为给商品薯的科学收获时间提供理论参考，设置不同收获时间对马铃薯大西洋产量及产值的影响试验。
Atlantic, a potato variety, was tested under different harvest time to study the effects on yield and output value for providing the theoretical basis of rationally harvesting commercial potato.
采用灰色系统理论的预测方法，以1999～2004年广州市的房地产产值为基础数据，建立了广州市房地产产值预测模型，并在此基础上对广州市区未来的房地产产值进行了预测。
The paper uses the forecasting method of grey system theory and builds the forecasting model of real estate production value of Guangzhou city based on the data from 1999 to 2004.
本文提出产值计算价格和生长量系数两个概念，并运用它们，从理论上解决了营林产值计算问题。
In this paper, two concepts calculated price of output value and coefficient of increment are put forward, with which the problem of calculating output value of silviculture is solved in theory.
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