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1949~2006

1949~2006

1949~2006

1949~2006

1

The research results showed that the cultivated land changes from 1949 to 2006 in Qingzhen City showed an overall decreasing trend .

研究表明，1949~2006 年清镇市耕地变化的总体趋势是不断减少；

2

This paper studies the Shaanxi population time series (1949-2006 ), and establishes its ARIMA model by B-J method .

通过研究陕西省人口总量时间序列（1949~2006 年），应用 B-J 法建立了 ARIMA 模型。

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