This work was supported in part by the National Natural Science Foundation of China under Grant 61772561, in part by the Key Research and Development Plan of Hunan Province under Grant 2018NK2012, in part by the Postgraduate Research and Innovation Project of Hunan Province under Grant CX2018B447, in part by the Postgraduate Science and Technology Innovation Foundation of the Central South University of Forestry and Technology under Grant 20183034 and Grant 20183027, and in part by the Key Laboratory for Digital Dongting Lake Basin of Hunan Province.