scholarly journals A farmland immersion evaluation method based on grey clustering

2020 ◽  
Vol 199 ◽  
pp. 00014
Author(s):  
Bin Yan ◽  
Ming Gao ◽  
Zhenwei Gao ◽  
Shengli Yan
Keyword(s):  
Weight Function ◽  
Evaluation Method ◽  
Soil Surface ◽  
Assessment Method ◽  
Observation Point ◽  
Evaluation Index System ◽  
Grey Clustering ◽  
Level Elevation ◽  
Properties Of Soil

As we all know, the degree of farmland immersion is affected by many factors such as soil moisture content, natural pore ratio, saturation, soil lithology and so on. However, the conventional submergence assessment method only uses the relative relationship between the depth of phreatic water and the rising height of capillary water to judge the degree of submergence, which is obviously unreasonable. Therefore, in this paper, a method of farmland immersion evaluation based on trigonometric whiteness weight function grey clustering is proposed. The physical properties of soil, surface soil lithology of vadose zone and groundwater level elevation are included in the evaluation index system, and the degree of submergence is classified, and then the weight function is constructed to determine the degree of submergence hazard of each observation point in the immersion area. Case study shows that the method is reasonable and feasible for farmland immersion evaluation.

scholarly journals Grey Clustering Evaluation for the Cooperation Efficiency of PPP Project: Taking Beijing Metro Line 4 as an Example

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Hui Sun ◽  
Yingzi Liang ◽  
Yuning Wang
Keyword(s):  
Public Sector ◽  
Private Sector ◽  
Evaluation Model ◽  
Evaluation Index System ◽  
The Public ◽  
Clustering Model ◽  
Grey Clustering ◽  
Public Products ◽  
Infrastructure Project

PPP model is an important model which provides public products or services based on the coordination between the public sector and private sector. The implementation of PPP model is helpful for relieving the stress of insufficient funding for public sector and improving the efficiency of resource allocation. Comparing with traditional infrastructure project, PPP project involves many stakeholders, and the cooperation efficiency during the different stakeholders impacts the results of the project directly. Thus, it is important to explore the cooperation efficiency of PPP project. Based on grey clustering model, this paper evaluates the cooperation efficiency of PPP project. An evaluation index system including 36 indexes is established based on the aims and objectives of three stakeholders (public sector, private sector, and passengers). A case study of Beijing Metro Line 4 PPP project is implemented to verify the validity and applicability of the evaluation model. And the results showed that the cooperation efficiency of Beijing Metro Line 4 PPP project is relatively high. The model also provided insights into the shortage of the cooperation efficiency of Beijing Metro Line 4 PPP project. As such, the results can assist all stakeholders in adjusting the cooperation efficiency.

scholarly journals Possible Assessment Method of Green Infrastructure in the Case of Small Town Keszthely, Hungary

Land Science ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. p21
Author(s):  
Vera Iváncsics ◽  
Krisztina Filepné Kovács
Keyword(s):  
Green Infrastructure ◽  
Environmental Planning ◽  
Evaluation Method ◽  
Assessment Method ◽  
Policy Implications ◽  
Current Status ◽  
Field Surveys ◽  
Further Development ◽  
The Eu

Recently the planning of green infrastructure (GI) has become a general practice around metropolis (Paris, München, Budapest, etc). A complex methodology is required that goes beyond the scope of traditional green surface systems. However, there are various policy implications in the EU, the smaller towns are lagging to apply them. The paper presents a potential evaluation method through the case study of Keszthely, HU. As Keszthely at Balaton Riviera, is a popular touristic target of CEE, the environmental planning is an essential part of sustainable development. After a literature analyses of assessment methods of GI and ecosystem services, the aspects of GI have been valued on grade scales, based on field surveys and indicators. The current status of the GI was surveyed which is a base for further development and monitoring activities. The paper introduces the methodology, which contributes to preservation of ecosystems.

Preliminary Study on Indexes and Assessment Method for Power Grid Development Diagnosis

2013 ◽  
Vol 291-294 ◽  
pp. 2217-2221
Author(s):  
Hai Yan Wang ◽  
Wei Li ◽  
Xin Wei Du ◽  
Quan Ming Zhang ◽  
Song Ling Dai ◽  
...  
Keyword(s):  
Index System ◽  
Evaluation Method ◽  
High Efficiency ◽  
Comprehensive Evaluation ◽  
Power Grid ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment Method ◽  
Evaluation Index System ◽  
Grid Security ◽  
Development Evaluation

With integrated consideration of existing research on power grid development evaluation index system and requirements of power grid development diagnosis, a more comprehensive power grid development diagnostic index system is established from five aspects of power grid security and reliability, high efficiency, coordination, economics and social environment and more than 20 indicators. In addition, a new power grid development diagnostic evaluation method based on hierarchical analysis and multi-level fuzzy comprehensive evaluation is proposed in order to diagnose and assess power grid status quo and the actual level of development comprehensively, objectively and systematically ,which will help power grid enterprises conveniently to find the main reason of affecting the power grid and enterprise development and encourage enterprises to continuously improve the targeted improvement measures and the level of grid development.

