CCCAP-Pre: Predicting Price of Artwork Based on GM(1, N, x⁽¹⁾) Model and Cultural Services

Table 2

The optimal parameter values of two GM(1, N, x⁽¹⁾) price prediction models.

Model	The optimal parameter values of GM(1, N, x(1)) price prediction model
Ceramic sculpture artwork	= −2.9925	= 5.3613	= 0.6388	= 23.5656	= −0.3090	= 2.0137
	= 0.1240	= 6.6514	= 1.0892	= 3.4024	= 1.2799	= 20.7599
	= 1.4905	= 20.7671	= 1.1095	= 2.0181	= −0.6439	= 4.0001
	= 0.9636	= 20.5602	= 0.8757	= 9.1464	= −1.3809	= 21.9981
	= −1.4880	= 5.8109	= −0.2489	= 10.9471	= −1.8555	= 7.4743
	= 1.3632	= 2.6448	= 2.1389	= 4.6381	= −0.1881	= 10.4581
	= 1.9476	= 17.0286	= 1.2168
Ceramic painting artwork	= −0.2730	= 20.5439	= −0.2697	= 9.3959	= 1.7723	= 16.8501
	= 0.6414	= 13.0020	= 1.8596	= 16.6395	= −0.1034	= 18.3659
	= 0.3540	= 7.1028	= −0.8060	= 18.0570	= 1.5097	= 0.5258
	= −1.1670	= 20.8207	= 1.0153	= 9.4670	= 0.8355	= 11.8334
	= 1.5395	= 15.4672	= 1.9055	= 23.9189	= −0.6739	= 12.1785
	= −0.1268	= 7.7067	= 1.6970	= 19.8455	= −0.6512	= 9.7430