Submitted on: 03 November 2015.
Revised on: 11 December 2015.
Accepted on: 31 December 2015.
___________________Communications in Applied Mathematics and Computational Science
http://reply.papertrans.cn/1/61/6002/6002-32.png
http://reply.papertrans.cn/1/61/6002/6002-33.png
Submitted on: 02 April 2006.
Revised on: 10 June 2006.
Accepted on: 22 July 2006.
___________________Communications in Applied Mathematics and Computational Science
http://reply.papertrans.cn/1/61/6002/6002-35.png
http://reply.papertrans.cn/1/61/6002/6002-36.png