对项目投资决策中主指标的探讨

项目投资决策的主指标是净现值和内含报酬率 ,运用它们进行长期投资决策分析。然而 ,如何在全部自有资金和部分自有资金的条件下 ,编制两张现金流量表进行对照分析 ,现行理论与实际工作脱节。净现值侧重于投资效益分析评价 ,内含报酬率侧重于投资方案承受风险能力的分析评价。

河流健康评价的主评指标筛选

由于河流作为能量和物质传输的载体,对于整个陆地生态系统的良性循环都起着至关重要的作用,同时对于洪水的治理以及生态区的保护都起着十分重要的作用。人类对河流各项功能的要求越高,其功能阈值也就会相应地不断缩小,而为了更好地满足生产发展的需求,人们便会不断加大对河流资源的开发力度,久而久之便形成了恶性循环。那么怎样才能对河流健康状况进行有效的评价,并采取一定的保护和修复手段,从而使得河流生态系统可以更好地服务于人民,不断促进社会经济和环境之间的协调发展。鉴于此,本文主要对河流健康评价的主评指标筛选进行了一定的研究。

1:25万土壤及地形数据库及指标体系研究

根据土壤及地形(SOTER)数据库基本原理和方法建立1∶25万SOTER数据库,重点研究和修正大中比例尺SOTER主地形体划分指标体系,提出海拔高度分组指标、坡度分组指标和地势起伏强度分组指标,并利用上述3个指标组合计算出样区SOTER主地形体组分(中坡度丘陵、低坡度山体台地、山谷、中坡度山体、山前倾斜平原和冲洪积平原),以进一步发展和完善SOTER数据库理论方法体系。同时,SOTER数据库的建立使原有的历次土壤普查、国土资源详查的资料信息化,使之服务于土地资源的评价、管理与保护。

基于偏导数的Sobol’总测度指标的上下限分析

以Sobol’主测度指标Si作为总测度指标Stoti的下限,建立并推导了基于偏导数的测度指标作为Stoti的新上限。基于泛函和Euler-Lagrange等式,进行了不同变量分布形式下(均匀、正态、指数、Beta、三角分布等),Sobol’总测度指标Stoti的基于偏导数的上限分析,并给出了新上限详细的推导过程和具体的计算公式。通过简单数值和工程算例,验证了新上限的精度及效率,为更准确地界定总测度指标Stoti的取值区间提供了参考。

我国上市公司财务状况的非线性主成分分析研究

文章通过对我国上市公司的财务指标进行综合分析 ,构建了我国上市公司财务状况综合分析的非线性主成分分析模型 ,并应用该模型对上市公司财务状况进行了合理的评价 .

基于频响主元的卫星结构损伤定位与评估方法

鉴于目前国内卫星预、复振频响结果的评估主要依靠设计师的经验分析,缺乏高效准确的量化手段,文章基于频响函数(FRF)的主元分析(PCA),提出了两种针对卫星结构的损伤定位指标,分别是多主元综合指标和FRF主元残差均方根;并采用平方预测误差(SPE)指数对卫星结构的整体损伤程度进行评估。以卫星主承力部件中心承力筒为分析对象,验证了基于卫星结构频响主元的损伤定位和评估方法的有效性。文章对基于预、复振对比分析的损伤识别、量化试验评估标准、提高卫星研制效率有促进作用。

基于主成分分析的房地产上市公司财务绩效评价

利用spss软件及excel软件,以2010年至三季度的财务报告为基础,通过所选区的财务指标,采用主成分分析的方法,对目前我国房地产上市公司的财务绩效进行分析和评价。

河流健康评价的主评指标筛选

河流健康是近年来探讨水资源问题的一个热点,其评价指标体系正成为河流管理的目标。为了筛选出一些基本的、易于量化的主要评价指标来揭示河流健康基本状况和变化趋势,通过对1972～2010年约150篇相关文献、45个河流健康评价指标体系902项指标的整理和归纳,应用统计、层次和相关性分析法,确定各指标的被采用率,并同时综合考虑指标的重要性、普遍性、可量化性和易获得性,筛选出揭示河流生境物理、水环境、生物和水资源利用4类特征的主要指标。结果表明,有以下8个指标可作为河流健康的主评指标:河岸植被覆盖率、河流连通性、湿地保留率、径流量变化率、水质达标率、鱼类生物完整性指数、水资源利用率和流域天然植被覆盖率。

