Investigation on relationship between annual family income and overweight,obesity in Nanjing;
南京地区居民家庭年收入与超重和肥胖关系
With the grey systems, the research on forecast model GM(1,1) of residents′ percapita income in HeBei province gets a forecast accuracy.
运用灰色系统理论,对河北省城镇居民人均年收入建立了GM(1,1)预测模型,并进行了预测。