1. Research Engineer, PhD, State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum (East China), 66, Changjiang West Rd., Economic & Technological Development Zone, Qingdao, Shandong Province, CN, e-mail: jianming_wei@yahoo.com
2. Professor, PhD, State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum (East China), 66, Changjiang West Rd., Economic & Technological Development Zone, Qingdao, Shandong Province, CN, e-mail: zhangyuzhen1959@163.com