Large Naval Ship Evaluation Method Attended by Multiple Experts

2014 ◽  
Vol 571-572 ◽  
pp. 299-302
Author(s):  
Yuan Hang Hou ◽  
Jia Ning Zhang ◽  
Chun Bo Zhen
Keyword(s):  
Evaluation Method ◽  
Evaluation Index System ◽  
New Method ◽  
Naval Ship ◽  
Expert’S Opinion ◽  
Numerical Computing ◽  
The Difference ◽  
Multiple Experts ◽  
Evaluation Platform

An integrating, coordinating and optimization for experts’ evaluate opinion method according to naval ship evaluation case study is researched. Ship projects evaluation index system is proposed pointing at large surface naval ship, meanwhile the weights of index of experts’ opinion and ship projects are identified. After combining the actual demand of evaluation with the algorithm, a sequence deviation estimating method is formed for estimating the difference between individual and group opinions. Thus a naval ship evaluation platform is proposed which could integrate, coordinate and optimize expert's opinion effectively. Calculation shows this new method system, which mixed the numerical computing and computer iteration technology together, could meet the actual demand of naval ship evaluation commendably. Not only can it retain each expert's original preference, but also consistent the consulting result rapidly. Thus the new method has great applicability in naval ship evaluating progress, with the ability of solving conflict among the expert group.

scholarly journals Comprehensive Evaluation of Offshore Oilfield Development Plans Based on Grey Clustering Analysis with Cloud Model

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Chao Min ◽  
Guoquan Wen ◽  
Binrui Li ◽  
Xiaochan Zhao
Keyword(s):  
Clustering Analysis ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Cloud Model ◽  
Assessment Method ◽  
Expert Assessment ◽  
Weighting Method ◽  
Grey Clustering ◽  
Development Plans ◽  
Oilfield Development

Taking the development plans of an offshore oilfield as an example, a new comprehensive evaluation method, the improved Grey Clustering Analysis based on the cloud model (GCAC), is presented in this paper, which takes the ambiguity, randomness, and uncertainty of data into account and overcomes the limits of the general methods, such as subjective prejudice and objective randomness. GCAC converts the data of the oilfield development plans into a cloud, which considers the data of fuzziness, randomness, and the relationship between them. The grey membership degree of each development plan is calculated by this cloud model and an improved grey whitened function is presented in this paper. Then the plans are reordered by their grey membership degrees. In order to make more reasonable consideration of the artificial or unartificial uncertainties, GCAC combines the Grey Entropy Weighting method, Analytical Hierarchy Process (AHP), and Expert Assessment method to determine the weights of each level of indexes, which makes the weights more reasonable and reduces the randomness and the fuzziness of data. GCAC can help obtain a better comparison between the development plans. The reliability of this method is verified by the calculation results.

Application of Underground Engineering Fire Safety Evaluation Based on the Fuzzy Comprehensive Evaluation Method

2013 ◽  
Vol 765-767 ◽  
pp. 307-310
Author(s):  
Shan Yu Yan ◽  
Jin Ding
Keyword(s):  
Fire Safety ◽  
Safety Assessment ◽  
Evaluation Method ◽  
Safety Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment Method ◽  
Evaluation Index System ◽  
Fuzzy Evaluation ◽  
Fire Control ◽  
Underground Engineering

In this paper, built fire control safety evaluation index system according to the underground engineering characteristics of fire and introduce a method to determine the weighing values for assessment index. Put fuzzy comprehensive assessment method on underground engineering of fire safety assessment, then use fuzzy mathematics theory build a model of engineering of fire safety assessment fuzzy evaluation, and through the underground engineering design of fire safety assessment, to prove its scientific and effective.

A novel method of risk assessment based on improved AHP-Cloud model for freezing pipe fracture

2021 ◽  
pp. 1-14
Author(s):  
Fuwei Liu ◽  
Yansen Wang
Keyword(s):  
Risk Assessment ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Cloud Model ◽  
Evaluation Model ◽  
Assessment Method ◽  
Evaluation Index System ◽  
Risk Level ◽  
Depth Analysis ◽  
New Research

