The Method for Identifying Employees’ Emotions in Adverse States Incorporating PSO-kNN Algorithm and Multiple Physiological Parameters

Table 4

The classification of three tension degrees by physiological signals and their features’ combination.

Physiological signals	Number of original features	Optimal subset feature number		Average recognition rate (%)
		Not to baseline kNN	Go to baseline kNN	Not to baseline kNN	Go to baseline kNN
BP	3	1	2	33.33	41.67
HR	6	3	2	58.33	66.67
RR	6	2	1	58.33	58.33
PR	6	3	2	50.00	58.33
SpO2	6	1	1	33.33	33.33
SC	6	3	2	50.00	66.67
ALL	33	6	5	75.00	83.33