Application of Fuzzy Set Theory to Evaluate Large Scale Transport Infrastructure Risk Assessment and Application of Best Practices for Risk Management

Author(s):  
B. Abeysekara
1996 ◽  
Vol 118 (1) ◽  
pp. 121-124 ◽  
Author(s):  
S. Quin ◽  
G. E. O. Widera

Of the quantitative approaches applied to inservice inspection, failure modes, effects,criticality analysis (FMECA) methodology is recommended. FMECA can provide a straightforward illustration of how risk can be used to prioritize components for inspection (ASME, 1991). But, at present, it has two limitations. One is that it cannot be used in the situation where components have multiple failure modes. The other is that it cannot be used in the situation where the uncertainties in the data of components have nonuniform distributions. In engineering practice, these two situations exist in many cases. In this paper, two methods based on fuzzy set theory are presented to treat these problems. The methods proposed here can be considered as a supplement to FMECA, thus extending its range of applicability.


2013 ◽  
Vol 13 (21) ◽  
pp. 4819-4825 ◽  
Author(s):  
Guang-Rong Li ◽  
Chun-He Li ◽  
Xiu-Hong Niu ◽  
Li-Ping Yang

2018 ◽  
Vol 22 (8) ◽  
pp. 2714-2725 ◽  
Author(s):  
Cenk Budayan ◽  
Irem Dikmen ◽  
M. Talat Birgonul ◽  
Aydın Ghaziani

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Alakananda Chakraborty ◽  
Muskan Jindal ◽  
Mohammad R. Khosravi ◽  
Prabhishek Singh ◽  
Achyut Shankar ◽  
...  

With the growing emergence of the Internet connectivity in this era of Gen Z, several IoT solutions have come into existence for exchanging large scale of data securely, backed up by their own unique cloud service providers (CSPs). It has, therefore, generated the need for customers to decide the IoT cloud platform to suit their vivid and volatile demands in terms of attributes like security and privacy of data, performance efficiency, cost optimization, and other individualistic properties as per unique user. In spite of the existence of many software solutions for this decision-making problem, they have been proved to be inadequate considering the distinct attributes unique to individual user. This paper proposes a framework to represent the selection of IoT cloud platform as a MCDM problem, thereby providing a solution of optimal efficacy with a particular focus in user-specific priorities to create a unique solution for volatile user demands and agile market trends and needs using optimized distance-based approach (DBA) aided by Fuzzy Set Theory.


2021 ◽  
Vol 21 (2) ◽  
pp. 823-835
Author(s):  
Huijun Li ◽  
Lin Zhu ◽  
Gaoxuan Guo ◽  
Yan Zhang ◽  
Zhenxue Dai ◽  
...  

Abstract. Land subsidence caused by groundwater overpumping threatens the sustainable development in Beijing. Hazard assessments of land subsidence can provide early warning information to improve prevention measures. However, uncertainty and fuzziness are the major issues during hazard assessments of land subsidence. We propose a method that integrates fuzzy set theory and weighted Bayesian model (FWBM) to evaluate the hazard probability of land subsidence measured by Interferometric Synthetic Aperture Radar (InSAR) technology. The model is structured as a directed acyclic graph. The hazard probability distribution of each factor triggering land subsidence is determined using Bayes' theorem. Fuzzification of the factor significance reduces the ambiguity of the relationship between the factors and subsidence. The probability of land subsidence hazard under multiple factors is then calculated with the FWBM. The subsidence time series obtained by InSAR is used to infer the updated posterior probability. The upper and middle parts of the Chaobai River alluvial fan are taken as a case-study site, which locates the first large-scale emergency groundwater resource region in the Beijing plain. The results show that rates of groundwater level decrease more than 1 m yr−1 in the confined and unconfined aquifers, with cumulative thicknesses of the compressible sediments between 160 and 170 m and Quaternary thicknesses between 400 and 500 m, yielding maximum hazard probabilities of 0.65, 0.68, 0.32, and 0.35, respectively. The overall hazard probability of land subsidence in the study area decreased from 51.3 % to 28.3 % between 2003 and 2017 due to lower rates of groundwater level decrease. This study provides useful insights for decision makers to select different approaches for land subsidence prevention.


