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应用圆形分布探讨疾病流行规律黄竖城本文用圆形分布法［１］分析剑阁县１９５７～１９９０年痢疾等４种疾病资料的季节性流行规律效果较好，现简述如下：１．发病季节高峰期时间分析圆形分布中反映疾病高峰时点的指标是角均数ａ，圆形分布中表示变异程度的指标是角标准差...
Applying the circular distribution to discuss the disease epidemic law HuangChuangIn this paper, the circular distribution method [1] is used to analyze the seasonal epidemic law of the four disease data of dysentery from 1957 to 1990 in JianGe County. The results are summarized as follows: 1. Analysis of the seasonal peak of the onset season The indicators reflecting the peak of the disease in the circular distribution are the average angle a, and the index indicating the degree of variation in the circular distribution is the angle standard deviation ...