Table 15 The computational results of the recovered cases of COVID-19 of China.

From: A new grey quadratic polynomial model and its application in the COVID-19 in China

date

data

GM(1,1)

DGM(1,1)

NGM(1,1,k,c)

GVM(1,1)

PR(2)

GMQP(1,1)

01/23/2020

34

34.0000

34.0000

34.0000

34.0000

103.0464

34.0000

01/24/2020

38

26.2967

26.5439

23.0438

13.5607

49.7041

44.3017

01/25/2020

49

35.8201

36.2471

32.2317

18.9614

17.6929

44.9811

01/26/2020

51

48.7923

49.4974

44.7177

26.5053

7.0126

51.2829

01/27/2020

60

66.4624

67.5913

61.6854

37.0357

17.6635

64.8046

01/28/2020

103

90.5316

92.2996

84.7437

51.7208

49.6453

87.5974

01/29/2020

124

123.3176

126.0400

116.0788

72.1723

102.9582

122.2954

01/30/2020

171

167.9769

172.1143

158.6615

100.6009

177.6022

172.2811

01/31/2020

243

228.8096

235.0313

216.5292

140.0143

273.5772

241.8978

02/01/2020

328

311.6728

320.9477

295.1684

194.4569

390.8832

336.7231

02/02/2020

475

424.5448

438.2711

402.0350

269.2765

529.5203

463.9190

02/03/2020

632

578.2933

598.4826

547.2611

371.3702

689.4885

632.6827

02/04/2020

892

787.7216

817.2598

744.6160

509.3095

870.7876

854.8239

02/05/2020

1153

1072.9942

1116.0117

1012.8110

693.1414

1073.4179

1145.5082

02/06/2020

1540

1461.5780

1523.9734

1377.2742

933.5335

1297.3791

1524.2097

02/07/2020

2050

1990.8871

2081.0667

1872.5608

1239.7818

1542.6714

2015.9351

02/08/2021

2649

2711.8848

2841.8073

2545.6297

1616.1719

1809.2948

2652.7965