Sifeng Liu

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Professor at Nanjing University of Aeronautics and Astronautics, Professor at Henan Agricultural University from 1994-2000, Founder and Director of Institute for Grey Systems Studies at Nanjing University of Aeronautics and Astronautics, Nanjing, China, Honorary Fellow of the World Organization of Systems and Cybernetics and Editor of Grey Systems, Research Professor with Prof. Yingjie Yang at De Montfort University, Visiting professor at Slippery Rock University of Pennsylvania from 1996-1997