lda × 61
optimization × 56
regression × 39
sampling × 32
references × 27
state-of-the-art × 15
modeling × 13
mixture × 9
hyperparameters × 8
model-selection × 8
crossvalidation × 7
weka × 7
gaussian × 6
validation-data × 3
partitioning × 2
tuning × 2
held-out-data × 1
objective × 1
topic-number × 1