Description of demographics and PA results. by Mi Zhou (9884)

“…<div><p>Background</p><p>Physical activity (PA) is important for students in secondary school, however, trends in PA among secondary school students have shown a significant decline. …”

Error boxplot and violin graphs for the previously published and proposed GPR models. by Fahd Saeed Alakbari (10701871)

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The optimized GPR approach’s cross-plotting for the testing dataset. by Fahd Saeed Alakbari (10701871)

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Residual error of fracture pressure for all studied models. by Fahd Saeed Alakbari (10701871)

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Fracture pressure based on previous Poisson’s ratio models. by Fahd Saeed Alakbari (10701871)

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Group error analysis of bulk formation density for the proposed GPR and some previous approaches. by Fahd Saeed Alakbari (10701871)

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The optimized GPR approach’s error histogram of the training dataset. by Fahd Saeed Alakbari (10701871)

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The optimized GPR approach’s errors histogram of the testing dataset. by Fahd Saeed Alakbari (10701871)

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Group error analysis of shear time for the proposed GPR and some previous approaches. by Fahd Saeed Alakbari (10701871)

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The optimized parameters of the proposed GPR method. by Fahd Saeed Alakbari (10701871)

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The optimized GPR approach’s error histogram of the validation dataset. by Fahd Saeed Alakbari (10701871)

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Cross-plots of (a) the proposed GPR, Ranjbar-Karaml et al. [14], Christaras et al. [52], Feng et al. [16], Gowida et al. [17] models and (b) Khandelwal et al. [13], Brandås et al.... by Fahd Saeed Alakbari (10701871)

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Group error analysis of compressional time for the proposed GPR and some previous approaches. by Fahd Saeed Alakbari (10701871)

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The optimized GPR approach’s cross-plotting for the validation dataset. by Fahd Saeed Alakbari (10701871)

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(a) Average absolute percentage relative error (AAPRE), and, (b) Coefficient of determination (R²) of the models. by Fahd Saeed Alakbari (10701871)

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(a) Taylor diagrams of Khandelwal et al. [13], Brabdas et al, Kumar et al. [12] models. (b) Taylor diagrams of Ranjbar-Karami et al. [14], Christaras et al. [52], Feng et al. [16],... by Fahd Saeed Alakbari (10701871)

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(a, b). The statistical error analyses for the models using the same dataset. by Fahd Saeed Alakbari (10701871)

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The optimized GPR approach’s cross-plotting for the training dataset. by Fahd Saeed Alakbari (10701871)

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Methodology flowchart. by Fahd Saeed Alakbari (10701871)

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The most common machine learning methods to predict ν_s. by Fahd Saeed Alakbari (10701871)

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