First-order and total-order Sobol indices for the <i>Dimensionless Case</i>: The first- and total-order sensitivity indices are calculated from 20, 480 4-tuple samples.

First-order indices characterize a parameters individual contribution to the variation in the model’s output. Total-order indices characterize a parameters total contribution to the variation in the model’s output which includes higher order interactions.一阶指标（First-order indices）用于表征单个参数对模型输出变异的独立贡献。总阶指标（Total-order indices）用于表征单个参数对模型输出变异的全部贡献，其中包含高阶交互效应。