scholarly journals Risk Assessment of Shunting Derailment Based on Coupling

Symmetry ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1359 ◽  
Author(s):  
Zhang ◽  
Sun
Keyword(s):  
Risk Assessment ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Analytic Network Process ◽  
Nonlinear Coupling ◽  
Relative Importance ◽  
Risk Aggregation ◽  
Network Process ◽  
Assessment Techniques ◽  
Risk Magnitude

Shunting operation is risky and complex because of the nonlinear coupling effect of personnel, equipment, environment and management, which reflects symmetry, can easily cause shunting derailment accidents. Traditional railway safety risk assessment techniques seldom consider the nonlinear coupling relationships of hazard factors in the shunting process. The Decision Making Trial and Evaluation Laboratory (DEMATEL) and Analytic Network Process (ANP), which are applicable to the coupling analysis of complex systems, have been used in many areas to overcome this shortcoming. Thus, this paper built a hybrid model, developed by integrating DEMATEL and ANP methodologies, to determine the multifarious interdependencies’ relative strengths among the hazard factors and to assess the relative importance of the hazard factors with Super Decision (SD) software. By constructing the "frequency-consequence-vulnerability" three-dimensional risk parameter model, the risk magnitude of shunting derailment could be obtained through risk aggregation process. Finally, the model was applied to the risk assessment of shunting derailment in Huangyangcheng station, the results revealed that this model was effective and efficient, which could yield more reliable and realistic solutions to the shunting safety.

scholarly journals Research on Optimization of VR Welding Course Development with ANP and Satisfaction Evaluation

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1673
Author(s):  
Chih-chao Chung ◽  
Chun-Chun Tung ◽  
Shi-Jer Lou
Keyword(s):  
First Grade ◽  
Analytic Network Process ◽  
Course Development ◽  
Relative Importance ◽  
Experimental Teaching ◽  
Fuzzy Delphi ◽  
Network Process ◽  
Satisfaction Evaluation ◽  
Group Interviews ◽  
Efficient Learning

The purpose of this study is to explore the ability indices of VR (virtual reality) technology when it is applied to assist the teaching of a welding practice course, develop a VR welding course as the basis of course planning and teaching design, and implement experimental teaching to verify its effectiveness. On the basis of a literature review and focus group interviews, initial ability indices of a VR welding course were proposed. Then, 15 experts from VR- and welding-related specialties were invited to form a consulting team to determine “the ability indices of the VR welding course” according to the results of a Fuzzy Delphi expert questionnaire. Moreover, the results of an ANP (Analytic Network Process) expert questionnaire were used to understand the relative importance of the ability indices of the VR welding course, as well as the relative feasibility of VR-assisted welding teaching, in order to develop a “VR welding course”, in which 34 first-grade students of the welding practice course were taken as the research objects during the implementation of experimental teaching. The qualitative research and analysis results are as follows: (1) the VR welding course includes 8 ability indices and 30 evaluation indices; (2) the item with the highest feasibility in VR-assisted welding teaching is “welding construction”, followed by “map reading and drawing”; (3) best feasibility of VR technology “Interaction” in assisting welding teaching; (4) the relative importance of the ability indices of the VR welding course is the greatest for “welding construction”, followed by “welding inspection”; (5) the VR welding course students express significant positive responses to the learning of ability indices and ability demonstration; (6) the majority of students express significant positive learning satisfaction with VR-assisted welding course teaching. This study puts forward a set of rigorous models for the construction of ability indices for a VR course and course development. It can provide a reference for introducing VR-assisted teaching to related welding courses that are run by universities of science and technology in Taiwan. Furthermore, such VR courses can offer students a safe, diversified, and efficient learning environment.

scholarly journals USING FUZZY ANALYTIC NETWORK PROCESS AND ISM METHODS FOR RISK ASSESSMENT OF PUBLIC-PRIVATE PARTNERSHIP: A CHINA PERSPECTIVE

2019 ◽  
Vol 25 (2) ◽  
pp. 168-183 ◽  
Author(s):  
Yan Li ◽  
Xinyu Wang
Keyword(s):  
Risk Factors ◽  
Risk Assessment ◽  
Assessment Tool ◽  
Analytic Network Process ◽  
Interest Rate Risk ◽  
Public Private Partnership ◽  
Interpretive Structural Modeling ◽  
Private Partnership ◽  
Network Process ◽  
Fuzzy Analytic Network Process

The public-private partnership (PPP) has been adopted globally to meet intensifying demands for public facilities and services. However, PPP projects contain a variety of risks which may lead to project failure. Many researchers have explored risk factors associated with PPP projects in developing countries. However, these investigations have limited their aim to understanding risk impact without considering the interactions of these factors. Hence, to fill this gap, this study proposes a risk assessment method, addressing vital interrelationships and interdependencies. Two methodologies, fuzzy analytic network process (F-ANP) and interpretive structural modeling (ISM), were applied to avoid vagueness and data inaccuracies. The primary contributions of this paper were considering the relationships among risk factors and risk priority; and offering a risk analysis approach based on linguistic scales and fuzzy numbers to reflect different neutral, optimistic and pessimistic viewpoints from expert respondents’ judgments. Results from this analysis showed that legal and policy risk was the most influential and interdependent risk, and interest rate risk was the most essential risk in Chinese PPP projects. The ISM structure diagram demonstrated that most of 35 identified risk factors had high driving and dependence power. This study proposed a systematic and practical method to identify and assess PPP risk factors, utilizing an integrated approach consisting of F-ANP and ISM, which has not been used for risk assessment in the construction field. This paper provides a new risk assessment tool and a basis for risk management strategies in the construction engineering and management field.

