Gray relational analysis based assessment of escalator accident risk in subway station

2021 ◽  
pp. 1-10
Author(s):  
Zhiru Wang ◽  
Min Wang ◽  
Ruyu He ◽  
Ran S. Bhamra ◽  
Lili Yang
Keyword(s):  
Risk Assessment ◽  
Risk Index ◽  
Good Condition ◽  
Gray Relational Analysis ◽  
Subway Station ◽  
Risk Level ◽  
Accident Risk ◽  
Analysis Model ◽  
Assessment Index ◽  
Relational Analysis

In order to better achieve active defense in the escalator risk management, this study based on the vulnerability theory, task driven theory, management error theory, proposed a Gray Relational Analysis (GRA) based fuzzy assessment of escalator accident risk approach. The risk assessment index system of subway station escalator accident was constructed based on the commonness and essence of management defects; the weight of risk index was calculated scientifically and reasonably by using Analytic Hierarchy Process (AHP); escalator accident risk was evaluated by the combination of GRA and Fuzzy approach. The results show that escalator equipment, environment, safety knowledge of riders are all in good condition in the station. However, ‘Maintenance’ of escalator in the Beijing subway station is in an extremely high risk level. The contributions of this studies are: (1) general risk elements analysis model for escalator accidents which enable to compose any risk factor possible to induce escalator accident in subway station; (2) GRA based risk assessment approach can avoid the problem when expend the range to left and right. It can also judge whether the continuous improvement effect of the object is significant by the difference degree of each risk level before and after.

scholarly journals Public Safety Risk Assessment of Power Investment Project Based on Fuzzy Set and DS Evidence Theory

2020 ◽  
Vol 143 ◽  
pp. 02009
Author(s):  
Tai-hua Yang ◽  
Jing Qin ◽  
Zhi-xiang Li
Keyword(s):  
Risk Assessment ◽  
Fuzzy Set ◽  
Public Safety ◽  
Evidence Theory ◽  
Investment Project ◽  
Public Security ◽  
Risk Level ◽  
Security Risk ◽  
Safety Risk ◽  
Assessment Index

In recent years, the international situation has become more and more complex, and the regional conflicts have been escalating, and the risks of overseas public security have been increasing. Based on the four types of public security events, a public safety risk assessment index system of "one belt and one road" electric power investment project is established. Combining the Bayesian network model, and using fuzzy set and DS evidence theory, the public security risk level of the “Belt and Road” countries can be this method has been effectively verified and put forward countermeasures by an example.

scholarly journals Risk Assessment of Boot Hydropower Projects in Nepal Using Fuzzy Logic Approach

2018 ◽  
Vol 3 ◽  
pp. 115
Author(s):  
Pramesh Tripathi ◽  
Santosh Kumar Shrestha
Keyword(s):  
Risk Assessment ◽  
Evaluation System ◽  
Risk Index ◽  
Assessment Method ◽  
Risk Level ◽  
Hydropower Project ◽  
Hydroelectric Project ◽  
Extreme Risk ◽  
Fuzzy Logic Approach ◽  
College Of Engineering

<p>Many Hydropower Projects in Nepal are carried out with insufficient risk assessment because of which time over run or variations are predominant. Many projects are stuck in preconstruction phase and others in construction phase. In this study all possible risks associated with the BOOT Hydropower Project in Nepal were identified and evaluated. Fuzzy rating tool has been used to quantify the risk associated with the BOOT Hydropower Projects in Nepal. It provides a flexible and easily understood way to analyze the project risks.  The relative importance (impact) of risk factors was determined from the survey results. A set of questionnaire was prepared for the survey. The survey was conducted with the experts that have experience in BOOT hydropower projects. From the survey, among the type of risks, Grid Connection / Power Evacuation, Political risk and Geological risk were found to be predominant risk respectively in BOOT hydropower projects in Nepal. The risk assessment method enabled a Risk Index (R) value to be calculated, establishing a 4-grade evaluation system: low risk having R values between 1.17 and 1.69; medium risk, between 1.69 and 2.08; high risk, between 2.08 and 2.47; extreme risk, between 2.47 and 2.78. Applicability of the methodology was tested on a real case hydropower project namely Middle Modi Hydroelectric Project (15.1 MW) which is in construction phase on Modi River in Western Region in Nepal and Madhya Bhotekosi Jalavidyut Company Ltd. (102 MW) which is also in construction phase on Bhotekoshi River in Central Region in Nepal.  The risk analysis method will give investors a more rational basis on which to make decisions and it can prevent cost and schedule overruns. An overall risk index can be used as early indicators of project problems or potential difficulties. Evaluators can keep track to evaluate the current risk level with the progress of investments.</p><p><strong>Journal of Advanced College of Engineering and Management</strong>, Vol. 3, 2017, Page: 115-125</p><p> </p>

