“…From the proof of Theorem 3.1, similar to [27], and by Hölder, Young inequalities, we can have By Lemma 3.2, 3.3, from [9], there holds is the contractive function for each fixed T . Further, similar the results in [9,14], we can easily get that φ t T in (4.15) is a contractive function, so ψ t T is asymptotic contractive function, then from (4.15) we know that the process U (t, τ ) is asymptotic contractive process on the whole time-dependent space. The proof is completed.…”