基于产业竞争优势评价的武汉重点产业筛选

本文运用主成分分析方法、SPSS软件构建武汉产业竞争优势评价指标体系,对武汉34个产业的竞争优势进行了计量评价。研究表明,武汉现有的34个产业从竞争优势角度可分为3类:强竞争优势产业、一定竞争优势产业和弱竞争优势产业。据此,本文筛选出武汉应重点发展的产业部门,针对这些产业的发展提出5条建议。

生活质量研究进展综述

我国在８０年代实行改革开放以后，人民的生活水平不断提高，开始了对生活质量的追求。国内外学者进行生活质量研究必须了解的三个问题是：如何理解生活质量概念；如何测量和评估生活质量；如何把握生活质量研究进程。

安徽省红色旅游资源发展水平的综合评价与保护性开发对策研究

安徽省红色旅游资源丰富,着眼于党的十八大对革命老区建设对口支持的大背景下,重点阐述了评估红色旅游区发展水平的方法。利用主成分分析方法,构建保护性开发评价指标体系,以经济、基建、生态和风景4大主成分为基准,并通过Fuzzy AHP方法求得4大指标的权重指数,构建模糊综合评价模型。通过相对偏差模糊矩阵计算出各个红色旅游区保护性开发的综合评价值,据此进行排序,得到以皖西大别山区、皖南渡江战役等地为代表的红色旅游区发展明显优于皖北双堆集等其他地区的结论。分别从旅游管理者(政府)、旅游经营者(企业)等角度提出建议与措施,为安徽省红色旅游资源景区的保护性开发以及促进当地经济可持续发展提供参考。

Energy poverty in Greek mountainous areas： a comparative study

The paper studied the energy poverty in the mountainous areas of Greece through parallel primary surveys, in comparison with the country-level conditions. The surveys are based on objective financial and expenditure data as well as on subjective views about housing conditions. The objective approach showed that mountainous areas of Greece are burdened with much higher energy expenditure while also having lower annual incomes. Under these circumstances, the energy poverty rate skyrocketed to73.5%. The subjective indicators reveal significant aspects of the problem, such as the intense problem of damp walls and mold growth at home or the restriction of other basic needs in order to cover heating needs. However, despite the proven high vulnerability of Greek mountainous areas, current energy policy actually ignores the special features of mountainous areas, implementing horizontal policies.Therefore, a specialized energy plan targeted to alleviating energy poverty in mountainous areas in Greece is an urgent imperative.

Ultimate end bearing capacity of rock-socketed pile based on generalized nonlinear unified strength criterion

In order to study the mechanism of bearing behavior at the tip of a pile embedded in rock, the generalized nonlinear unified strength criterion and slip line principle for resolving the differential equation systems which govern the stress field were applied to derive the ultimate end beating capacity based on some reasonable hypothesis and failure plane model. Both numerical simulation and test results were compared with the theoretic solution. The results show good consistency with each other and verify the validity of the present approach. The depth effect with respective to embedment ratio and other influence factors like geological strength index, intermediate principal stress, overburden factor, and damage on end bearing capacity were discussed in the analytical solution. The results show that the proposed yield criterion can be much better for investigating the ultimate end bearing performance of rock-socketed pile. The end bearing capacity increases with embedment ratio and the increasing degree is influenced intensely by the above parameters. Furthermore, ignoring intermediate stress effect would underestimate the strength properties of the rock material and lead to a very conservative estimation value.

