YUN-LI CHENG1,*, HAI-NIE MENG2,+, YU-QIANG CHEN3,
YAN-XIAN TAN1,** AND JIAN-LAN GUO3
1Software Engineering Institute of Guangzhou
Guangdong, 510990 P.R. China
E-mail: {767220031*; 1040558213**}@qq.com
2Guangzhou Nanyang Polytechnic College
Guangzhou, Guangdong, 510925 P.R. China
+E-mail: 412131779@qq.com
3Dongguan Polytechnic, Dongguan, 523808 P.R. China