Short-Time Fourier Transform and Decision Tree-Based Pattern Recognition for Gas Identification Using Temperature Modulated Microhotplate Gas Sensors

Table 2

The recognition accuracy for the rectangle waveform (decision tree classifier and 12-fold cross-validation are applied to the identification of gases) (%).

Frequency selected (mHz)	Feature selected	Window function
		Boxcar	Triangle	Blackman	Taylor	Tukey	Hann	Hamming	Gaussian
0.97		96.88	96.88	94.79	93.75	96.88	94.79	90.63	95.83
1.94		97.92	93.75	95.83	96.88	97.92	92.71	95.83	96.88
2.91		97.92	95.83	95.83	97.92	97.92	94.79	97.92	94.79
3.88		95.83	97.92	88.54	97.92	96.88	90.63	96.88	93.75
4.85		94.79	95.83	92.71	97.92	92.71	98.96	94.79	96.88
5.82		93.75	95.83	98.96	100	95.83	97.92	100	96.88
6.79		92.71	94.79	97.92	92.71	91.67	96.88	90.63	96.88
7.76		96.88	85.42	100	92.71	86.46	89.58	94.79	96.88
8.73		83.33	86.46	95.83	84.38	87.5	95.83	85.42	94.79
9.7		87.5	90.63	91.67	84.38	81.25	86.46	94.79	88.54
10.67		79.17	90.63	88.54	76.04	84.38	84.38	87.5	84.38