[6] Ni Xiaojun, Gole A M, Zhao Chengyong, et al. An improved measure of ac system strength for performance analysis of multi-infeed HVdc systems including VSC and LCC converters[J]. IEEE Transactions on Power Delivery, 2018, 33(1): 169-178.

[7] KUMAR R, VERMA B K, RASTOGI S S. Social popularity based SVD + + recommender system[J]. International Journal of Computer Applications, 2014, 87(14): 33-37.

[12] Wang Z, Lam H K, Xiao B, et al. Event-triggered prescribedtime fuzzy control for space teleoperation systems subject to multiple constraints and uncertainties[J]. IEEE Transactions on Fuzzy Systems, 2020, 29(9): 2785-2797