Table 2 Variable symbols and annotations.
From: Collaborative optimization of truck scheduling in container terminals using graph theory and DDQN
Symbol | Annotation |
|---|---|
\(\:{t}_{cq}\) | The time taken by the quay crane to complete a container task \(\:c\) |
\(\:{t}_{c{c}^{{\prime\:}}q}^{s}\) | The preparation time for the quay crane \(\:q\:\)to transition to the next container handling task \(\:{c}^{{\prime\:}\:}\)after completing the current task \(\:c\) |
\(\:{t}_{cj}\) | The time taken by the yard truck \(\:j\) to complete a container handling task \(\:c\) |
\(\:{t}_{c{c}^{{\prime\:}}j}^{s}\) | The empty travel time for the yard truck \(\:j\) to reach the next container handling task \(\:{c}^{{\prime\:}}\:\)after completing the current task \(\:c\) |
\(\:{t}_{cy}\) | The time taken by the yard crane \(\:y\) to complete a container handling task \(\:c\) |
\(\:{t}_{c{c}^{{\prime\:}}y}^{s}\) | The preparation time for the yard crane \(\:y\) to switch to the next container handling task \(\:{c}^{{\prime\:}}\) after completing the current task \(\:c\) |
