Multi-level Grey Evaluation Method Research Articles

A study of the teacher-student interaction in a flipped classroom of college oral English based on mobile learning

In order to solve the problem of low analysis accuracy in the traditional method of interactive effect analysis of English spoken in classrooms in colleges and universities, a mobile learning-based method of the interactive effect analysis of spoken English is proposed. By analysing the characteristics of teacher-student interaction in a flipped classroom, a mobile learning app was constructed. To obtain the relevant information about the teacher-student interaction effect, an evaluation system of the teacher-student interaction in a college English-flipped classroom based on mobile learning was established. Combined with the fuzzy comprehensive evaluation method and multi-level gray evaluation method, the interactive effect of flipped classroom in college English-speaking was analysed according to the evaluation results. The experimental results show that the accuracy of the proposed method is up to about 99%, and the analysis time is about 4 s.

Synthetic Evaluation of Natural Gas Pipeline Operation Schemes Based on the Multi-level Grey Cluster Decision Method

In this paper, a multi-level grey cluster decision method is proposed for the synthetic evaluation of operation schemes of natural gas pipelines with inexact data and insufficient information. A four-level index system is built as the synthetic evaluation criterion, aiming in balancing transmission volume, economic profit, and safety of the pipeline. The analytic hierarchy process (AHP) method is applied to calculate the weights of indexes. In order to assess the pipeline’s operation schemes with multi-level index, the principle of AHP method and the conventional grey cluster decision method are incorporated into a new multi-level grey evaluation method. The essential procedures of the method are illustrated in details, including computations of the grey class, whitenization weight function, decision coefficient matrix, weighted normalized decision coefficient matrix and synthetic evaluation score. Finally, this method is applied to seven operation schemes of Se–Ning–Lan gas pipeline in China. The results demonstrate that synthetic prior order of each scheme is not dependent on any one evaluation index, but on the comprehensive performance of the transmission volume, economic profit and pipeline safety. The application proves that the pipeline’s operation schemes can be reasonably evaluated even if insufficient data are used. The achievement of this paper provides a new analytical method as well as a powerful tool for the synthetic evaluation of operation schemes for natural gas pipelines.

Evaluating Brownfield Redevelopment using an Modified Multilevel Grey Method - A Case Study of Xi’an

A novel multiple criteria decision analysis (MCDA) method is designed for comparing and ranking resolution solutions to a brownfield redevelopment project. In particular, an MCDA technique called the modified multilevel grey evaluation method is developed using concepts from grey systems theory, entropy and the analytical hierarchical process (AHP). To obtain weights for the range of criteria and sub-criteria used to assess and compare the resolution solutions, results obtained using AHP and an entropy technique are combined. In order to reflect uncertainty in the evaluation scores of the resolutions according to the sub-criteria, a grey systems class is employed to appropriately transform the scores. Subsequently, the evaluation method for the resolutions along with the combined weights is used to rank the resolutions. To demonstrate how this new methodology can be conveniently used in practice and provide valuable insights for aiding decision making, it is applied to a brownfield site in Xi’an, China, created by a former chemical factory.

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.

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.

Evaluation on Core Competitiveness of Construction Enterprise Based on Multi-Level Gray Evaluation Method

The core competitive index system is proposed from construction enterprises characteristics. Due to fuzzy characteristics of core competitive index, a multi-level gray evaluation model is established for construction enterprises. And the effectiveness of this model is illustrated by an example.

Research on Handling the Conflict of Project Resource Based on Multi-Level Grey Comprehensive Evaluation Method

Research on frequent resource conflict in project-driven enterprises to establish the evaluation index system by integrating multiple evaluation rules of project activities, and evaluate two or more activities or tasks in the resource conflict by the multi-level grey comprehensive evaluation method, in which the one that has the highest evaluation value will be given priority to use the resource. The use of specific examples shows that it is practicable to tackle with the resource conflict of the enterprise.

Study of Cushioned Package Assessment via Multilevel Grey Evaluation Method

Six steps for cushioned package development based on the fragility theory are limited in the packaging cost and environmental protection. The author considered synthetically various cushioned packaging design relevant factors and built an assessment model of cushioned package based on multilevel grey evaluation method. By using this model, the author quantized the assessment process, and made it easier to be manipulated. The results of the comprehensive evaluation will be objective and scientific. The model can be widely used in cushioned package scheme optimization.

The Evaluating Method for Module Partition Schemes of Complex Product Systems

Module partition of Complex product system (CoPS) usually produces a number of schemes, and how to choose the best one amongst the themes is very important. In this research, according to the features of CoPS, the multi-level evaluation indexes are built based on the DFX (design for X) method, which can evaluate the scheme comprehensively. The weight of indexes are obtained with the method of analytical network process. Then, the multi-level grey fuzzy comprehensive evaluation method is proposed to make the well-chosen decision based on the DFX multi-objective evaluation model. The evaluation method are illustrated using the partition schemes of the experiment platform of a bevel gearbox.