1. School of Technology, Beijing Forestry University, Beijing, People’s Republic of China
2. Research Center for Biodiversity Intelligent Monitoring, Beijing Forestry University, Beijing, People’s Republic of China
3. Joint International Research Institute of Wood Nondestructive Testing and Evaluation, Beijing Forestry University, Beijing, People’s Republic of China
4. Department of Wood Science, Faculty of Forestry, University of British Columbia, Vancouver, Canada