年值法

采用费用年值法对几种能源供暖方式的经济性和使用过程的技术性进行了比较。

Compares the economic and technical features of various heating methods in application .

在寿命期不等的互斥方案优选中，净年值法是一种合适的方法。

NAV is a proper method for comparison of the schemes with different life .

本文采用年值法建立了包含输气干线优化设计和压缩机站优化运行的综合优化模型，这两个模型分别属于混合离散优化和组合优化。

In this paper , the method of annually costs is used to found the collective optimization model including gas transportation pipeline optimum design and compressor station optimum operation .

分析了开关投资、运行维修费用、停电损失和网络损耗的计算方法，基于等年值法建立了开关优化的含约束、非线性的组合优化模型，采用了灾变遗传算法来求解这类优化问题。

This paper presents a model considering investment , maintenance , outage cost and line loss which is formulated as a combinatorial constrained optimization problem with constraints and non-linear objective function .

最后利用费用年值法对太阳能采暖系统以及其他常规能源系统进行经济性分析与环境效益分析。

In the last part , using the method of annual cost , the article made analysis of solar heating system and other conventional energy system in economy as well as environmental benefits .

最后，应用费用年值法，比较分析了数种供暖空调方案的费用年值，得到了不同情况下冷热源方案的最佳选择。

At last , the annual cost value method was adopted in conducting a comparative analysis with other traditional schemes , and some important conclusions are drawn about the best choice of cold and heat source scheme in different cases .

如果是两个以上的方案需要用净现值法、净年值法、费用现值法和费用年值法进行判断，从中选出最优方案。

When there are two or more options , then one must use net current value method , net year-end value method , cost current value and cost year-end value method to make a judgment and find the most optimal option .

工程经济给出寿命期不等的互斥方案求解的多种解法，如最小公倍数寿命法、无穷大寿命法、研究期法、净年值法等，但对上述诸种方法之间的关系缺乏系统研究。

There are several solutions for exclusive projects in engineering economics , taking minimum common multiple lifetime method , infinite lifetime method , research period method and net annual value method as examples . There are no systematic researches for these solutions mentioned above .

对安全投资经济效益评价方法进行了分类，并对经济效益评价的现值法、年值法和内部报酬率法进行了分析；

The evaluate methods of safe investment economy benefit for coal mine are classified . The Net Present Worth ( NPW ) method , the Annual method and the Internal Rate of Return ( IRR ) method of the economic benefit evaluation are introduced .

还运用等年值法对其投资运行费用进行了综合比较，推荐在可靠性要求不高的地区采用双T型接线方式，在可靠性要求较高的地区采用单T型接线方式。

After the synthetical comparison of economical indices for their investments and service fees by the uniform annual value method , it is recommended to use double T connection in low reliability required district and to use single T connection in high reliability required district .

根据工程经济学的观点，利用投资效果系数对不同天然气加气站的初始投资进行了折算，并引入费用年值法对不同加气站的经济性进行了分析。

In light of the concept from engineering economics , the initial investments on different gas stations have been calculated by use of the investment effect coefficient , and meanwhile their different economic efficiency analysis has also been discussed taking use of the annual-cost method .

介绍了利用价值工程进行锅炉房设计方案评价的方法，阐述了价值、成本和功能之间的关系。采用费用年值法和10分制加权评分法，确定成本系数和功能系数。

The evaluation method for design scheme of boiler room by value engineering is introduced , the relationship between value , cost and function is expounded , and the method of annual cost and weighted-in-points method with 10 points are used to determine the cost coefficient and the function coefficient .

建议《室外排水设计规范》尽早改用年最大值法选样。

It was recommended that the annual maximum value method is worth to accept by the design code .

本文提出的论证与计算方法为改用年最大值法选样提供了实用条件。

The arguments and calculation methods proposed in this paper provid the practical criteria to employ the AM .

理论分析表明：年最大值法应用到排水设计是可行，但迄今为止我国还没有进行系统的研究。

Those results showed : the annual maximum method was feasible to being applied to the urban drainage engineering , but it didn 't study systematically still .

经济方面采用动态年费用值法，环境方面主要考虑系统的污染物排放量和二氧化碳减排量。

Of which economic benefit contrast used cost year-end value method , and conservation aspect was detailedly analyzed discharge amount of primary energy pollutants , greenhouse gas reduction .

针对石油企业设备更新的特点，采用年值成本法构造目标函数，建立了一套适合石油企业设备更新决策的方法，并给出了相关计算公式和应用实例。

Based on the characteristics of petroleum equipment renewal , this paper uses annual cost method to construct target functions , develops a set of method to adapt decision making on equipment renewal , and also gives related formulas and application examples .

本文运用统计试验方法对部分历时序列法与年最大值统计法两种不同取样方法的比较、不同阈值对频率分析结果的影响等方面进行了研究。

Comparison has been done about the sample selecting of the partial duration series method and the annual maximum series method by using the statistical simulations . The effect of different threshold values on the frequency analysis results has been studied .

近几年来，很多学者对年最大值法进行研究，取得许多成果。

In recent years , a lot of scholars carry on studies to annual maximum method and obtain many results .

为了解决工程设计与实际资料统计之间存在的矛盾，寻求不同选样之间的频率转换方法，对年多个样法与年最大值法之间3种次频率与年频率之间的转换关系式进行了分析。

To solve the contradiction between the engineering design and the data sampling , it is really meaningful to look for the frequency conversion formulas among the different sampling methods . In this paper , three frequency conversion formulas between annual multisampling and annual maximum method are analyzed .