Julong Deng

Julong Deng (1933 – June 22, 2013) was a professor of Huazhong University of Science and Technology, Wuhan, China. He is acknowledged as the founder of Grey System Theory (GST) that he proposed in 1982 with the publication of his paper “Control problems of grey systems,” in the international journal Systems and Control Letter, edited at the time by Roger W. Brockett. His theory inspired many noted scholars like Jeffrey Yi-Lin Forrest and Sifeng Liu. He proposed for the first time Grey relational analysis (Deng's Grey Incidence Analysis model) to figure out the relationship between different variables using grey degrees.

He was honored at the 2011 congress of the World Organisation of Systems and Cybernetics by the award of an Honorary Fellowship.

He died at the age of 80 in China.