中文说明： fast_rcnn是最近才兴起的一种技术，应用在行人检测上面取得了较为不错的成就，已经是一种比较优越的算法，希望与大家共同学习。
English Description：
fast_ RCNN is a newly emerging technology, which has achieved good results in pedestrian detection. It is already a superior algorithm. I hope we can learn from it together.