**Author details**

Xiaolong Yang1,2

1 Shanghai Astronomical Observatory, Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Shanghai, China

2 Shanghai Astronomical Observatory, Shanghai Key Laboratory of Space Navigation and Positioning Techniques, Chinese Academy of Sciences, Shanghai, China

\*Address all correspondence to: yangxl@shao.ac.cn

© 2022 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*The Unified Models for Black Hole Accretions DOI: http://dx.doi.org/10.5772/intechopen.105416*
