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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.