当我们构造多部门数量经济模型的时候，往往要将千千万万种产品归结为几种产品或者几个部门。
The construction of multi-sector econometric model often involves grouping millions of different goods into a few products or sectors.
并在此基础上，构建了单井经济效益评价的数量经济模型，以此来确定单井的极限经济产量与单井经济效益的划分类型。
On the base of which, to build the economic evaluation models of the single well, in order to determine the limits of economic output and the effective classification of the single Wells.
本研究采用数量经济方法，建立建筑节能对建筑能耗的直接经济和环境影响测算模型。
This paper established a quantitative economics model to evaluate the direct economic and environmental impact of building energy efficiency on building energy consumption.
利用二次移动平均模型，引入均方拟合误差最小的原理确定出时段数n，对国民经济总收入、人口数量等项目进行了预测。
The total income of national economy and the amount of population are predicted with second-degree moving model and with the principle of least mean square fit error determining designated value n.
利用二次移动平均模型，引入均方拟合误差最小的原理确定出时段数n，对国民经济总收入、人口数量等项目进行了预测。
The total income of national economy and the amount of population are predicted with second-degree moving model and with the principle of least mean square fit error determining designated value n.
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