Table 13 Model coefficients between the first and the second hidden layers.

From: Machine learning prediction of methane, nitrogen, and natural gas mixture viscosities under normal and harsh conditions

W1

W2

W3

W4

W5

W6

W7

W8

W9

W10

b

− 0.88253

1.8382

− 1.3036

− 2.5301

2.1458

6.7651

3.3736

− 4.2357

− 10.9149

1.2957

1.1044

− 4.519

− 3.3167

− 1.8767

0.77471

0.078324

− 4.3585

1.3972

− 0.94983

5.3246

− 3.1295

6.4301

3.2164

− 2.2709

21.2044

0.34493

− 1.7776

4.5619

1.8436

− 19.9233

6.6582

− 12.3119

− 5.9605

2.3312

− 3.2796

5.6372

− 3.5157

1.6309

− 6.8675

− 1.6736

7.0359

1.9375

11.7241

− 7.7165

2.7793

− 2.3727

− 1.5271

− 1.9545

1.6769

3.3274

3.5357

5.4488

− 3.8658

− 7.6838

− 0.23225

2.2131

2.2295

0.091128

0.51019

3.8452

− 1.5995

− 1.552

− 3.3308

0.26275

2.381

− 3.0239

2.6254

1.8697

− 1.8305

3.4868

0.33837

− 3.4281

2.455

− 0.29006

− 3.2851

− 0.58462

− 3.3005

− 1.6344

− 1.7562

5.1133

1.2104

− 3.1481

− 7.2707

− 0.47054

7.166

0.44856

10.604

− 5.4499

4.0064

2.6696

1.4004

− 0.29366

− 0.59161

3.5769

− 0.12439

− 1.8023

1.5135

− 14.208

6.3726

− 3.0234

− 4.2309

0.43802

− 0.68803

− 3.3328

0.76091

0.5076

− 1.3548

− 0.11573

− 1.4784

0.527

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