“…For an unstable system, various strategies have been introduced to stabilize it, such as sample control, impulse control, pinning control, feedback control, and intermittent control. Generally speaking, for stochastic differential systems, the feedback control can be divided into one in the drift part and one in the diffusion part, e.g., [12][13][14][15][16]. Here, the feedback control in the drift part is particularly noted for this paper.…”