During September 13–18, 2011, Dr. Jeffrey Yi-Lin Forrest delivered a plenary speech at the 15th WOSC (World Organisation of Systems and Cybernetics) International Congress on Cybernetics and Systems and the 2011 IEEE International Conference on Grey Systems and Intelligent Services in Nanjing, China.

The title of his speech was “Commonality and Differences between Interval Analysis and Grey Systems Theory.”

Over 200 scholars from different countries participated in the events.