On September 29, 2021, Dr. Zhiyuan Li completed the opening report of his doctoral thesis. Prof. Qing Zhang, Prof. Wenxiong Huang, Prof. Dan Huang, Prof. Tiantang Yu, Prof. Lei Wang, Dr. Yepeng Xu, and Prof. Zaixing Huang of Nanjing University of Aeronautics and Astronautics were invited to the meeting and put forward valuable modification suggestions for Dr. Zhiyuan Li. It is hoped that Dr. Zhiyuan Li will seriously absorb expert suggestions and complete his doctoral thesis with high quality.