Affiliation: | Liuqiang Zhong Shi Shu School of Mathematical , Computational Sciences,Xiangtan University,Xiangtan 411105,China Gabriel Wittum Simulation , Modelling Goethe-Center for Scientic Computing,Goethe-University,Kettenhofweg 139,60325 Frankfurt am Main,Germany Jinchao Xu Department of Mathematics,Pennsylvania State University,University Park,PA 16802,USA |