Open Access
Table 1
Notations used in the mathematical model
| Notation | Description |
|---|---|
|
Number of facilities. |
|
Set of facilities,  . |
|
Material flow between facilities  and  . |
|
Length of facility  ( ) (parallel to the  -axis). |
|
Total length of facilities,  . |
|
A reference facility. It can be any facility in  . |
We select the facility with the largest length as the reference facility  , |
|
i.e.  . |
|
|
An arbitrarily large positive number. We set  to  . |
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