| Schemes | SF1 | SF2 | SF3 | SF4 | SF5 | SF6 | SF7 |
| Boahen et al. [32] | X | X |
|
|
|
|
|
| Zhong et al. [33] | X |
|
|
|
| X | X |
| Boahen et al. [34] | X |
|
|
| X |
|
|
| Li et al. [12] |
| X | X |
|
| X |
|
| Proposed model |
|
|
|
|
|
|
|