Ontology-Based Noise Source Identification and Key Feature Selection: A Case Study on Tractor Cab

Table 5

Ontology reasoning results.

	Engine				Cab				Air filter	Muffler	Back panel
	1	2	3	4	5	6	7	8
700 rpm
Ignition frequency
Peak frequency	✓				✓		✓				✓
Correlation coefficients	Level 1				Level 1						Level 2
2400 rpm
Ignition frequency	✓
Peak frequency	✓	✓			✓						✓
Correlation coefficients	Level 1				Level 1						Level 3

Note: “✓” represents cases where outputs of ontology reasoning results are obtained, and the blank spaces indicate that no output is obtained.