Created by: rockstone533

Pass 0, batch 4750, face loss 6.25504875183, head loss 5.29047966003, time 41.6653439999 Pass 0, batch 4760, face loss nan, head loss nan, time 42.216219902 Pass 0, batch 4770, face loss nan, head loss nan, time 42.0139110088

face_detection跑一段时间后出现nan，这是为什么？