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

Table 1

Example of data before normalization.

O2	2.06	0.88	1.94	0.91	0.85	2.18	0.91	1.57
CO2	12.73	13.71	13.69	14.87	13.06	14.66	12.61	13.01
NOx	51.79	185.93	65.75	82.29	47.3	75.33	130.09	65.62
CO	1.28	1.39	1.99	1.19	2.67	2.9	2.9	1.9
HC	78.4	73.8	50.67	64.99	24.78	33.39	39.79	79.83
λ	0.95	1.03	1.05	0.97	1.03	1.01	1.08	0.94