It is difficult to define the value of comprehensive variability coefficient of resisting force and acting force in reliability index inspection.

抗力和作用力的综合变异系数的取值是规范套改中可靠度指标检验中的难题。

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Objective: To assess the instructional value of heart rate variability index (HRVI) used for acute myocardial infarction (AMI) patients under the early rehabilitation exercise.

目的：评价心率变异指数对急性心肌梗死(ami)患者进行早期康复锻炼的指导意义。

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Instability index: An index which measures the variability of world prices for selected agricultural commodities.

不稳定指数：一种用于衡量部分农产品的国际价格变动的指数。

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Heart-rate variability, says Dr Stein, is a good index of the degree of control an individual has over his autonomic nervous system (which controls many of the internal organs).

ECONOMIST: Diet and behaviour