A New Biomedical Passage Retrieval Framework for Laboratory Medicine: Leveraging Domain-specific Ontology, Multilevel PRF, and Negation Differential Weighting

Table 7

nDCG results of the methods.

Method	nDCG@1		nDCG@5		nDCG@10
Baseline	0.6211	—	0.3738	—	0.2878	—
UMLSE	0.7001	+12.72%	0.4038	+8.0%	0.3118	+8.3%
LPRF	0.7444	+6.3%	0.4059	+0.5%	0.3235	+3.7%
GPRF	0.8444	+13.4%	0.4681	+15.3%	0.3563	+10.14%
GPRF-NEG	0.8778	+3.9%	0.5184	+10.7%	0.3916	+9.9%

A significant improvement () over the baseline. A significant improvement over baseline and methods marked with .