Study on Emergency Management of Sudden Water Pollution Accidents

2013 ◽  
Vol 726-731 ◽  
pp. 4142-4145
Author(s):  
Yun Long Zhang ◽  
Qiang Mei
Keyword(s):  
Water Pollution ◽  
Emergency Management ◽  
Group Decision ◽  
Emergency Situation ◽  
Grey System Theory ◽  
Grey System ◽  
Multiple Group ◽  
National Economic ◽  
Prevention And Treatment ◽  
Sudden Water Pollution

China is facing serious environmental pollution problems and the increasingly worsening water pollution as well as frequent sudden water pollution accidents has become the most notable one. Based on theory of risk prediction and group decision, a series of emergency management methods in dealing with sudden water pollution accidents was presented. In which grey system theory was used in the prediction of sudden water pollution accidents and a GM(1,1) model was given. The results gotten from the GM(1,1) model might be useful in improving our ability of the prevention and treatment of emergent accidents. At the same time, the method of multiple group decision-making was used to illustrate the progress of making decision in real-time event of sudden water pollution accidents. This method will help the decision maker make effective decisions under emergency situation which will reduce the probability of risk, minimize losses, and guarantee the national economic and social security.

scholarly journals A New Grey Approach for Using SWARA and PIPRECIA Methods in a Group Decision-Making Environment

Mathematics ◽  
2021 ◽  
Vol 9 (13) ◽  
pp. 1554
Author(s):  
Dragiša Stanujkić ◽  
Darjan Karabašević ◽  
Gabrijela Popović ◽  
Predrag S. Stanimirović ◽  
Muzafer Saračević ◽  
...  
Keyword(s):  
Decision Making ◽  
Group Decision Making ◽  
Group Decision ◽  
Multiple Criteria Decision Making ◽  
Grey System Theory ◽  
Multiple Criteria ◽  
Decision Making Process ◽  
Grey System ◽  
Criteria Weights

The environment in which the decision-making process takes place is often characterized by uncertainty and vagueness and, because of that, sometimes it is very hard to express the criteria weights with crisp numbers. Therefore, the application of the Grey System Theory, i.e., grey numbers, in this case, is very convenient when it comes to determination of the criteria weights with partially known information. Besides, the criteria weights have a significant role in the multiple criteria decision-making process. Many ordinary multiple criteria decision-making methods are adapted for using grey numbers, and this is the case in this article as well. A new grey extension of the certain multiple criteria decision-making methods for the determination of the criteria weights is proposed. Therefore, the article aims to propose a new extension of the Step-wise Weight Assessment Ratio Analysis (SWARA) and PIvot Pairwise Relative Criteria Importance Assessment (PIPRECIA) methods adapted for group decision-making. In the proposed approach, attitudes of decision-makers are transformed into grey group attitudes, which allows taking advantage of the benefit that grey numbers provide over crisp numbers. The main advantage of the proposed approach in relation to the use of crisp numbers is the ability to conduct different analyses, i.e., considering different scenarios, such as pessimistic, optimistic, and so on. By varying the value of the whitening coefficient, different weights of the criteria can be obtained, and it should be emphasized that this approach gives the same weights as in the case of crisp numbers when the whitening coefficient has a value of 0.5. In addition, in this approach, the grey number was formed based on the median value of collected responses because it better maintains the deviation from the normal distribution of the collected responses. The application of the proposed approach was considered through two numerical illustrations, based on which appropriate conclusions were drawn.

scholarly journals Multiple Group Decision Making for Selecting Emergency Alternatives: A Novel Method Based on the LDWPA Operator and LD-MABAC

2020 ◽  
Vol 17 (8) ◽  
pp. 2945 ◽  
Author(s):  
Xia Liang ◽  
Fei Teng ◽  
Yan Sun
Keyword(s):  
Emergency Management ◽  
Group Decision ◽  
Distance Matrix ◽  
Linguistic Terms ◽  
Decision Method ◽  
Multiple Group ◽  
Emergency Event ◽  
Novel Method ◽  
Multiple Groups ◽  
Emergency Decision