Case Analysis of Environmental Risk Assessment for Petrochemical Industry

2013 ◽  
Vol 726-731 ◽  
pp. 1101-1104 ◽  
Author(s):  
Li Na Zheng ◽  
Lin Zhang ◽  
Lei Zhang ◽  
Heng Ming Liu
Keyword(s):  
Risk Assessment ◽  
Petrochemical Industry ◽  
Source Term ◽  
Case Analysis ◽  
Risk Identification ◽  
Risk Level ◽  
Accident Risk ◽  
Refining Unit ◽  
Petrochemical Project ◽  
Term Analysis

In this paper, to explore the risk identification, the source term analysis, the consequences calculations, risk assessment, risk management of petrochemical project, a case analysis was conducted, which is a petrochemical company planned 900,000 tons / year of gasoline refining unit construction project. The results showed that the project spill will not spread to the outside environment, the explosion will cause part of the plant severelydamaged, but the accident risk value is lower, the maximum credible accident on the environment could be caused by the less risk. Risk level of the maximum credible accident is acceptable.

scholarly journals Determining the Risk Level of Heavy Rain Damage by Region in South Korea

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 219
Author(s):  
Jongsung Kim ◽  
Donghyun Kim ◽  
Myungjin Lee ◽  
Heechan Han ◽  
Hung Soo Kim
Keyword(s):  
Risk Assessment ◽  
South Korea ◽  
Risk Index ◽  
National Level ◽  
Heavy Rain ◽  
Quantitative Risk Assessment ◽  
Risk Level ◽  
Disaster Prevention ◽  
Qualitative Risk Assessment ◽  
Regional Risk

For risk assessment, two methods, quantitative risk assessment and qualitative risk assessment, are used. In this study, we identified the regional risk level for a disaster-prevention plan for an overall area at the national level using qualitative risk assessment. To overcome the limitations of previous studies, a heavy rain damage risk index (HDRI) was proposed by clarifying the framework and using the indicator selection principle. Using historical damage data, we also carried out hierarchical cluster analysis to identify the major damage types that were not considered in previous risk-assessment studies. The result of the risk-level analysis revealed that risk levels are relatively high in some cities in South Korea where heavy rain damage occurs frequently or is severe. Five causes of damage were derived from this study—A: landslides, B: river inundation, C: poor drainage in arable areas, D: rapid water velocity, and E: inundation in urban lowlands. Finally, a prevention project was proposed considering regional risk level and damage type in this study. Our results can be used when macroscopically planning mid- to long-term disaster prevention projects.

scholarly journals Ecological Risk Assessment of Soil Heavy Metals and Pesticide Residues in Tea Plantations

Agriculture ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 47 ◽  
Author(s):  
Haifang He ◽  
Longqing Shi ◽  
Guang Yang ◽  
Minsheng You ◽  
Liette Vasseur
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Pesticide Residues ◽  
Risk Index ◽  
First Grade ◽  
Risk Level ◽  
Pollution Indices ◽  
Tea Plantations

Tea plantations have used many synthetic chemicals to ensure performance and control of pests. This has led to increased contamination of soils and reduced tea growth. We assessed the levels of heavy metals, including Cd, Cr, Pb, Cu, Ni, Zn, Hg, As, and pesticide residues, such as HCHs, biphenyl chrysanthemum ester, methamidophos, imidacloprid, permethrin, in the soil of tea plantations of Taiwan, Tibet, Guangdong, and Fujian. The Potential Ecological Risk Index and the Nemerow comprehensive pollution index were used to analyze the data. The results showed that risk indices in Tibet, Guangdong and Fuzhou were considered as moderate ecological harm level. Ecological risk assessment index of Anxi organic and Anxi conventional tea gardens suggested a “low” risk level. The Nemerow comprehensive pollution indices for soil pesticide residues in the tea plantations of Taiwan, Tibet, Anxi organic and Anxi conventional were considered mild. Guangdong and Fuzhou had values suggesting “slight pollution” levels. According to National Soil Environmental Quality Standard (GB15618-1995), soil in tea plantations in Taiwan, Tibet, and Anxi conventional matched the national first grade of soil quality and those from Guangdong, Fuzhou, and Anxi organic tea garden matched the national second grade.

scholarly journals Changes in traffic accident risk degree according to driving workload rate and moderate effect of ego-resilience

2011 ◽  
Vol 24 (1) ◽  
pp. 29-50
Author(s):  
HunHwa Song ◽  
SoonChul Lee
Keyword(s):  
Traffic Accident ◽  
Risk Index ◽  
Distracted Driving ◽  
Risk Level ◽  
Hierarchical Regression ◽  
Rate Variation ◽  
Accident Risk ◽  
Ego Resilience ◽  
Driving Workload ◽  
Moderate Effect

