Table 4 Results of multiple linear regression analysis.

From: Optimization of oxygen transfer and power consumption in aerobic bioprocess by designing disc turbine impeller based on CFD-Taguchi method

 

\({ k}_{L}a\)

Constant

A

B

C

Non-normalized coefficient

B

0.02

–0.044

0.029

–0.013

Standard error

0.002

0.01

0.01

0.003

Normalization coefficient

Beta

–

–0.636

0.414

–0.567

t

12.081

–4.443

2.888

–3.957

P

0.000***

0.007***

0.034**

0.011**

VIF

–

1

1

1

R2

0.897

Adjusted R2

0.836

F

F = 14.578 P = 0.007***

 

\(P/V\)

Constant

A

B

C

Non-normalized coefficient

B

248.009

–731.511

230.642

–340.958

Standard error

17.18

104.599

104.599

34.866

Normalization coefficient

Beta

–

–0.563

0.177

–0.787

t

14.436

–6.993

2.205

–9.779

P

0.000***

0.001***

0.079*

0.000***

VIF

–

1

1

1

R2

0.968

Adjusted R2

0.948

F

F = 49.799 P = 0.000***

  1. Note: * * *, * * and * represent significance levels of 1%, 5% and 10%, respectively. A, B and C representative coefficient a, asymmetry and radial bending angle, and all of them were normalized.
Back to article page