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Table 3 Comparisons between the estimated and experimental values.

From: Effective Prediction of Thermal Conductivity of Concrete Using Neural Network Method

Researchers

Data no.

Concrete thermal conductivity (W/m K)

Measured

Estimated by the target 0.01 network

Estimated by the target 0.005 network

Harmathy (1983)

1

0.3

0.4 (0.1)

0.3 (0.0)

2

0.7

0.8 (0.1)

0.8 (0.1)

3

0.9

1.0 (0.1)

0.9 (0.1)

4

1.2

1.2 (0.0)

1.1 (0.0)

5

1.3

1.5 (0.2)

1.4 (0.1)

6

1.5

1.4 (0.1)

1.3 (0.1)

Yamazaki et al. (1995)

7

1.0

1.0 (0.1)

1.1 (0.1)

8

1.3

1.3 (0.0)

1.3 (0.0)

Khan et al. (1998)

9

1.6

1.7 (0.1)

1.7 (0.1)

10

1.8

1.8 (0.0)

1.7 (0.1)

Lie and Kodur (1996)

11

1.0

1.1 (0.1)

1.0 (0.0)

12

1.2

1.3 (0.1)

1.2 (0.0)

Van Geem et al. (1997)

13

1.8

1.9 (0.1)

1.9 (0.1)

14

1.9

1.8 (0.1)

1.9 (0.0)

15

2.0

1.9 (0.1)

2.0 (0.0)

16

2.1

2.2 (0.1)

2.1 (0.0)

Kodur and Sultan (2003)

17

1.4

1.5 (0.1)

1.5 (0.1)

18

1.6

1.7 (0.1)

1.7 (0.1)

Kim et al. (2003)

19

1.0

0.9 (0.1)

0.9 (0.1)

20

1.3

1.2 (0.1)

1.2 (0.1)

21

1.3

1.3 (0.0)

1.2 (0.1)

22

1.4

1.4 (0.0)

1.5 (0.1)

23

1.7

1.7 (0.0)

1.7 (0.0)

24

1.8

1.9 (0.1)

1.8 (0.0)

25

1.8

1.7 (0.1)

1.9 (0.1)

26

2.2

2.2 (0.0)

2.2 (0.0)

27

2.3

2.3 (0.0)

2.4 (0.1)

28

2.4

2.4 (0.0)

2.4 (0.0)

  1. The values in parenthesis present the differences between the measured and estimated thermal conductivity.