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世界范围的各年龄组甲肝抗体流行率可分为6种流行模式。在我国可初步分为3种:北京式,上海式,广州式。Schenzle于1979年提出了一种感染力为Logistic函数的简单催化模型,本文作者又给出了感染力为线性函数,二次函数时的简单催化模型,结合实际资料,对这3种流行模式进行了拟合,经拟合优度x~2-检验,效果良好。通过对模型的分析,得出了70年代后上海市的甲肝感染力比北京、广州要低的结果。而流行率模式的不同是由于感染力函数不同所致。
Hepatitis A antibody prevalence in all age groups across the world can be divided into six popular modes. In our country can be divided into three types: Beijing style, Shanghai style, Guangzhou style. Schenzle proposed a simple catalysis model with infectivity Logistic function in 1979. The author also gave a simple catalysis model with infectivity as a linear function and quadratic function. Combining the actual data, the three popular models Fitting, the goodness of fit x ~ 2 test, the effect is good. Through the analysis of the model, it is concluded that the infection rate of hepatitis A in Shanghai is lower than that of Beijing and Guangzhou in the 1970s. The difference in prevalence rates is due to different infectivity functions.