CEA, CUA 和CBA三者都用增量比(incremental ratio, IR) ，即两种健康干预成本的差值除以健康结局的差值。表5.1给出了相应的计算公式。
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power incremental ratio 功率增量比
strain incremental ratio 应变增量比
ICOR incremental capital-output ratio 资本产出增量比
incremental ratio of consumption 耗量微增率
incremental capital-output ratio 增量资本产出率 ; 递增资本产量比 ; 增量资本产出比
incremental cost-effectiveness ratio 增量成本效果比
incremental-benefit-cost ratio 增量效益成本比
The experimental data available in literature were employed to build the incremental ratio function for relative permeability of two-phase medium.
基于已有的岩心实验数据，构造了振动采油条件下两相介质相对渗透率的变化率函数。
The results indicate that the relationship between stress ratio and strain incremental ratio in these materials is still a linear relation on the extended moblized plane.
结果表明，在扩展强度发挥面上，这几种材料的应力比与应变增量比之间仍具有线性关系。
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