President Gan in Zheng Qiang's mouth is Gan Chunbiao of Zhejiang University. 1From September 1998 to June 2000, he was engaged in postdoctoral research on vibration, shock and noise in the Department of Mechanics. From July 2000 to June 2002, he was a visiting scholar at the Hong Kong Polytechnic University and participated in the scientific research cooperation of the project "Prediction and Assessment of Urban Noise". Since July 2002, he has been engaged in scientific research and teaching in the Department of Mechanics, School of Mechanical and Energy Engineering, Zhejiang University. So far, he has presided over and participated in the research work of many national natural science foundation projects, aviation basic science foundation projects, doctoral programs and postdoctoral fund-funded projects, won the excellent doctoral thesis award of Beihang University and the first prize of Tianjin Natural Science in 2002, and published more than 30 papers.