极地特殊环境下的睡眠障碍研究进展

极地研究是我国海洋强国建设的重要组成部分,做好极地医疗保障具有重要的国家和军事战略意义。极地的特殊环境可对作业人员的生理、心理健康造成严重的影响,睡眠障碍作为其中较为突出的问题愈发引起重视。导致极地睡眠障碍的原因十分复杂,至今尚未完全阐明。笔者从极地睡眠障碍的影响因素出发,结合相关研究手段对该问题的可能机制与解决方案的最近研究进展进行综述,为深入开展极地睡眠障碍问题研究提供理论基础。

Evaluation of the propensity for coal spontaneous combustion based on catastrophe theory

Generally, different prevention measures should be taken according to spontaneous combustion propensities. The current methods to evaluate the propensity of coal spontaneous combustion, such as chromatographic method of oxygen adsorption, oxidation kinetics method and activation energy method, are mostly affected by human factors. Their boundaries among different classes of propensities were all established by subjective judgments. A new evaluation method using catastrophe theory is introduced. This method can accurately depict the process of coal spontaneous combustion and the evaluation index, ＂catastrophe temperature＂, be obtained based on the model. In terms of catastrophe temperature, the spontaneous combustion propensity of different coals can be sequenced. Experimental data indicate that this method is appropriate to describe the spontaneous combustion process and to evaluate the propensity of coal svontaneous combustion.

A Static Solution of Yang-Mills Equation on Anti-de Sitter Space

Since product metric on AdS space has played a very important role in Lorentz version of AdS/CFT correspondence, the Yang Mills equation on AdS space with this metric is considered and a static solution is obtained in this paper, which helps to understand the AdS/CFT correspondence of Yang Mills fields.

Effects of functional training on geometric indices of heart rate variability

Background： Geometric methods provide an analysis of autonomic modulation using the geometric properties of the resulting pattern, and represent an interesting tool in the analysis of heart rate variability （HRV）. The aim of this study was to evaluate the impact of functional training on cardiac autonomic modulation in healthy young women using the geometric indices of HRV. Methods： Data were analyzed from 29 women, and were stratified into a functional training group （FTG, n = 13; 23.00 ± 2.51 years; 21.90± 2.82 kg/m2） and a control group （CG, n = 16; 20.56 ± 1.03 years; 22.12±3.86 kg/m2）. The FTG received periodized functional training for 12 weeks. The cardiac autonomic modulation of both groups was evaluated before and after this training, and a qualitative analysis was performed using the Poincar6 plot. Results： There was a significant increase in the difference of the triangular index （RRTri）, SDI, SD2, and RR intervals in the FTG as compared to the CG, and the qualitative analysis from the Poincar6 plot showed an increase in the dispersion of beat-to-beat and long-term RR intervals in the functional group after training. No changes were observed in the triangular interpolation of RR interval histogram （TINN） or SD1/SD2. Conclusion： Functional training had a beneficial impact on autonomic modulation, as characterized by increased parasympathetic activity and overall variability, thus highlighting the clinical usefulness of this type of training.

Evaluation of the Rural Human Settlement in Shandong Province

Taking Shandong Province as the research object,this paper uses the principal component analysis method to evaluate the status of the rural human settlement in Shandong Province.It establishes the evaluation index system of the rural residential environment in Shandong Province,including living environment,economy,infrastructure,public service facilities,and ecological environment,in total five comprehensive index,and 20 secondary indexes.Through measurement and sorting of rural human environment development level of Shandong Province in 2010,the 17 cities are divided into-excellent,good,ordinary,poor-four development areas and are analyzed based on the restriction factor in the development of the region.

电压互感器超差对变压器损耗的影响研究

通过对都匀电网各变电站主变变损的统计、分析,探讨了影响主变变损异常的主要因素,对变损指标明显异常的110 kV荔波变电站电能计量回路实施了改造,达到了预期效果,确保准确计量。

A Research on the Third-Party Legislative Post-Assessment in China

With the formation of the socialist legal system with Chinese characteristics, China pays more attention to the scientificity and the quality of legislation, starting the assessment of the effect of implementation of the law after legislation conducted by an independent third-party institution with scientific methods. The third-party legislative post-assessment can overcome the drawbacks of self-assessment, realizing the public participation better, which makes results of the assessment more objective, neutral and fair. The neutrality of assessment and scientificity of the method should be adhered in the construction of third-party legislative post-assessment in China, while improving public participation as well as the assessment indicators system and quality control system with the introduction of specific legal norms.