中文摘要：

To whom correspondence should be addressed. E-mail： Jessielee543@yahoo. com. cn Li Ying, born in 1974, is an associate professor in Soochow University. She received the Ph. D. degree from Shanghai Jiaotong University in computer science in 2007. She also received her B.S. and M.S. degrees from Tongji University in 1996 and Suzhou University in 1999 respectively. Her research interests include the wireless network and sensor network and grid computing systems.