利用投入占用产出技术及系统科学方法，对2030年中国的粮食产量、粮食进口量及自给率进行了预测。
Using the input-occupancy-output techniques and system science methods, this paper makes a forecast about Chinas grain output, grain import and self-support rate in the year 2030.
本文利用指数平滑法，并结合本溪市1991- 1999年粮食产量的统计资料对未来几年内本溪市的粮食产量做出了预测。
By using smoothed exponential method and combining the statistic data of grain yield in 1991-1999 for Benxi area, the paper presents perspective grain yield in the near future fears.
本文利用指数平滑法，并结合本溪市1991- 1999年粮食产量的统计资料对未来几年内本溪市的粮食产量做出了预测。
By using smoothed exponential method and combining the statistic data of grain yield in 1991-1999 for Benxi area, the paper presents perspective grain yield in the near future fears.
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