中文摘要：

E-mail： lxiaojdge@tongji.edu.cn,Dajie Ge received the MS degree from Tongji University, Shanghai, China, in 2016. Now he is a game developer at Shanda Games, Inc. His research interest is in crawler. E-mail：zhijun_ding@outlook.com.Zhijun Ding received the MS degree from Shandong University of Science and Technology, Taian, China, in 2001, and PhD degree from Tongji University, Shanghai, China, in 2007. Now he is a professor of Department of Computer Science and Technology, Tongji University. His research interests are in mobile internet, services computing, formal engineering, and Petri nets. He has published more than 80 papers in domestic and international academic journals and conference proceedings.