Grey Evaluation Method Research Articles

Study on Risk Assessment of Highway PPP Project

In recent years, PPP (Public-Private-Partnership) mode has been more and more applied in China's highway construction for financing, but because of its characteristics, the mode has a lot of risks in the process of implementing. This paper established a risk evaluation indexes system of highway PPP project, combined qualitative and quantitative methods legitimately and estimated the risk of Hunan Litan expressway project by using multilevel grey evaluation method, the result proved to be scientific and reliable, so it provide an effective solution for Expressway PPP project risk assessment.

An uncertain programming model for preventive maintenance scheduling

PurposeThe purpose of this paper is to illustrate an uncertain programming model for scheduling of preventive maintenance (PM) actions. The PM scheduling, in which PM actions are performed under fixed intervals, is solved by grey systems theory.Design/methodology/approachThe paper applied the grey evaluation method based on triangular whitenization weight functions which includes two classes: endpoint evaluation method and center-point evaluation method.FindingsTwo methods give the same results based on endpoint and center-point triangular whitenization weight functions. For validation, the results were compared by Cassady’s method.Originality/valueThe scheduling of PM is crucial in reliability and maintenance engineering. Hundreds of parts compose complex machines that require replacement and/or repairing. It is helpful to reduce the outage loss on frequent repair/replacement parts and avoid lack of maintenance of the equipment by controlling the equipment maintenance frequency.

Evaluation of urban green transportation planning based on central point triangle whiten weight function and entropy-AHP

Abstract A new method based on the central point triangle whiten weight function and entropy-AHP is proposed to evaluate the urban green transportation planning. It combines the advantages of both gray evaluation method and entropy-AHP, and takes the first as a central model. To achieve a comprehensive evaluation of urban green transportation planning, a composite model of entropy-AHP is used to determine the weight of each evaluation index, then use the central point triangular whiten weight function to calculate the whiten clustering coefficient of each index and the integrated clustering coefficient. Compared with the original grey clustering evaluation, the method involved in this paper not only overcomes the subjectivity of traditional method in the determination of weight vector, but also improves the scientific level of the evaluation by using a combination of qualitative and quantitative system analysis. Finally, an example of green transportation planning of Suzhou Industrial Park in China is given to verify the effectiveness of the method.

Green building evaluation methodology under ecological view

In terms of policy, the Ministry of Construction has prepared and issued a Guidelines for Green Ecological Residential Area Construction Elements and Technical, China Ecological Residential Technology Evaluation Manual, Environmental Impact Evaluation Law of the People’s Republic of China and other documents; in practice, economically developed areas combined with their own characteristics have carried out green building applications, such as the construction of green ecological district Vanke Langrunyuan, etc. What is worth mentioning is the 2008 “Beijing Green Olympics” and the 2010 “Shanghai Eco Expo” made green building concept deeply rooted in people’s hearts. Although green building has aroused widespread attention among all walks of life, after all green building is still in its initial stage, we need to standardize the evaluation criteria, do further research in order to make green building enter a substantive application stage. Therefore, this study uses multi-level gray evaluation method, qualitative and quantitative combining method to evaluate green building. On the basis of research on the evaluation methods for ecological residence in foreign countries, such as British BREEAM, U.S. LEED, multinational GBTOOL and Chinese ecological residence, we absorb the essence and abandon the defects for the establishment of a green building evaluation under ecological view. In this study, gray comprehensive evaluation indicator is used to evaluate the green performance of building, which can better identify and compare the effectiveness of green buildings, and allow easier promotion and application across the country.

A New Fuzzy Comprehensive Evaluation Method for Priority Design of Column of Vertical Grinding Machine

In order to get a reasonable and effective adaptable structure design solution, fuzzy comprehensive evaluation method was applied to evaluate various schemes synthetically which has adopted the method of data normalization of the grey correlation evaluation method in pre process. Through the integrated calculation, the result of evaluation can be obtained accurately and rapidly from the static and dynamic value of the structures. An example of column of vertical grinding machine improvement design was given to explain the process of evaluation in details. Result of evaluation indicates that this method performs well in operability and practicability and can be used in the practice of product design and development.

