241-260 2025 68 Comput. J. 3 https://doi.org/10.1093/comjnl/bxae108 db/journals/cj/cj68.html#ZhangJLM25 streams/journals/cj