【摘要】 余弦曲线是周期现象的简单模型 .笔者应用余弦模型对通辽市 2 0 0 1年细菌性痢疾发病季节性分布特征进行曲线拟合 ,结果最高月份发病率是 8月 ,与拟合的时间 8月 2 6日相吻合 ;最低月份发病率是 2月 ,与拟合时间 2月 2 6日相吻合更多还原

【Abstract】 Cosine curve is a simple model indicating the periodic phenomenon.In this paper,the curve fitting of the seasonal development of bacillary dysentery in Tongliao,2001 is completed by applying cosine model.The fitting curve shows that the highest and lowest incidents of the disease are August 26 th and February 26 th respectively and they are accordant with the actual seasons-August and February.更多还原