The previous page is sending you to http://zgykdxxb.cpu.edu.cn/jcpuen/article/pdf/20110114?file_name=B3147901C258E490E038A1CCCCBCE6E2D503A37832C91EDF73DEC5823156FAF8F7F0CA454E0B98BFD9169D8E2B381379239B719B81FAEC624738CCDA08C42FD3&open_type=self.

 If you do not want to visit that page, you can return to the previous page.