项目分析的判别指标中，最常用的是临界比值法(critical ration)，此法又称为极端值法。分析时先将测验总分加总，再依其得分高低排序，选前27％为高分组，后27％为低分组，再求高低两组在每个题...
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利用比值植被指数（RVI）分析法，与实地虫灾调查相结合，找出了受虫灾影响后不同灾害程度的RVI临界值，判对率为73%。
The ratio vegetation index(RVI)method is combined with field survey of insect pest to determine critical values of RVI for different degrees of disaster and the judgement accuracy reaches 73%.
将疲劳切口系数定义为临界距离法得出的平均应力与热点应力之比值。
The fatigue notch factor is introduced as the ratio of average stress over the region of a critic distance around critic point to the hot spot stress.
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