Missing Data Reconstruction Based on Spectral k-Support Norm Minimization for NB-IoT Data

Table 3

Performance evaluation for four methods by average MAPE and RMSE on the COD and total nitrogen datasets (unit: mg/L) with SMP.

Data type	Missing gap	DRAWNNM		HaLRTC		ADMAR		Proposed method
		MAPE	RMSE	MAPE	RMSE	MAPE	RMSE	MAPE	RMSE
COD	One-hour	15.704	27.360	17.693	26.030	16.942	19.660	15.067	23.140
	Three-hour	32.439	93.060	33.641	83.780	32.380	92.730	30.290	70.570
	Six-hour	72.110	139.570	89.820	141.330	99.550	147.910	64.980	137.640
	Nine-hour	131.983	265.522	126.638	253.591	131.628	280.032	119.190	245.730
Total nitrogen	One-hour	23.589	29.452	25.159	32.021	24.929	37.230	23.976	33.381
	Three-hour	45.178	96.271	48.627	93.737	46.680	94.560	40.221	89.321
	Six-hour	82.275	169.601	86.921	163.260	90.172	177.290	84.217	157.290
	Nine-hour	156.210	274.289	147.210	283.240	158.258	288.126	149.274	265.216