Professor Chang Xintan, Ph.D., doctoral supervisor. Male, Han nationality, 1946, born in Xiangyin, Hunan. He used to be president of Xi 'an University of Science and Technology, director of academic committee, chairman of academic degree committee, leader of national key discipline safety technology and engineering, director of China Labor Protection Science and Technology Society, and executive director of Shaanxi Coal Society. , and obtained a master's degree in mining engineering and a doctorate in engineering mechanics from Michigan University of Technology.