1. Robots double worldwide by 2020;International Federation of Robotics,2018
2. Intelligent manufacturing in the context of industry 4.0: A review;Zhong,2017
3. Europe 2020: A strategy for smart, sustainable and inclusive growth;Commission,2010
4. A National Strategic Plan for Advanced Manufacturing;Holdren,2012
5. Intelligent manufacturing-main direction of ‘made in China 2025’;Zhou,2015