This research was conducted to verify changes in traffic accident risk level according to driving workload rate and the moderate effect of ego-resilience. Several hypotheses were made by considering previous studies, in which the traffic accident risk level measured according to Traffic Accident Risk Index (TARI) and Driving Behavior Determinants (DBD) differed from the driving workload rate. Furthermore, Ego-resilience was also considered as a human factor, which has the moderate effect between workload and TARI, DBD. A total of 260 drivers participated in the survey. The result of the factor analysis revealed that the DBD questionnaire could be divided into five factors (i.e., Impatient Driving, Situational Inadaptability, Distracted Driving, Drunken Driving, and Speed Driving). In order to verify changes in those behaviors according to driving workload rate, variation analysis was conducted. The results revealed that Impatient Driving, Situational Inadaptability, and Distracted Driving had significant relationships with driving workload rate. Moreover, the moderate effect of Ego-resilience related to Situational Inadaptability was verified by hierarchical regression analysis. We expect that the result of this study could be used to develop countermeasures to excessive driving workload.

scholarly journals A study on risk assessment of complex disasters in Busan coast

2021 ◽  
Vol 8 (4) ◽  
pp. 255-265
Author(s):  
Soonmi Hwang ◽  
Hyung-Min Oh ◽  
Soo-Yong Nam ◽  
Tae-Soon Kang
Keyword(s):  
Risk Factors ◽  
Risk Assessment ◽  
Storm Surge ◽  
Disaster Preparedness ◽  
Risk Index ◽  
Maximum Flow ◽  
Assessment Index ◽  
Inundation Depth ◽  
Complex Disasters ◽  
Four Levels

In the vicinity of the coast, there is a risk of complex disasters in which inland flooding, wave overtopping, storm surge, and tsunami occur simultaneously. In order to prepare for such complex disasters, it is necessary to set priorities for disaster preparedness through risk assessment and establish countermeasures. In this study, risk assessment is carried out targeting on Marine city, Centum city, and Millak waterside parks in Busan, where complex disasters have occurred or are likely to occur. For risk assessment, inundation prediction map constructed by the Ministry of Public Administration and Security in consideration of sea level rise, rainfall and storm surge scenarios and authorized data on social and economic risk factors were collected. The socioeconomic risk factors selected are population, basements, buildings, sidewalks, and roads, and the risk criteria for damage targets are set for each risk factors. And it was assessed considering the maximum inundation depth and maximum flow velocity of the inundation prediction map. Weights for each factor were derived through expert questionnaires. The risk assessment index that was finally evaluated by calculating the risk index for each element and applying weights was expressed as a risk map by different colors into four levels of attention, caution, alert and danger.

Research of Factors of Regional Product Quality Based on Gray Relational Analysis

2014 ◽  
Vol 1079-1080 ◽  
pp. 1189-1193
Author(s):  
Shu Bin Wang
Keyword(s):  
Product Quality ◽  
Indicator System ◽  
Gray Relational Analysis ◽  
Analysis Model ◽  
Scoring Method ◽  
Relational Analysis ◽  
Object Of Study ◽  
Regional Product ◽  
Strategic Perspective ◽  
Political Economic

This paper took the regional product quality asthe object of study. Firstly this paper took advantageof PESTEL model tostudy factors of regional product quality from the enterprise external environmentand strategic perspective. Built regional product quality indicator system ofsix aspects from political, economic, social,technological, environment and legal. Then established evaluation modelby gray relational analysis model. The next step is to analyze the variousfactors by expert scoring method. The results can show the influence degree offactors. Scienceand technology spending, Regional GDP are Local fiscal revenue are the topthree important factors. Finally, based on the evaluationresults of the analysis, provided a reference for improving the quality ofregional products.

scholarly journals Conceptual Framework for the Risk Assessment of Hydrological Disasters: A Case from Urumqi, China

2020 ◽  
Vol 165 ◽  
pp. 03049 ◽  
Author(s):  
Xingwei Li ◽  
Hongyu Long
Keyword(s):  
Risk Assessment ◽  
Conceptual Framework ◽  
Risk Index ◽  
Calculation Model ◽  
Disaster Prevention ◽  
Assessment Framework ◽  
Analysis Model ◽  
Related Factors ◽  
Green Development ◽  
Risk Vulnerability

Hydrological disasters have become one of the most serious problems facing regional green development. In order to develop a method suitable for comprehensive assessment of urban hydrological disasters, this paper takes Urumqi, China as the research object, and proposes a conceptual framework. Urumqi is an urban area in the northwest of China, and it is often devastated by hydrological disasters. In combination with urban geographic data and the mathematical calculation model of Urumqi, China, the urban hydrological disasters analysis model of Urumqi is established by using the spatial analysis technology of the Geographic Information System according to the risk index of hydrological disaster. Considering the various related factors, like the hazard risk, vulnerability and exposure of disaster, and disaster environment, the risk assessment framework of hydrological disasters in Urumqi is finally designed. In addition, the framework provides a reference for relevant government agencies to develop disaster prevention and mitigation policies.

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