Evaluation of coal miners' safety behavior based on AHP-GRAP and MATLAB

Considering the current situation of coal mine, it is needed to take coal miners' safety behavior and coal mine environment into consideration. The coal miners' safety behavior level is considered as the main research object. With the help of the effect mechanism in coal miners' safety research, the human capital investment theory has been carried out and in application. What's more, further research on human capital investment for coal miners' safety should be taken. Considering the subjectivity and uncertainty, more and more coal mine accidents focus on miners' safety behavior. Since the actual problems of coal miners' safety behavior level are concluded, the analytic hierarchy process (AHP) is inserted into gray relating analysis process (GRAP), and at the same time, the software tool of MATLAB and the theory of matrix are used to check the strict consistency. Taking a case of coal mine in Anhui Province as an example, the model of coal miners' safety behavior based on multi-hierarchical grey evaluation method is constructed and then verified. The results show that the largest impact on miners' safety behavior is coal miners' safety incentive level, there is no doubt that this method provides scientific reference for the evaluation problem of coal miners' safety behavior level.

Comprehensive Evaluation of Entropy-hierarchical Grey Correlation Analysis for Highway Safety Life Protection Engineering

Different highway safety life protection engineering decision-making have important meaning. The achieving goals and optimal highway safety life protection engineering scheme can not only improve the function of the highway facilities and service level, still can reduce the traffic accident, which caused by the imperfect highway facilities. Different highway safety life protection engineering decision-making is a multiple targets, multi-layers and multi-schemes system evaluation problem. With regard to lack of concrete data on multiple targets, multi-layers and multi-schemes system evaluation problem, make analytical hierarchy process combined with the entropy value analysis into the grey relational comprehensive evaluation method, and then get entropy-hierarchical grey correlation analysis method. This method is a qualitative and quantitative decision method, which combine comparison principle of analytic hierarchy process (AHP) and the entropy principle of entropy value analysis method to determine the relative weight of various indexes between factors layer-by-layer. Then using grey relational analysis by low-layer to high-layer step by step in the possible scheme and referenced scheme. Finally, calculating the comprehensive correlation degree between the possible scheme and referenced scheme, the best plan which has maximum grey correlation degree can be selected.

Gray Comprehensive Evaluation Method on Coal Seam Water Injection in Order of Difficulty

In order to evaluate the coal mine water injection accurately, the gray comprehensive evaluation is applied in this paper, the depth of coal seam, the development degree of coal seam crack, porosity, gas pressure in coal seam, wetting edge of coal, firmness coefficient of coal are chosen as the main index to evaluate the method of water injection into coal mine. The results show that the gray comprehensive evaluation model has a relatively high reliability and accuracy, which can be used to predict the difficulty degree of water injection.

Evaluation of the Modernization of Hydraulic Projects Management Compact-Center-Point Triangular Whitenization Weight Function

In the actual analysis of grey clustering evaluation, it has been found that the length of the grey clustering interval is partially larger, which is determined by the method of grey clustering evaluation based on the center-point triangular whitenization weight function. In order to solve this problem, a new grey evaluation method based on reformative triangular whitenization weight function is researched. The existing end-point triangular whitenization weight function and center-point triangular whitenization weight function are revised, and a new compact-center-point triangular whitenization weight function is constructed. Then the rules for grey category intervalof the three triangular whitenization weight functions are compared, and an example about the evaluation of the modernization of hydraulic projects management is proposed for analyzing the three methods to further verify that the improved grey clustering evaluation method based on the compact-center-point triangular whitenization weight function is feasible and effective. The results show that the compact-center-point triangular whitenization weight function is superior to both the end-point triangular whitenization weight function and the center-point triangular whitenization weight function.

