The concept of assessment reference period is put forward. The relation among exceeding probability, recurrence period and annual mean incidence of intensity is deduced.

提出评估基准期的概念，推导出烈度的超越概率与重现期、年平均发生率三者间的关系。

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Objective:Investigated the incidence of college students' hematochezia, comprehended the related factors, mean while provided health education, to reduce the symptoms.

目的：调查大学生便血的发病情况，了解相关因素，提供健康教育，减少便血症状。

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Positive rate of biopsy, mean puncture time, incidence of intrapulmonary hemorrhage and incidence of pneumothorax were also calculated.

统计两组相关指标：平均穿刺时间、活检阳性率、肺内针道出血发生率及气胸发生率。

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But if Svensmark was correct, it would mean that periods of high solar output should coincide with reduced cloud formation (due to reduced cosmic ray incidence), which in turn would have a warming effect on the Earth, since less sunlight would be reflected back into space by clouds.

FORBES: Did CLOUD Just Rain on the Global Warming Parade?