1. South China University of Technology,China
2. Tencent Robotics X,Shenzhen,Guangdong Province,China
3. Neuroinformatics Group, Center for Cognitive Interaction Technology (CITEC), Bielefeld University,Bielefeld,Germany,33619
4. Guangdong University of Technology,China
5. Imperial College London,UK
6. the University of the West of England,Bristol Robotics Laboratory,UK