Alternate Low-Rank Matrix Approximation in Latent Semantic Analysis

Table 5

The accuracy of the returned documents by the SVD and the TULVD for the TIME collection.

k	SVD			TULVD
	Min Cosine Similarity	Precision (10%)	Precision (50%)	Min Cosine Similarity	Precision (10%)	Precision (50%)
5	0.6290	30.4	13.2	0.70	31.3	12.4
10	0.4840	49.1	17.0	0.56	44.4	15.5
20	0.2140	58.9	17.4	0.51	49.8	16.1
50	0.1001	59.7	18.5	0.17	59.6	34.7
100	0.1013	70.8	22.8	0.09	65.8	35.2
150	0.1009	72.6	25.1	0.06	73.4	38.3
200	0.1004	75.6	33.1	0.03	74.1	40.8
300	0.1026	73.5	40.9	0.02	63.1	44.8
400	0.0823	72.8	47.1	0.02	63.1	46.1
423	0.0812	68.8	45.1	0.01	56.7	32.4