之后，对灌溉效益特点进行深入地分析，并使用模拟方法，以经济净现值为指标对研究区的农业灌溉方案的经济效益进行模拟求解。
After these, this paper analyses the features of irrigation benefits, and calculates the average benefit of every scheme with simulated method, using Economic Net Present Value.
即通过接种疫苗和治疗的成本与那些若不给予治疗生命危在旦夕的人将来收入的净现值之比来估量经济成本。
Measuring economic costs weighs the expense of both vaccination and illness against the net present value of the future earnings of someone who would otherwise die from the disease.
净现值大于零说明项目对公司有正的净经济效益。
A net present value of greater than zero indicates that the project has positive net economic benefit to the company.
我们从净现值和内含报酬率的经济含义出发研究了产生矛盾的原因和解决矛盾的办法。
We set out from net present worth and the economic implication that embedded pay leads the matter that considered to produce contradiction and the way that settle contradiction.
本文介绍了企业资源计划(erp)的基本含义，利用净现值评价法和期权定价理论，探讨了论企业资源计划(erp)系统实施的经济评价问题。
This paper introduces the basic contents of Enterprise Resource Planning (erp), discusses economical evaluation problem of implementing erp system by use of NPV method and options pricing theory.
传统的国民经济评价方法一般是根据净现值的大小一次做出决策，不考虑项目的内外部环境的变化对项目的影响。
Traditional evaluation method of national economy is to make a decision at one time by the net present value, without considering the influence induced by the change of project environments.
净现值法是项目投资决策的常用方法之一，它是经济决策中的一动态指标，需要一个重要的输入变量即方案的必要报酬率。
It is a dynamic index in economic decision and requires an important input variable which is the necessary guerdon rate of project.
通过净现值法计算出的最小经济储量规模，提供了十屋断陷天然气勘探规模的经济界限。
The minimum economic reserves calculated with net present value method offer the economic limitation of gas exploration in Shiwu sag.
工程经济学的基本方法，包括净现值分析法、寿命周期成本法、收益-成本分析法和其它项目评估方法。
Basic techniques of engineering economics, including net present value analysis, life-cycle costing, benefit-cost analysis, and other approaches to project evaluation are among the topics covered.
并确定了生产规模的可行范围，并以矿井生产寿命期内获得净收益现值最大为目标，给出了一种确定矿井最优生产规模的经济数学方法。
The available ranges of production scale are determined based on the analysed result. The method to get the best production scale is determined for getting the most profit in the whole mine.
并确定了生产规模的可行范围，并以矿井生产寿命期内获得净收益现值最大为目标，给出了一种确定矿井最优生产规模的经济数学方法。
The available ranges of production scale are determined based on the analysed result. The method to get the best production scale is determined for getting the most profit in the whole mine.
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