Evaluation of scheduling using triangular whitenization functions

Purpose – The time required for a certain task to be performed normally reduces on its frequent completion, as more units are produced over time, it is expected to have an increase in the total worker’s output performance. Learning curve (LC) is a mathematical representation to estimate the time of tasks which occurs repeatedly. The parameter prediction is considered a major disadvantage from which LC suffers. The purpose of this paper is to investigate grey systems theory as a method for the standard time. Design/methodology/approach – The proposed method starts with data which are obtained by traditional time study and then, models LC for an assembling activity of Electrogen Company. The paper studies the grey evaluation method based on triangular whitenization weight functions which includes two classes: endpoint triangular whitenization functions and center-point triangular whitenization functions. The grey system results are compared with those of the LC. Findings – The results show that the standard time given by grey systems theory is closer than the standard time given by LC to standard time with 100 per cent performance level. Originality/value – Scheduling problems are complex and uncertain, and it is very rare for such systems to be exactly determined in all their complexity. According to grey systems theory, the job processing time can be considered as the object that extension is definite but intension is uncertain. Consequently, grey systems theory with its focus on the uncertainty problems of small samples and incomplete information is proposed in the paper.

Development and Application of the Performance Evaluation System for Integrated Supply Chain

According to the definition of integrated supply chain performance, improved method of grey relational evaluation and multi-level dynamic fuzzy comprehensive evaluation method are adopted to comprehensively evaluate the overall performance of the integrated supply chain. Based on these, the Performance Evaluation System (PES) of the integrated supply chain is developed on MATLAB software platform. In the end, the validity and feasibility of the system is validated by an example, and the system can provide a convenient operation tool and scientific, objective decision basis for managers to evaluate the integrated supply chain performance.

Research on the Choice of District Resolves Solution of Chinese Railway Reform and Restructuring

This paper, using the hierarchical cluster analysis and the gray scale comprehensive evaluation method, considering operating balance scale of regional companies, the proportion of inter-regional exchange of goods, compares the pros and cons of each division scheme and we find that seven regional companies is the most suitable for railway development.

Based on Grey Correlation Theory of the Eastern Region Industrial Economic Efficiency Evaluation and Analysis

Set up an industrial economic benefit evaluation index system, including three level indexes, 8 secondary index, using the grey comprehensive evaluation method of industrial economic benefits in east China empirically measure and analysis. By analysis of the eastern provinces of the comprehensive ranking, according to the result of evaluation and comparison, we found out the eastern region economic level is uneven. Then, put forward the proposal to the development of eastern industrial economy.

Optimum harvest study of Gentiana crassicaulis in Ludian

The paper is aimed to study the difference in yield and quality at different harvest time and determine the optimum harvest of planting Gentiana in Ludian traditional harvest period. The authors analyzed the variation in fresh weight, dry weight, dry discount rate, length, diameter, volume and the content of gentiopicroside, loganin acid, alcohol-soluble extract and total ash and made a comprehensive appraisal of yield, appearance quality and intrinsic quality by gray relational distance ideal Comprehensive Evaluation method. The results showed that there is a big difference in yield and quality both 2-year-old and 3-year-old Gentiana harvested in traditional harvest period and the comprehensive evaluation more better when harvested more later. It can be seen, Gentiana harvested the later had a better yield and quality in Ludian traditional harvest period. The harvest of Gentiana can be appropriate delayed depending on the particular circumstances of production.

Study on the Evaluation Index System and Evaluation Method for the Building Energy-Saving and Green Building Demonstration Zone

this paper referred to the existing green building assessment system at home and abroad, and combined with China's specific national conditions, then constructed evaluation index system of energy-saving and green building demonstration zone from eight aspects including section, water saving, energy saving, material saving, environmental protection, renewable energy utilization, demonstration area planning and operational management. At the same time, the green building demonstration area three-star evaluation standard was put forward. Besides, this paper introduced analytic hierarchy process and grey comprehensive evaluation method, and combined with the instance su qian lakeside newtown to carry out a full green evaluation by using the proposed index system and evaluation method. Considering the research on green demonstration area in China is not yet mature, this paper research on the development and promotion of energy saving buildings in China has great reference value.

Design of the Whole Life-Cycle Information Management Mechanism of Project

Corporate faces problems such as resource limitation and conflicts, information deficiency and that the project document management fails to meet the company’s requirements, and so on, in order to solve these problems. This paper emphasizes the importance of managing projects by stages, studies and tries to design the lifecycle model of project management. Also, using multi-hierarchy grey comprehensive evaluation method, this paper evaluates and compares the project activities which have resource conflicts. The application of the system in practical project management verifies the efficiency of the research method discussed in this paper.