When an emergency event occurs, it is critical to respond in the shortest possible time. Therefore, the rationality and effectiveness of emergency decisions are the key links in emergency management. In this paper, with aims to investigate the problem of emergency alternatives selection, in which a large number of experts from multiple groups consider the linguistic evaluations of emergency alternatives and prior orders of criteria, a novel emergency decision method is proposed. First, many experts from multiple subgroups are employed to evaluate the emergency alternatives associated with multiple criteria in the format of linguistic terms. Then, linguistic distribution evaluations for the emergency alternatives of the criteria associated with each subgroup are constructed. With respect to the linguistic distribution evaluations associated with the different subgroups, the linguistic distribution power average (LDPA) and linguistic distribution weighted power average (LDWPA) operators are developed so as to aggregate the subgroups’ evaluations. Next, based on the linguistic distribution multi-attributive border approximation area comparison (LD-MABAC) method, the distance matrix of the emergency alternatives is calculated. Furthermore, the prior weights of the criteria are determined based on the distance values. Finally, the ranking result of the emergency alternatives is derived. A practical example of emergency alternatives selection is adopted to illustrate the availability and practicability of the proposed method.

Evaluation Study of Grounding Grids Based on Gray Clustering

2013 ◽  
Vol 433-435 ◽  
pp. 550-554
Author(s):  
Jiang Xia Cui ◽  
Jing Yi Du
Keyword(s):  
High Reliability ◽  
Emergency Situation ◽  
Evaluation Study ◽  
Grey System Theory ◽  
Grey System ◽  
Safe Operation ◽  
Grounding Grid ◽  
Grey Clustering ◽  
Grounding Grids ◽  
The Relationship

Grounding grid is an important device which ensures the safe operation of substation. Its corrosion is influenced by various factors and the influence of these factors is varied. It is difficult to infer the relationship between the corrosion rate and its influencing factors, so this paper apply the grey clustering method of grey system theory in the grounding grid corrosion and gives an application instance and realizes it by MATLAB. The results demonstrate the practicality and effectiveness of the method mentioned in this paper. This method can provide reference for high reliability for related departments in the implementation of emergency situation due to grounding grid corrosion.

The Prediction for Sewage Emissions in Xi'an Based on the Theory of Grey System

2014 ◽  
Vol 1079-1080 ◽  
pp. 539-542
Author(s):  
Wei Sun ◽  
Xiao Jun Liu
Keyword(s):  
Water Pollution ◽  
System Theory ◽  
Water Scarcity ◽  
Industrial Wastewater ◽  
Domestic Sewage ◽  
Grey System Theory ◽  
Basic Data ◽  
Grey System ◽  
Model Based ◽  
Discharge Volume

The water pollution and water scarcity have restricted the development of economy seriously in Xi'an. And the wastewater quantity is an important basic data in solving this problem. This paper build GM(1,1) model based on grey system theory to predict the discharge volume of urban domestic sewage and industrial wastewater from 2013 to 2020. The predictions suggest that the discharge amount of industrial wastewater will reduce by 6.7005 million tons per year. While the amount of domestic sewage increases year by year at the speed of 11.0989 million tons. The percentage of domestic sewage in total sewage emissions will get bigger in Xi'an. Additionally, some suggestion about improving the efficiency using of water and reducing sewerage discharged are given.

