| Hit Ratio |
Hit Ratio = (# of hit features/# of features) × 100% |
| NDCG |
NDCG = G/Ideal G; G = Σ (2 scorei/log2 (i + 1)) |
| PMI-Scores |
PMI-Score(k) = (1/T(T − 1)) Σ1 ≤ i < j ≤ T log (P(wi, wj)/(P(wi) * P(wj))) Here, P(wi), P(wj), and P(wi, wj) represent the probabilities of word wi, wj, and the co-occurring word-pair (wi, wj) respectively. |
| Dis score |
Dis_Score = (Σk = 1K ((Σj = 1k Djs(ϕk∥ϕj*))/k))/K; |
| Djs(ϕk∥ϕj*) = 1/2 DKL(ϕk∥M) + 1/2 DKL(ϕj∥M); |
| DKL(P∥Q) = Σi P(i) log (P(i)/Q(i)); M = 1/2 (ϕk + ϕj); |
| Precision, Recall, F-Measure, and Accuracy |
Precision = TP/(TP + FP) |
| Recall = TP/(TP + FN) |
| F-Measure = (2 × Precision × Recall)/(Precision + Recall) |
| Accuracy = (TP + TN)/(TP + TN + FP + FN) |
