Model evaluation and comparison.

The ΔModel3 column is the sum of the point-wise differences in performance between the model and Model 3 for the same target variable. The se(Δ) column is the standard error of this sum. Model evaluation and comparison.ΔModel3列表示针对同一目标变量（target variable），待评估模型与Model 3之间的逐点性能差异之和。se(Δ)列为该求和结果的标准误。 模型评估与比较。