Prediction of Technical Reserves Based on Grey Model — GM(1,1): Evidence from Non-life Egyptian Insurance Market

2019 ◽  
Vol 10 (9) ◽  
pp. 852-860
Author(s):  
Mahmoud Elsayed ◽  
◽  
Amr Soliman ◽  
Keyword(s):  
System Theory ◽  
Grey System Theory ◽  
Insurance Market ◽  
Grey Model ◽  
Loss Ratio ◽  
Grey System ◽  
Mathematical Technique ◽  
Supervisory Authority ◽  
Error Ratio ◽  
Using Data

Grey system theory is a mathematical technique used to predict data with known and unknown characteristics. The aim of our research is to forecast the future amount of technical reserves (outstanding claims reserve, loss ratio fluctuations reserve and unearned premiums reserve) up to 2029/2030. This study applies the Grey Model GM(1,1) using data obtained from the Egyptian Financial Supervisory Authority (EFSA) over the period from 2005/2006 to 2015/2016 for non-life Egyptian insurance market. We found that the predicted amounts of outstanding claims reserve and loss ratio fluctuations reserve are highly significant than the unearned premiums reserve according to the value of Posterior Error Ratio (PER).

scholarly journals Grey Relational Grade Based Quantitative Analysis of the Factors Influencing the Load Characteristics of A Power Grid

2018 ◽  
Vol 53 ◽  
pp. 01012 ◽  
Author(s):  
Wei Pan ◽  
Caijia Lei ◽  
Wei Jia ◽  
Hui Gao ◽  
Binghua Fang
Keyword(s):  
Quantitative Analysis ◽  
Influencing Factors ◽  
Power Grid ◽  
Grey System Theory ◽  
Grey System ◽  
Factors Affecting ◽  
Grey Relational Grade ◽  
Load Characteristics ◽  
Grey Relational ◽  
Main Factor

Regarding analysis of load characteristics of a power grid, there are multiple factors that influence the variation of load characteristics. Among these factors, the influence of different ones on the change of load characteristic is somewhat different, thus the degree of influence of various factors needs to be quantified to distinguish the main and minor factors of load characteristics. Based on this, the grey relational analysis in the grey system theory is employed as the basis of mathematical model in this paper. Firstly, the main factors affecting the load characteristics of a power grid are analysed. Then, the principle of quantitative analysis of the influencing factors by using grey relational grade is introduced. Lastly, the load of Guangzhou power grid is selected as the research object, thereby the main factor of temperature affecting the load characteristics is quantitatively analysed, such that the correlation between temperature and load is established. In this paper, by investigating the influencing factors and the degree of influence of load characteristics, the law of load characteristics changes can be effectively revealed, which is of great significance for power system planning and dispatching operation.

scholarly journals The OpenRadiation project: monitoring radioactivity in the environment by and for the citizens

2019 ◽  
Vol 54 (4) ◽  
pp. 241-246 ◽  
Author(s):  
J.F. Bottollier-Depois ◽  
E. Allain ◽  
G. Baumont ◽  
N. Berthelot ◽  
G. Darley ◽  
...  
Keyword(s):  
Emergency Management ◽  
Dose Rate ◽  
Scientific Community ◽  
Emergency Situation ◽  
Collaborative Approach ◽  
Fukushima Accident ◽  
The Public ◽  
Collaborative Tools ◽  
Share Data ◽  
Project Monitoring

After the Fukushima accident, initiatives emerged offering the public the possibility to realise measurements of the radioactivity in the environment with various devices and to share data and experiences through collaborative tools. The objective of the OpenRadiation project is to offer the public the opportunity to perform measurements of the radioactivity using connected dosimeters on smartphones. The challenge is to operate such a system on a sustainable basis in normal situations and in order to be useful in an emergency situation. In normal situations, this project is based on a collaborative approach including pedagogical activities. In case of emergency situation, data from the field will be available in “real time” providing an opportunity for the emergency management and the communication with the public. The practical objectives are to develop i) a website centralising measurements using various dosimeters, providing dose rate maps with raw and filtered data and offering dedicated areas for specific projects and exchanges about data and ii) a dosimetric app using a connected dosimeter. This project is conducted within a partnership between organisms’ representative of the scientific community and associations to create links with the public.

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