Department of Mathematics and Physics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Institute of Applied Physics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
China Institute of Atomic Energy PO Box 275(10) Beijing 102413 China;
Department of Mathematics and Physics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Institute of Applied Physics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Department of Mathematics and Physics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Institute of Applied Physics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
China Institute of Atomic Energy PO Box 275(10) Beijing 102413 China;
