Entity-Balanced Gaussian pLSA: Vanilla Gaussian pLSA may not always lead to a good clustering for comparison since the expression above does not involve any term to balance the entity-information in clusters, as motivated earlier.
we incorporate a regularizer term to have a good balance (proportion) of entities in each cluster (see Figure 2 (right) (c)) resulting in our final model for comparison called Entity-Balanced Gaussian pLSA (EB G-pLSA).