Figure 4
The figure contains six scatter plots labeled from Part (a) to (f). All graphs share the same axis structure: the horizontal axis is labeled “Real Thermal Conductivity (watts per (meter kelvin))” and ranges from 0.0 to 1.5 in increments of 0.5, while the vertical axis is labeled “Predicted Thermal Conductivity (watts per (meter kelvin))” and also ranges from 0.0 to 1.5 in increments of 0.5 watts per meter kelvin. Each graph contains a solid black diagonal line extending from (0.0, 0.0) to (1.5, 1.5). Two dashed magenta lines run parallel to the diagonal line: one labeled “positive 20 percent” extending from approximately (0.0, 0.0) to (1.2, 1.5), and another labeled “negative 20 percent” extending from approximately (0.0, 0.0) to (1.5, 1.2). Part (a) is titled “G P R” with “R squared equals 0.97” displayed. Blue data points are scattered closely along the diagonal line, showing a strong positive correlation between predicted and real values across the entire range from 0.0 to 1.2. The points are denser between 0.0 to 0.5 on both axes. Part (b) is titled “E T” with “R squared equals 0.88” displayed. The blue data points show more scatter than Part (a), particularly at higher conductivity values above 0.5, indicating moderate positive correlation. The points range from 0.0 to approximately 1.2 on both axes. Part (c) is titled “L R” with “R squared equals 0.7” displayed. The blue data points exhibit considerable scatter throughout the range, with the widest dispersion occurring between 0.5 and 0.8. Points extend from 0.0 to 1.3 on both axes. Part (d) is titled “N N” with “R squared equals 0.92” displayed. The blue data points are moderately clustered along the diagonal line, showing better correlation than Parts (b) and (c) but slightly more scatter than Part (a), particularly in the mid-range values. Points range from 0.0 to approximately 1.3 on both axes. Part (e) is titled “R T” with “R squared equals 0.66” displayed. The blue data points exhibit significant scatter throughout the range, with a notable horizontal clustering. Points extend from 0.0 to approximately 0.8 on both axes. Part (f) is titled “S V M” with “R squared equals 0.82” displayed. The blue data points are moderately clustered along the diagonal line, showing denser from 0.0 to 0.5 on both axes. The scatter increases at higher conductivity values above 0.6. Points range from 0.0 to approximately 1.2 on both axes. Note: All numerical values are approximated.Regression analysis of thermal conductivity for each model in the training phase ((a) GPR, (b) ET, (c) LR, (d) NN, (e) RT and (f) SVM)