A Complex Evaluation and Optimization Approach for Oxygen-Enriched Combustion Characteristics of Blended Fuels Based on Response Surface Methodology

Table 11

Comprehensive evaluation of R² of combustibility index.

Model	Standard deviation	R^2	R^2 corrected value	R^2 predicted value	Predicted residual sum of squares	Scheme selection
Linear model	7.986	0.599	0.538	0.219	1706.486
2FI	7.038	0.736	0.667	0.081	2003.612
Quadratic equation	3.476	0.946	0.878	0.302	1613.548	Recommended
Cubic equation	0.513	1.000	0.998			Poor