School of Electronic Engineering, Xidian University, Xi'an 710071;
School of Electronic Engineering, Xidian University, Xi'an 710071;
zhhxie@mail.xidian.edu.cn2 National Time Service Center, Chinese Academy of Sciences, Xi'an 710600;
School of Electronic Engineering, Xidian University, Xi'an 710071;
pulsars: general-stars: magnetic fields-stars: fundamental parameters (classification);