A Topic Recognition Method of News Text Based on Word Embedding Enhancement

Table 7

The quality of the LDA model with different topic numbers based on BBC News.

Evaluation indicators	Quality evaluation of LDA model under different topic numbers
	5	10	15	20	25	30	35	40	45	50	55
PERP	246.258	247.429	249.625	245.917	249.677	255.310	256.739	254.678	259.439	265.335	261.736
	0.448	0.495	0.478	0.522	0.454	0.445	0.471	0.462	0.469	0.442	0.462

For the above experimental values, we mark the best three results under different evaluation indicators.