查询词典 envelopment

Based on them, this paper proposes evaluation indexof fund performance from the aspect of finance, investor and interiormanagement. Considering the limitation of data envelopment analysis approach usedto evaluate fund performance, such as conventional DEA models can not considerinputs and outputs of evaluation units simultaneously, and an input-oriented DEAmodel and output-oriented DEA model often produce different evaluation results,this paper proposes a general form of DEA model which is input- andoutput-oriented by using multi-objective optimization and fuzzy set theory. Sincethe general form of DEA model can be transformed into a conventional input oroutput oriented DEA model by using special membership functions, it can beseemed as a nature extense of conventional DEA models, and a conventionalmodel can be regarded as a special case of DEA mdoel with general form.

针对现有基金绩效评价方法中较具优越性的数据包络分析方法的不足，如传统DEA模型不能同时综合考虑评价单元的输入和输出，以及分别采用面向输入和面向输出DEA模型评价基金绩效时，常常出现不一致的评价结果等，本文以多目标优化与模糊集合理论为工具，提出了一种能够同时面向输入和输出的DEA一般形式模型，并通过选择一些特殊的模糊集合隶属函数，使得这种DEA一般形式模型成为传统DEA模型的自然推广，而传统DEA模型是该模型的特殊形式。

The main content of this dissertation is as follows:(1) Based on the rational analysis of production set and production function, the author analyses and summarizes the non-parametric method of studying the production frontier-Data Envelopment Analysis, and points out its finity.

本文的主要工作是：(1)本文首先在合理分析生产集与生产函数的理论的基础上，全面分析总结了研究生产前沿的非参数方法——数据包络分析方法，指出了它的局限性。

The thesis is based on income question, forest coverage rate and grop production.to beging with, date envelopment analysis is proved that it can be applicated into grain for green in shan-bei district, and then in view of the fact, seven esential factors which have influence on the project are found out: expense of dam, expense of crop,expense of cash tree ,expense of defense tree,other economic crop,expense of grass and graziery;and the output factors include:income of gdp,pure income per captia,the area of decreasing land loss,graziery income ,crop production,income of tree,the totle income of economic crop.after the date of each facts are puted into dea model,unefficiencial decision making units found.the data that are got through adjusting unefficiencial dmus dy dea can offer guide in shanbei district upgrading of an industrial structure.at the same time ,taking into account some possible problems in or after grain for green in shan-bei district,the thesis bring out some propesal to improve the circumstance,enhance the life level and putthe relation of population,resource and circumstance into a healthy orbit.

论文以解决陕北地区的收入问题，植被问题以及粮食产量问题为出发点，首先从理论上分析了包络分析方法在陕北地区退耕还林中运用的可行性，然后结合陕北地区目前的实际情况，综合分析出影响陕北地区退耕还林的关键的七个因素作为输入指标：水利水保设施投入，农作物投入，经济林种支出，防护林支出，其它经济作物，草类支出，畜牧业投入；以退耕还林所要解决的最终问题作为输出指标：GDP收入、农民人均纯收入、水土流失减少量、牧业总产值、粮食产量、林业总产值、其他经济作物总产值。将各指标所对应的数据代入模型后，通过分析求解得出非有效的决策单元，再运用包络分析方法的一些基本原理对非有效的决策单元进行调整，由此所得的数据对陕北地区的实际投入具有很好的指导意义。同时，又针对陕北地区在退耕还林过程中以及之后可能面临的困境，提出了一些建议和对策。最终使得陕北地区的投资环境尽快得以改善，使农民尽快脱贫致富，使人口、资源、环境的关系尽快纳入良性循环的轨道上。

In this paper, according to the features of assessment index for the cleaner production, the unexpected input, the multi-usage of resources and energy is used as output, while the unexpected output, index of pollutants as input. Then the data envelopment analysis is applied to assess the cleaner production schemes for enterprises to find out the nonpaying schemes. Then improve the nonpaying schemes into effective ones.

本文根据清洁生产评价指标的特征，将资源能源综合利用指标等非期望输入等作为一种输出，污染物指标等非期望输出作为一种输入，引入到数据包络分析模型中，对企业的清洁生产方案进行科学客观的有效性评价，并找出非有效的方案，时其进行有效性改进。

We use the data envelopment analysis model to evaluate the synergetic development of city traffic based on the input－output matrix and the index of sustainable development,provide an approach of evaluating the validity degree of "synergia" and"development" within the city traffic system and among subsystems,and get the integrated evaluation index of the synergetic development of city traffic system.

从城市交通系统的各个子系统内与系统间的投入产出角度出发并结合城市交通可持续发展指标体系建立基于DEA的综合评价模型，给出城市交通系统&协同&和&发展&有效度的评价方法与指标，进而得到城市交通系统协同发展的综合评价指标对其进行综合评价。

Other effects to avoid are reingestion, in which the reversed plume reenters the engine inlet, engine ingestion of debris blown up from the runway, and plume envelopment of the vertical tail, which affects directional control.

其他的影响，以避免被reingestion ，其中扭转羽reenters的发动机进气道，发动机摄入的碎片被炸的跑道，和羽包络的在垂直尾翼，这影响到方向控制。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