Affiliation: | 1. School of Mathematics and Statistics, Xidian University, Xi’an, China;2. School of Science, Xi’an Technological University, Xi’an, China;3. School of Science, Air Force Engineering University, Xi’an, China;1. Instituto de Matemática, Estatística e Computação Científica, University of Campinas, R. Sérgio Buarque de Holanda, 651, 13083-859, Campinas, Brazil;2. Instituto de Tecnologías Físicas y de la Información, Consejo Superior de Investigaciones Científicas, C/ Serrano, 144, 28006, Madrid, Spain |