Affiliation: | DING Keqin,LIU Chuntu,ZHAO Junyou and GUO Aiju Postdoctoral Fellow,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,P. R. China. Professor,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,P. R. China. Lecturer,Petroleum University of China,Shandong 257012,P. R. China. Engineer,Zhongyuan Petrochemical Corporation,Henan 457000,P. R. China. |