A new method for evaluating tour online review based on grey 2-tuple linguistic

Purpose – Tour social network data that are heterogeneous contain not only the quantitative structured evaluation data, but also the qualitative non-structured data. This is a big data scenario. How to evaluate tour online review and then recommend to potential tourists quickly and accurately are important parts of social responsibility of tour companies. The purpose of this paper is to propose a new method for evaluating tour online review based on grey 2-tuple linguistic. Design/methodology/approach – The phenomenon of “poor information” exists in some big data scenario. According to social responsibility, grey 2-tuple linguistic evaluation model for tour online review is proposed. Findings – Tour social networks contain data that are valuable to each individual on tourism industry's value chain. Grey 2-tuple linguistic evaluation model can be used for evaluating tour online reviews. This is a systems thinking method that takes social responsibility into account. Research limitations/implications – Due to the complex links among reviewers in social network, network mining approaches and models are expected to be added to this research in the near future. Practical implications – Grey 2-tuple linguistic evaluation method can contribute to the future research on evaluating a variety of tour social network comment data in the real world. Originality/value – A new evaluation method for making evaluation and recommendations based on tour social network comment information is proposed.

Grey evaluation empirical study based on center-point triangular whitenization weight function of Jiangsu Province industrial technology innovation strategy alliance

Purpose– This paper aims to investigate the performance of Jiangsu Province industrial technology innovation strategy alliance.Design/methodology/approach– Through a preliminary investigation of 30 Jiangsu industrial technology innovation strategic alliances, this paper analyzed the status and extracted 18 alliances to conduct an in-depth investigation. By grey evaluation method based on center-point triangular whitenization weight function, the paper classified and analyzed alliances.Findings– The results show that university or research institutions-oriented alliance perform better, but the government/enterprise-oriented alliance perform diverse, and majority is rated “general”.Originality/value– The paper succeeds in clustering analysis to Jiangsu Province industrial technology innovation strategy alliance with insufficient data. And according to the result of clustering, it analyzes the causes, which provide value information for the sustainable development of Jiangsu Province industrial technology innovation strategy alliance.

北京农户叶类蔬菜营销渠道绩效评价

评价北京农户的叶类蔬菜渠道绩效时，首先建立相应评价指标体系；其次通过层次分析法建立多阶层次分析模型并计算影响绩效的各因素指标权重，同时基于三角白化权函数的灰色评估方法，评估渠道各层次指标，得到相应渠道绩效的等级和综合评价值。定量评价结论是：“农户 + 企业或合作社”模式的渠道绩效最高，其次是“农户 + 产地集贸市场”和“农户 + 产地收购商”。“农户 + 批发市场”模式的渠道绩效最低，不适于农户进行叶类蔬菜的销售。Marketing channel efficiency of leafy vegetables was evaluated in this study. The impact factors of leafy vegetable marketing channel efficiency were identified, and then its corresponding evaluation index system was constructed. An evaluation model for multi-hierarchy process based on AHP was established, and the index weights of various factors were calculated. Meanwhile, on the basis of grey evaluation method of triangular whitening weight function, the indexes of various hierarchies in different channels were evaluated and the level and comprehensive evaluation value of performance of marketing channels efficiency were got. The quantitative evaluation results showed that the mode of “Farmers + enterprise (cooperatives)” achieved the highest channel efficiency and the mode of “Farmers + Wholesale” achieved the lowest channel efficiency. The mode of “Farmers + Wholesale” is unsuitable for farmers selling leafy vegetables.

The Risk Assessment of High-Tech Project Based on Comprehensive Evaluation of Fuzzy and Gray Model

High-tech projects have high risks involving wide range of links, high expense of investment, long period of development and production cycle, complicated operation system, etc. When evaluating the project's risk, a separate gray method or fuzzy theory model is not comprehensive, it should combine the gray method with the fuzzy evaluation model. From the fuzzy evaluation and gray evaluation method the gray clustering statistic could be obtained by use of grey cluster theory. It is necessary to construct fuzzy membership matrix of risk and establish a fuzzy and gray comprehensive evaluation method, and adequately adopt expert's evaluation information of the fuzziness and grayness. Finally, using concrete empirical analysis in aviation armament project risk assessment, the feasibility and the correctness of the model are verified.