The freezing pipe fracture can cause freezing wall to thaw and even lead to major accidents such as mine flooding easily, which seriously threatens the safety in construction. Therefore, scientific and effective comprehensive risk assessment for freezing pipe fracture is of great significance. In this work, a risk assessment method is put forward based on improved AHP-Cloud model with 19 evaluation indicators. First, the multi-dimension evaluation index system and evaluation model are established, on the basis of in-depth analysis of the risk factors that may lead to accidents. Second, synthesizing the normalization process and the improved analytic hierarchy process (AHP), the evaluation grade cloud and comprehensive evaluation cloud of freezing pipe fracture can be acquired by using the forward cloud generator. Finally, According to the max-subjection principle and the comprehensive evaluation method, we obtain the risk level of freezing pipe fracture. The model is applied to Yangcun Coal Mine. It has been verified that the risk assessment problem of freezing pipe fracture in freezing sinking can be successfully solved by the model we proposed. Above all, the study offers a new research idea for the risk management of freezing pipe fracture in freeze sinking.

scholarly journals Dynamic risk evaluation method for collapse disasters of drill-and-blast tunnels: a case study

2021 ◽  
Vol 19 (1) ◽  
pp. 309-330
Author(s):  
Bo Wu ◽  
◽  
Weixing Qiu ◽  
Wei Huang ◽  
Guowang Meng ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Cloud Model ◽  
Evaluation Model ◽  
Assessment Method ◽  
Dynamic Evaluation ◽  
Dynamic Risk ◽  
Dynamic Risk Assessment ◽  
Tunnel Collapse ◽  
Rock Tunnels

<abstract> <p>The tunnel collapse is one of the most frequent and harmful geological hazards during the construction of highway rock tunnels. As for reducing the occurrence probability of tunnel collapse, a new dynamic risk assessment methodology for the tunnel collapse was established, which combines the Cloud model (CM), the Membership function, and the Bayesian network (BN). During the preparation phase, tunnel collapse risk factors are identified and an index system is constructed. Then, the proposed novel assessment method is used to evaluate the probability of tunnel collapse risk for on-site construction. The probability of tunnel collapse risk in the dynamic process of construction can provide real-time guidance for tunnel construction. Moreover, a typical case study of the Yutangxi tunnel is performed, which belongs to the Pu-Yan Highway Project (Fujian, China). The results show that the dynamic evaluation model is well validated and applied. The risk value of tunnel collapse in a construction cycle is predicted successfully, and on-site construction is guided to reduce the occurrence of tunnel collapse. Besides, it also proves the feasibility of the dynamic evaluation method and its application potential.</p> </abstract>

scholarly journals Evaluation Method for Winding Performance of Distribution Transformer

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5832
Author(s):  
Chunguang Suo ◽  
Yanan Ren ◽  
Wenbin Zhang ◽  
Yincheng Li ◽  
Yanyun Wang ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Evaluation Method ◽  
Short Circuit ◽  
Assessment Method ◽  
Evaluation Index System ◽  
Impedance Method ◽  
Stable Operation ◽  
Fuzzy Evaluation ◽  
Transformer Winding ◽  
Performance Evaluation Index

In order to ensure the safe and stable operation of a power system, the performance evaluation of transformer windings after a short-circuit test can predict whether the windings are deformed in order to provide a useful reference for the operation and maintenance of the power sector. This paper proposes a method for evaluating the performance of transformer windings in order to improve the overall effectiveness of a winding evaluation. The index data obtained based on a short-circuit impedance method, frequency response method, and oscillation wave method are used in the algorithm proposed in this paper. First, the transformer winding performance evaluation index system is constructed. Second, the weight of each index is determined by analytic hierarchy process, and then the fuzzy comprehensive assessment method is introduced, and the fuzzy evaluation matrix is established, the evaluation results are calculated using the evaluation formula. Finally, the maximum membership principle is used to determine the performance level of the transformer winding on the evaluation results, and the evaluation results of the transformer winding state are obtained. The example shows that the evaluation level of the measured transformer winding performance can be obtained by this method as “good”. Compared with the traditional method, this method can simplify the evaluation while maintaining higher accuracy.

Comprehensive Evaluation Model of Physical Education Based on Grey Clustering Analysis

2017 ◽  
Vol 14 (1) ◽  
pp. 84-88 ◽  
Author(s):  
Hongyu Wu ◽  
Fenglei Li ◽  
Guohua Cheng
Keyword(s):  
Physical Education ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Small Sample ◽  
Evaluation Index System ◽  
Scheme Design ◽  
Grey Clustering ◽  
Implementation Scheme ◽  
Score Method

This paper first introduces the implementation scheme design of the comprehensive evaluation of physical education, and then uses examples to verify the effect of the model constructed in this study, with the application of the traditional evaluation method, namely total score method into the practice to be analysed by comparing with the model of this study. Through practical test, it is obtained that the evaluation index system in this study is basically scientific, reasonable and feasible, and the evaluation result is basically consistent with the actual situation, thus it verifies the conclusion that the model in the case of small sample can ensure the validity of the evaluation results.

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