[Retracted] A Self-Diagnostic Method for Automobile Faults in Multiple Working Conditions Based on SOM-BPNN

Table 2

Example of data after normalization.

O2	−0.42	−0.79	−0.46	−0.78	−0.80	−0.38	−0.78	−0.57
CO2	0.53	0.67	0.67	0.84	0.58	0.81	0.52	0.57
NOx	−0.89	−0.32	−0.83	−0.76	−0.91	−0.79	−0.56	−0.83
CO	−0.74	−0.72	−0.60	−0.76	−0.46	−0.42	−0.42	−0.62
HC	−0.69	−0.71	−0.80	−0.74	−0.90	−0.87	−0.84	−0.68
λ	−0.50	0.30	0.50	−0.30	0.30	0.10	0.80	−0.60