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

Table 2

Descriptive statistics of the source domain.

	Count	Mean	Std	Min	Max
Engine speed	5229	1194.87	297.60	0	2095.0
Actual output torque percentage	5229	23.64	21.16	0	99.0
Water temperature of engine	5229	78.10	3.59	67.0	88.0
Oil temperature of engine	5229	86.69	4.17	69.0	97.0
After-treatment downstream value	5229	997.92	820.01	0	3076.0
After-treatment downstream oxygen percentage	5229	13.69	4.76	0	21.0
Environmental temperature	5229	29.90	1.37	26.0	32.0
After-treatment waste mass flow rate	5229	443.13	149.48	0	1008
Urea tank level percentage	5229	90.99	1.98	82.0	100.0
Temperature of urea tank	5229	30.31	0.52	29.0	32.0
Vehicle speed	5229	35.41	18.42	0	59.0
Gas pedal opening	5229	19.19	19.36	0	100.0