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某些疾病(或生理现象)的发生时间在昼夜二十四小时里的分布称为昼时性资料,在全年十二个月里的分布称为季节性资料。本文应用园形分布的原理,通过三角函数代换,对昼时性或季节性流行病学资料,提供
The distribution of some diseases (or physiological phenomena) occurring during 24 hours day and night is called diurnal data. The distribution in the 12 months of the year is called seasonal data. In this paper, we apply the principle of circular distribution and provide trigonometric or seasonal epidemiological data through trigonometric function substitution