方法用季节预测法中的移动平均比率法计算趋势值与调整月指数 ，最后应用模型。
Methods The trend values were calculated and the monthly indexes were adjusted with moving average method of season prediction method, and then the model was applied.
文章用X-12-ARIMA季节调整模型对中国1997年1月至2009年12月的粮食消费价格月度定基指数进行分解，并得到趋势循环、季节和不规则因素；
The article decompose the monthly fixed base index of consumer food prices from January 1997 to December 2009 in China with X - 12 -ARIMA seasonal adjustment model and Demtra software.
文章用X-12-ARIMA季节调整模型对中国1997年1月至2009年12月的粮食消费价格月度定基指数进行分解，并得到趋势循环、季节和不规则因素；
The article decompose the monthly fixed base index of consumer food prices from January 1997 to December 2009 in China with X - 12 -ARIMA seasonal adjustment model and Demtra software.
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