School of Physics;
Huazhong University of Science and Technology;
Wuhan 430074;
China;
School of Physics and Electronic Science;
Guizhou Normal University;
Guiyang 550001;
China;
Shanghai Astronomical Observatory;
Chinese Academy of Science;
Shanghai 200030;
China;
Max-Planck-Institut fuir Radioastronomie;
Auf dem Higel 69;
D-53121 Bonn;
Germany;
School of Mathematics;
Physics and Statistics;
Shanghai University of Engineering Science;
Shanghai 201620;
China;
black hole physics; galaxies:jets; radiation mechanisms:non-thermal; galaxies:magnetic fields; radio continuum:galaxies;