A Multichannel Biomedical Named Entity Recognition Model Based on Multitask Learning and Contextualized Word Representations

Table 3

Performance comparison of the different merge methods.

Merge methods	JNLPBA			NCBI-disease
	Precision	Recall	F1-score	Precision	Recall	F1-score
Addition	72.9	78.8	75.7	87.4	88.6	88.0
Connection	71.1	78.3	74.5	85.3	89.2	87.2
Unit-level attention	72.6	79.6	76.0	88.2	89.2	88.7
Channel-level attention	72.1	78.6	75.2	86.6	88.7	87.6