Huiling Cai Fei Li Dianzhu Gao Yingze Yang Shuo Li 0006 Kai Gao 0010 Aina Qin Chao Hu Zhiwu Huang Foreign Objects Intrusion Detection Using Millimeter Wave Radar on Railway Crossings. 2776-2781 2020 SMC https://doi.org/10.1109/SMC42975.2020.9282881 conf/smc/2020 db/conf/smc/smc2020.html#CaiLGYLGQHH20