scholarly journals A new framework for warehouse assessment using a Genetic-Algorithm driven analytic network process

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0256999
Author(s):  
Wafa’ H. AlAlaween ◽  
Abdallah H. AlAlawin ◽  
Mahdi Mahfouf ◽  
Omar H. Abdallah ◽  
‎Mohammad A. Shbool ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Analytic Network Process ◽  
Pairwise Comparisons ◽  
Competitive Advantages ◽  
Relative Importance ◽  
Network Process ◽  
New Framework

A novel way of integrating the genetic algorithm (GA) and the analytic network process (ANP) is presented in this paper in order to develop a new warehouse assessment scheme, which is developed through various stages. First, we define the main criteria that influence a warehouse performance. The proposed algorithm that integrates the GA with the ANP is then utilized to determine the relative importance values of the defined criteria and sub-criteria by considering the interrelationships among them, and assign strength values for such interrelationships. Such an algorithm is also employed to linguistically present the relative importance and the strength of the interrelationships in a way that can circumvent the use of pairwise comparisons. Finally, the audit checklist that consists of questions related to the criteria is integrated with the proposed algorithm for the development of the warehouse assessment scheme. Validated on 45 warehouses, the proposed scheme has been shown to be able to identify the warehouse competitive advantages and the areas where more improvements can be achieved.

scholarly journals Analytic Network Process for Developing Relative Weight of Wastewater Treatment Technology Selection

2017 ◽  
Vol 11 (5) ◽  
pp. 64 ◽  
Author(s):  
Lazim Abdullah ◽  
Nurul Atiqah Abd Rahman
Keyword(s):  
Wastewater Treatment ◽  
Relative Weight ◽  
Analytic Network Process ◽  
Technology Selection ◽  
Practical Implementation ◽  
Relative Importance ◽  
Treatment Technology ◽  
Importance Weights ◽  
Network Process ◽  
The Many

Selecting the best wastewater treatment (WWT) technology requires a thorough qualitative and quantitative evaluation of multi-dependence criteria. A network based method is one of the many possible techniques that able to handle multi-dependence criteria in the selection. This paper proposes relative importance weights of alternatives in selecting the WWT technology using the analytic network process (ANP) in Terengganu Malaysia. The ANP is applied to establish the relative weights of alternatives based on criteria and sub-criteria that available in the WWT technology selection. Two faculty members attached to a public university and an engineer in Malaysian government agency were interviewed to provide evaluation within the framework of ANP. Inner dependence and outer dependence analysis of ANP are fully utilised to establish relative importance weights of alternatives. The experiment result reveals that the relative importance weights of the three alternatives are 0.3074, 0.2795 and 0.2447. The alternative ‘Composting’ has decided as the most suitable technology in WWT which provides the highest relative importance weight among all the three alternatives. The results would be a great significance for the practical implementation of the WWT technology selection.

A QFD-ANP Method for Supplier Selection with Benefits, Opportunities, Costs and Risks Considerations

2018 ◽  
Vol 17 (03) ◽  
pp. 911-939 ◽  
Author(s):  
Eleonora Bottani ◽  
Piera Centobelli ◽  
Teresa Murino ◽  
Ehsan Shekarian
Keyword(s):  
Sensitivity Analysis ◽  
Supplier Selection ◽  
Quality Function Deployment ◽  
Selection Criteria ◽  
Selection Process ◽  
Analytic Network Process ◽  
Relative Importance ◽  
Purchasing Decisions ◽  
Network Process

This paper presents an original integrated procedure to evaluate and select suppliers for purchasing decisions. The procedure exploits the quality function deployment approach to define the suppliers’ characteristics, coupled with the analytic network process to capture the interrelations among the selection criteria and integrated with a benefits, opportunities, costs and risks (BOCR) analysis. As such, the proposed approach is more structured than the existing methods for supplier selection; in particular, it allows simultaneously to take into account the relevant criteria for supplier selection, to capture the situation in which the decision criteria are somehow dependent on one another and to evaluate the positive and negative aspects of the selection process. By using the proposed approach, companies can derive useful information to guide their partner selection process. An extensive case study is reported to show the application of the model to a selection process of a real Italian company. The application shows that the model is effective in identifying the most suitable supplier; moreover, a detailed sensitivity analysis highlights that the results of the ranking are very robust against possible changes in the relative importance of the BOCR perspectives.

Analysis of the Critical Success Factors for Green Shipping

2015 ◽  
Author(s):  
Jingzheng Ren ◽  
Marie Lützen
Keyword(s):  
Success Factors ◽  
Evaluation Criteria ◽  
Influence Factors ◽  
Analytic Network Process ◽  
Influential Factors ◽  
Relative Importance ◽  
Critical Success ◽  
Strategic Measures ◽  
Network Process ◽  
Global Emissions

Shipping, which is one of the most important transport modes, plays a significant role in international trade, but unfortunately, it also contributes significantly to global emissions. The present study proposes a generic method for establishing a system of evaluation criteria for assessing the greenness of shipping. A system of evaluation criteria that consists of multiple influence factors has been established, and an Analytic Network Process has been used to determine the relative importance of the influential factors and to consider their interdependences and interactions. The results can help stakeholders draft strategic measures that enhance the greenness of the shipping activities.

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