Table 1.

Comparison of compensation results of the three methods.

Constant Temperature		−40 °C	20 °C	60 °C
Before Compensation σ(°/h) (×10−3)		7.218	6.796	7.194
After Compensation σ(°/h) (×10−4)	MLR	13.953	13.953	13.954
	RBFNN	8.93	8.944	8.93
	Modified RBFNN	6.918	6.922	6.926
$\mathbf{\text{Accuracy Improvement}}\left(\frac{\text{Before compensation}}{\text{After compensation}}\right)$	MLR	5.17	4.87	5.15
	RBFNN	8.08	7.60	8.05
	Modified RBFNN	10.43	9.82	10.39
Running Time (s)	MLR	—	—	—
	RBFNN	140.8	142.4	141.3
	Modified RBFNN	79.5	82.6	81.7
Variable Temperature		1 °C/min	3 °C/min	5 °C/min
Before Compensation σ(°/h) (×10−3)		6.804	6.804	6.806
After Compensation σ(°/h) (×10−4)	MLR	14.276	14.180	14.122
	RBFNN	8.916	8.928	8.944
	Modified RBFNN	6.930	6.922	6.912
$\mathbf{\text{Accuracy Improvement}}\left(\frac{\text{Before compensation}}{\text{After compensation}}\right)$	MLR	4.77	4.80	4.82
	RBFNN	7.63	7.62	7.61
	Modified RBFNN	9.818	9.832	9.847
Running Time (s)	MLR	—	—	—
	RBFNN	141.6	140.2	139.8
	Modified RBFNN	80.4	82.6	80.3