Zhi Zhang 0005 Tong He 0002 Hang Zhang 0005 Zhongyue Zhang Junyuan Xie Mu Li 0003 Bag of Freebies for Training Object Detection Neural Networks. 2019 abs/1902.04103 CoRR http://arxiv.org/abs/1902.04103 db/journals/corr/corr1902.html#abs-1902-04103