“…We refer to [3,4,5,9,10,14,22,24,26,49] for the concepts and some of the existing results in the theory of nonautonomous dynamical systems, especially on the topics of pullback attractors and pullback exponential attractors. Recall that these concepts are rooted in the theory of global attractors and other invariant attracting sets for the autonomous infinite-dimensional dynamical systems [7,28,32,35,40,44,45,46] and the theory of exponential attractors or sometimes called inertial sets [12,13,25,28,43].…”