Open access
Submitted: October 8th, 2010 Published: April 20th, 2012
DOI: 10.5772/16318
From the Edited Volume
Edited by Yuzhou Luo
Submitted: October 8th, 2010 Published: April 20th, 2012
© 2012 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution 3.0 License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.