The researches were captured by sampling investigation on soil animals in purple soil of 3 kinds of different habitat in Qidong county, Hunan during 2001-2002.
2002年，对湖南省祁东县紫色土分布区按不同生境设3个样区进行土壤动物调查。
Objective This article introduces Bayesian graphical modelling and analyze incidence data of primary live cancer in Qidong county, and predict incidence rate of Primary live cancer next period.
目的为了较为系统地介绍贝叶斯图解模型，并用于肝癌发病资料分析和发病率预测。方法利用贝叶斯图解模型和年龄队列模型对肝癌发病的年龄、出生队列效应的参数进行估计。
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