fig4

Figure 4. (A) The feature importance and SHAP global impact of the LOI model in the first iteration; (B) The SHAP global impact of the LOI model in the first iteration; (C) The SHAP local impact of the LOI and the interaction of PAPP and MPP on LOI. SHAP: SHapley Additive exPlanations; LOI: limited oxygen index; PAPP: piperazine pyrophosphate; MPP: melamine polyphosphate.