For each target anchor
-
$Z$ $t$ $i$ represents the flattened representation of the target anchor obtained from encoder + projection network. -
$τ$ is the temperature hyper-parameter -
$P$ $s$ ($\hat{y}$ $t$ $i$ ) is the set of positive samples, i.e. samples from source domain with same label as the pseudo label of target anchor. -
$Z$ $s$ $p$ reppresents the flattened representation of a positive sample from source domain obtained from encoder + projection network -
$I$ $s$ is the set of all samples whether positive or negative in the mini-batch. -
The encircled formula shown below represents the Cosine-Similarity between the flattened vectors in both numerator and denominator.
