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.

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。

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By using Input Occupancy Output techniques, this paper has built up an Input Occupancy Output table for New Economy, and studied some important coefficients.

本文利用投入占用产出技术，建立了新经济投入占用产出表，并对几个重要系数进行了核算研究。

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By using Input Occupancy Output techniques, this paper has built up an Input Occupancy Output table for New Economy, and studied some important coefficients.

本文利用投入占用产出技术，建立了新经济投入占用产出表，并对几个重要系数进行了核算研究。

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