Application of Improved Grey Model in Photocatalytic Data Prediction

Luping WANG; Zhanhui LU; Xin WEI; Ming FANG; Xiangke WANG

doi:10.15541/jim20200661

Journals >Journal of Inorganic Materials >Volume 36 >Issue 8 >Page 871 > Article

Journal of Inorganic Materials
Vol. 36, Issue 8, 871 (2021)

Application of Improved Grey Model in Photocatalytic Data Prediction

Luping WANG¹, Zhanhui LU^1,*, Xin WEI², Ming FANG³, and Xiangke WANG^3,*

Author Affiliations

¹1. School of Mathematics and Physics, North China Electric Power University, Beijing 102206, China

²2. College of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China

³3. MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China

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DOI: 10.15541/jim20200661 Cite this Article

Luping WANG, Zhanhui LU, Xin WEI, Ming FANG, Xiangke WANG. Application of Improved Grey Model in Photocatalytic Data Prediction[J]. Journal of Inorganic Materials, 2021, 36(8): 871 Copy Citation Text

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1. Modelling steps of EDGM(1, 1, α)

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2. XRD pattern of Bi/BiOCl/Au

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3. Simulating results of tetracycline concentration from (a) DGM(1, 1), (b) DGM(1, 1, α), (c) EDGM(1, 1), and (d) EDGM(1, 1, α) models

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4. Simulated epsilon of tetracycline concentration from DGM(1, 1), DGM(1, 1, α), EDGM(1, 1), and EDGM(1, 1, α) models

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Time/min	0	15	30	45	60	75	90	105	120	135
Con./(mg·L^-1)	38.66	34.52	31.39	29.10	27.00	25.15	23.16	21.24	19.40	18.29

Table 1. Experimental data of tetracycline concentration

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Date size	Experimental data/(mg·L^-1)		Forecast data /(mg·L^-1)		MRE
4	27.00	25.15	26.93	24.89	0.005
5	25.15	23.16	25.13	23.42	0.006
6	23.16	21.24	23.50	21.98	0.025
7	21.24	19.40	21.46	19.84	0.017
8	19.40	18.29	19.56	17.97	0.025

Table 2. Different data size forecast comparison

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Time /min	Con. /(mg·L^-1)	DGM (1, 1)	DGM (1, 1, α)	EDGM (1, 1)	EDGM (1, 1, α)
60	27.00	26.60	26.93	26.60	26.93
75	25.15	24.41	25.07	24.57	24.89
90	23.16	22.40	23.41	22.52	22.98
105	21.24	20.55	21.92	20.75	21.20
120	19.40	18.86	20.56	19.05	19.56
135	18.29	17.31	19.32	17.54	18.03

Table 3. Predicted values of DGM(1, 1), DGM(1, 1, α), EDGM(1, 1), and EDGM(1, 1, α) models

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Model	MRE	FD
DGM(1, 1)	0.032	0.984
DGM(1, 1, α)	0.028	0.985
EDGM(1, 1)	0.025	0.988
EDGM(1, 1, α)	0.008	0.995

Table 4. The MRE and FD of DGM(1, 1), DGM(1, 1, α), EDGM(1, 1), and EDGM(1, 1, α) models

Luping WANG, Zhanhui LU, Xin WEI, Ming FANG, Xiangke WANG. Application of Improved Grey Model in Photocatalytic Data Prediction[J]. Journal of Inorganic Materials, 2021, 36(8): 871

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