作者机构:[1]School of Mathematics and Computer Science, Guizhou Normal University Guiyang 550001, P. R. China, [2]Faculty of Science, Xi'an Jiaotong University, Xi'an 710049, P. R. China
相关基金:Project supported by the National Natural Science Foundation of China (No. 10971166), the National Basic Research Program (No. 2005CB321703), and the Science and Technology Foundation of Guizhou Province of China (No. [2008]2123) Acknowledgements The Laboratory of Intelligent Information Processing and Computing at Faculty of Science of Xi'an Jiaotong University provided the parallel environment for this study.