Table 13.

Comparison of the results of the different approaches.

Characteristics		Approaches
		AP.1	AP.2	AP.3	DC-IEC104
Security		√	√	√	×
Scalability		√	√	√	×
Maintenance		√	√	√	×
Spring (10 °C~25 °C)	Number of data	50	50	50	50
	Precision	90.17%	89.94%	90.11%	91.29%
	Error rate	2.52%	4.76%	4.34%	2.21%
	Processing time	1.371 s	0.988 s	2.336 s	1.083 s
	Remark	Regular	Regular	Regular	Regular
Summer (26 °C~31 °C)	Number of data	50	50	50	50
	Precision	90.17%	89.94%	90.11%	88.73%
	Error rate	2.52%	4.76%	4.34%	4.33%
	Processing time	1.371 s	0.988 s	2.336 s	1.174 s
	Remark	Regular	Regular	Regular	Regular
Autumn (16 °C~24 °C)	Number of data	50	50	50	50
	Precision	90.17%	89.94%	90.11%	91.29%
	Error rate	2.52%	4.76%	4.34%	2.21%
	Processing time	1.371 s	0.988 s	2.336 s	1.083 s
	Remark	Regular	Regular	Regular	Regular
Winter (−4 °C~11 °C)	Number of data	50	50	50	50
	Precision	90.17%	89.94%	90.11%	91.29%
	Error rate	2.52%	4.76%	4.34%	2.21%
	Processing time	1.371 s	0.988 s	2.336 s	1.083 s
	Remark	Regular	Regular	Regular	Regular

°C = Degree Celsius.