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

Table 6

The quality of the LDA model with different topic numbers based on the 20NewsGroup.

Evaluation indicators	Quality evaluation of LDA model under different topic numbers
	10	15	17	18	19	20	21	22	23	25	30
PERP	370.954	371.873	371.562	371.723	372.899	370.068	371.960	377.523	389.457	388.428	395.543
	0.498	0.557	0.591	0.577	0.595	0.621	0.585	0.608	0.586	0.576	0.583