Table 2.

Feature comparison of alternative approaches.

Studies	A1	A2	A3	A4	A5	A6
Bastian et al. (2014)	√
Yang (2017)						√
Yazdian et al. (2017)					√
Wang and Gao (2017)			√
Lai et al. (2018)	√
Nepomuceno et al. (2020)						√
Our study	√	√	√	√	√	√