I received PhD, supervised by Prof. Zongben Xu, in the School of Mathematics and Statistics, Xi'an Jiaotong University, where I received my bachelor's degree in 2009, under the supervision of Prof. Deyu Meng. From Nov. 2013 to Nov. 2014, I was a visitor at the Human Sensing Lab and the Component Analysis Lab of The Robotics Institute, Carnegie Mellon University, working with Prof. Fernando De la Torre. I am currently a Professor with the School of Mathematics and Statistics, Xi'an Jiaotong University.