Department of Astronomy;
School of Physics;
Huazhong University of Science and Technology;
Wuhan 430074;
China;
CAS Key Laboratory for Research in Galaxies and Cosmology;
Department of Astronomy;
University of Science and Technology of China;
Hefei 230026;
China;
School of Astronomy and Space Science;
University of Science and Technology of China;
Hefei 230026;
China;
Department of Space;
Earth and Environment;
Chalmers University of Technology;
Onsala Space Observatory;
SE-43992 Onsala;
Sweden;
Department of Physics and Astronomy;
4129 Frederick Reines Hall;
University of California;
Irvine;
CA;
92697-4575;
USA;
galaxies:active; galaxies:Seyfert; quasars:emission lines; accretion; accretion disks;