A Deep Transfer NOx Emission Inversion Model of Diesel Vehicles with Multisource External Influence

Table 3

Descriptive statistics of the target domain.

	Count	Mean	Std	Min	Max
Engine speed	5229	1182.85	269.88	534.0	1997.0
Actual output torque percentage	5229	26.47	24.89	0	99.0
Water temperature of engine	5229	75.01	0.79	73.0	78.0
Oil temperature of engine	5229	72.41	3.49	35.0	77.0
After-treatment downstream value	5229	387.85	288.98	0	1769.0
After-treatment downstream oxygen percentage	5229	13.27	3.37	2.0	21.0
Environmental temperature	5229	29.64	1.48	26.0	32.0
After-treatment waste mass flow rate	5229	464.85	177.72	171.0	1142.0
Urea tank level percentage	5229	56.89	2.25	35.0	82.0
Temperature of urea tank	5229	30.01	0.88	29.0	31.0
Vehicle speed	5229	37.56	19.45	0	80.0
Gas pedal opening	5229	24.38	23.67	0	100.0