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余弦模型的建立为人体生物节律周期性(如生理指标波动的昼夜规律)研究提供了科学的分析方法。童建对模型的定义、公式、计算、分析以及显著性检验作了详细论述。最近,王成科将余弦模型分析法应用于麻诊和百日咳的发病季节特征研究,以揭示疾病发生的季节
The establishment of a cosine model provides a scientific analytical method for the study of the circadian rhythms of the human body, such as the circadian rhythm of physiological indices. Tong Jian elaborated on the definition, formula, calculation, analysis and significance test of the model. Recently, Wang Cheng-ko applied the cosine model analysis to seasonal characteristics of onset of measles and whooping cough to reveal the season when the disease occurred