| zFunction | Mathematical Forms | Derivatives |
| BPR |
|
|
| Conical |
where, |
|
| Modified Davidson |
|
|
| Akcelik |
|
|
| zFunction | Mathematical Forms | Derivatives |
| BPR |
|
|
| Conical |
where, |
|
| Modified Davidson |
|
|
| Akcelik |
|
|
and 
