1. Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, P.R. China
2. Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, P.R. China
3. Institute of Robotics & Intelligent Systems, Xi’an Jiaotong University, Xi’an 710049, P.R. China
4. Shaanxi Mining Industry and Trade Co., Ltd., Xi’an 710000, P.R. China