Figure 7
The figure contains six graphs and is labeled from Part (a) to (f). All graphs share the same axis structure: the horizontal axis is labeled “Data sample” and ranges from 0 to 100 in increments of 50 units, while the vertical axis is labeled “Thermal Conductivity (watts per (meter kelvin))” and ranges from negative 0.5 to 2.0 in increments of 0.5. Each graph contains a legend indicating three elements: magenta bars representing “Error-train”, a black line representing “Predicted-train”, and a red line representing “Observed-train”. Part (a) is titled “G P R”. The red line (observed) starts at 1,0 at 0 samples, closely tracked by the black line (predicted). Both lines oscillate between 0.0 and 1.2 across all data samples, reaching the peak at 1.2 at 86 samples. The lines end at approximately 0.03 near sample 100. Magenta bars appear at various points below the zero line, varying between 0.12 and negative 0.17 throughout. The lowest point reaches negative 0.17 at 33 samples. Part (b) is titled “E T”. The red and blue lines both start at 1.0 at 0 samples and track each other closely. Both lines oscillate between 0.0 and 1.2, reaching a peak of 1.2 at 86 samples. The lines end at approximately 0.03 near sample 100. Magenta error bars appear at scattered intervals below the zero line, varying between 0.3 and negative 0.2 throughout, with the highest point at 0.3 near sample 87. Part (c) is titled “L R”. The red and blue lines both start at 1.0 at 0 samples and track each other closely. Both lines oscillate between 0.0 and 1.2, reaching a peak of 1.2 at 86 samples. The lines end at approximately 0.03 near sample 100. Magenta error bars appear more frequently below the zero line, varying between 0.7 and negative 0.3, with the highest point at negative 0.7 near sample 87. Part (d) is titled “N N”. The red and blue lines both start at 1.0 at 0 samples and follow similar patterns. Both lines oscillate between 0.0 and 1.2, reaching a peak of 1.2 at 86 samples. The lines end at approximately 0.03 near sample 100. Magenta error bars extend below the zero line at various points, varying between 0.6 and negative 0.2, with the lowest point at sample 35. Part (e) is titled “R T”. The red line (observed) starts at 1.0 at 0 samples, while the blue line (predicted) starts at approximately 0.6. Both lines oscillate between 0.0 and 1.2, with the red line reaching a peak of 1.2 at 86 samples and the blue line showing a similar peak at approximately 0.8 at the same location. The lines end at approximately 0.5 near sample 100. Magenta error bars appear frequently below the zero line throughout the dataset, varying between 0.6 and negative 0.3, with the highest point at near sample 86. Part (f) is titled “S V M”. The red and black lines both start at 1.0 at 0 samples and track each other moderately well. Both lines oscillate between 0.0 and 1.2, reaching a peak of 1.2 at 86 samples. The lines end at approximately 0.5 near sample 100. Magenta error bars appear more frequently below the zero line, varying between 0.7 and negative 0.3, with the highest point at negative 0.7 near sample 87. Note: All numerical values are approximated.Comparison of actual and predicted thermal conductivity in the training phase ((a) GPR, (b) ET, (c) LR, (d) NN, (e) RT and (f) SVM)