1Shaanxi Province Machinery Manufacturing Equipment Key Laboratory, Xi′an University of Technology, Xi′an, Shaanxi 710048, China
2Centre for Lidar Remote Sensing Research, Xi′an University of Technology, Xi′an, Shaanxi 710048, China
3Key Laboratory of NC Machine Tools and Integrated Manufacturing Equipment of Xian University of Technology, Ministry of Education, Xi′an, Shaanxi 710048, China