Author(s):  
Lidiia Horoshkova ◽  
Vladimir Volkov ◽  
Іevhen Khlobystov

Actuality of research theme. Nowadays conditions of implementation of administrative-territorial reform on the basis of decentralization, the problem of forming a methodology of decision-making taking into account the specifics of the processes taking place in the country becomes especially relevant. After all, the future of Ukrainian society depends on the success of the decisions made in the process of implementing the reforms of the state socio-economic management and the restructuring of the territorial organization of the business entities on the basis of decentralization. Problem statement. For providing of efficiency of reformation of territorial organization of management and administrative-territorial device new models, instruments and mechanisms of management and making decision, which will provide steady development of territories, regions and state, on the whole, are needed in Ukraine. For this reason, there is a necessity of perfection of methodology of making decision on principles of risk management, which will allow maximally to take into account the specific of process of decentralization of power and provide harmonious and effective combination of interests of the interested parties. Analysis of the last researches and publications. Such scientists are engaged in the modern aspects of decision of problems of decentralization and reformation of administrative-territorial device in a country, as Pavliuk A. P., Oliinyk D. I., Batalov O. A., Datsko O. I., Murkovych L. L., Molodozhen Yu. B. and other [1-4]. The results of own researches of problem are in to [5-11]. Selection of unexplored parts of general issue. The question of process control of decentralization on the basis of acceptance of effective decisions needs the special attention and deep both theoretical and practical, researches. Consequently there is a requirement in development of methodology of concordance, making and estimation of decisions, in the conditions of vagueness and risk of origin of negative events and circumstances which are stipulated the national specific of decentralization. Task statement, research aim. By the above-mentioned circumstances the predefined expedience of forming of methodology of risk-management naturally-economic systems on the example of the incorporated territorial societies. Method or methodology of realization of research. In the process of realization researches drawn on scientific (analysis and synthesis, induction and deduction, analytical grouping) and special (abstracting, economical-mathematical design, etc.) methods of study of the economic phenomena and processes. Exposition of basic material (job performances). It is in-process well-proven that risk-management naturally-economic systems to the number of which the united territorial communities (OTСs) belong, must take into account their specific. It is predefined that in practice of evaluation of the economic phenomena and processes in naturally-economic systems of the use of traditional methods it is not always possible. The use of tool of fuzzy set theory is for this reason offered. It is shown that the search of optimum mechanisms of adjusting of investment processes at regional level remains an urgent necessity. Above all things it touches territorial societies, as traditional mechanisms of management investment resources, as practice shows, do not provide necessary efficiency. Well-proven expedience for the estimation of the real investment projects which are offered the incorporated territorial societies, to use the mathematical vehicle of fuzzy set theory, when experts can estimate certain part of parameters of project. It is set that in the modern terms of reformation of administrative-territorial device and decentralization of power in Ukraine need the special attention of problem of management a housing-municipal services, as his maintenance is provided by local public authorities and created in the process of reformation the united territorial communities (OTСs). It is suggested to use the theory of fuzzy set theory at the estimation of quality of housing-municipal services. Conclusions. In-process the well-proven expedience of development of new tool of acceptance and estimation of decisions is taking into account the features of process of decentralization of power in Ukraine. It is set that the use of mathematical vehicle of fuzzy set theory is in relation to the estimation of investment projects, will be instrumental in the increase of authenticity of prognosis calculations in relation to economic and social efficiency of the programs and projects of management territories. The well-proven expedience of the use of fuzzy set theory for the estimation of quality of housing-municipal services. It will allow to take into account simultaneously quantitative and high-quality indexes that will be instrumental in the increase of level of efficiency of functioning of housing-municipal services in the united territorial communities.


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