I obtained a doctorate from Beihang university, and my research subjects are pattern recognition and machine learning. Some published papers are as follows:(1) Liu Liu, Fuqiang Zhou, Yuzhu He. Automated visual inspection system for bogie block key under complex freight train environments. IEEE Transactions on Instrumentation & Measurement. 2015,65(1):1-13.(2) Liu Liu, Fuqiang Zhou, Yuzhu He. Vision-based fault inspection of small mechanical components for train safety. IET Intelligent Transport Systems.2015,10(2):130-139.(3) Liu Liu, Fuqiang Zhou, Yuzhu He. Automated status inspection of fastening bolts in freight trains based on machine vision approach. Proceedings of the Institution of Mechanical Engineers Part F: Journal of Rail and Rapid Transit. 2015,230(7):1159-1166.(4) Liu Liu, Fuqiang Zhou, Yuzhu He. An improved study of locality sensitive discriminant analysis for object recognition. International Conference on Optical and Photonic Engineering 2015. 2015: 95240O-95240O-8. (EI).