黑洞双星、伽玛暴、活动星系核、黑洞潮汐瓦解事件等天体中存在许多共性物理过程和相似观测现象，对这些相似现象进行统一研究有利于理解一些共性物理过程，并相互借鉴和利用。本项目包含上述不同领域成员，期望通过协同合作与交叉研究，探讨一些共性问题，具体如下：1）研究伽玛暴、黑洞双星爆发初始阶段、黑洞潮汐瓦解事件等暂现源中‘快速’吸积阶段大尺度磁场的带入、维持以及吸积盘演化过程和喷流形成机制；2）利用亚毫米波和厘米波观测阵高分辨率观测结果，研究超大质量黑洞天体喷流形成形成与加速过程（如M87等近邻射电星系）以及pc尺度喷流的能量耗散机制（如blazar），从而协助理解伽玛暴中的喷流加速和能量耗散等物理过程；3）寻找黑洞沙漠中的中等质量黑洞候选体，探讨其中心引擎活动性质，研究宇宙早期种子黑洞、近邻星系中可能的中等质量黑洞引力波特性和电磁信号，为未来空间引力波计划开展科学目标预研究。

There are many similar phenomena (e.g., flares,variability properties, wind/jetetc.) in astronomical compact objects at different scales (e.g., black-hole binary-XRB, ultraluminous object-ULX, gamma-ray burst-GRB, and active galactic nuclear-AGN, etc.). It will be very helpful if we universally study these similar phenomena in these objects, which will improve our understanding some similar basic physics behind the similar observational features. This project include the researchers at different topics (e.g., AGNs, GRB, XRBs), which will greatly improve us to understand the similar phenomena at different scales by collaborations. We will focus on the following subprojects: 1) The properties of accretion process and jet formation in the fast-accretion phase of black-hole systems (outbursts of XRB, GRBs, tidal disruption event-TDE etc.), where we will particularly focus on the evolution of large-scale magnetic field during the fast accretion (e.g., radial velocity is large); 2) to explore the accretion and jet physics through the near-future high-resolution submm VLBI observations (e.g., event horizon telescope), and apply the contrained jet physics from some nearby radio galaxies (e.g., M87, jet formation, acceleration and dissipation) to understand the jet physics in GRBs and blazars; 3) to search the possible candidate of the intermediate black holes (IMBHs, e.g., TDE, globular cluster,), and explore the physics of their high-energy activities and investigate the possible gravitational-wave radiation from the binary IMBHs or extreme mass ratio inspiral systems (IMBH&WD or IMBH&NS etc.), which is prepared for the Chinese Space gravitational-wave project (TianQin and TaiJi).