“…Systems are often subjected to random perturbations. Stochastic differential equations have been investigated by many authors due to playing a very important role in formulation and analysis of many phenomena in economic and finance, physics, mechanics, electric and control engineering, see, for example, Da Prato and Zabczyk [5], Liu [15], Luo and Liu [17], Jahanipur [8], and references therein. Subsequently, with the help of semigroup theory and fractional calculus technique, some authors have also considered fractional stochastic differential equations driven by Brownian motion.…”