School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China;
School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China;
Centre of Nonlinear Studies and Department of Physics,Hong Kong Baptist University,Hong Kong,China;
Centre of Nonlinear Studies and Department of Physics,Hong Kong Baptist University,Hong Kong,China;
Department of Physics,University of Houston,Houston,TX 77204,USA;
Department of Physics,University of Houston,Houston,TX 77204,USA;
Department of Physics,Beijing Normal University,Beijing 100875,China;
