scholarly journals AN EXTENDED SINGLE-VALUED NEUTROSOPHIC AHP AND MULTIMOORA METHOD TO EVALUATE THE OPTIMAL TRAINING AIRCRAFT FOR FLIGHT TRAINING ORGANIZATIONS

2021 ◽  
Vol 19 (3) ◽  
pp. 555
Author(s):  
Çağlar Karamaşa ◽  
Darjan Karabasevic ◽  
Dragisa Stanujkic ◽  
Alireza Rezanezhad Kookhdan ◽  
Arunodaya Raj Mishra ◽  
...  
Keyword(s):  
Flight Training ◽  
Ratio Analysis ◽  
Analytic Hierarchy ◽  
Neutrosophic Sets ◽  
The Stability ◽  
Hierarchy Process ◽  
Survey Approach ◽  
Special Case ◽  
Multimoora Method ◽  
Training Organization

Aircraft’s training is crucial for a flight training organization (FTO). Therefore, an important decision that these organizations should wisely consider the choice of aircraft to be bought among many alternatives. The criteria for evaluating the optimal training aircraft for FTOs are collected based on the survey approach. Single valued neutrosophic sets (SVNS) have the degree of truth, indeterminacy, and falsity membership functions and, as a special case, neutrosophic sets (NS) deal with inconsistent environments. In this regard, this study has extended a single-valued neutrosophic analytic hierarchy process (AHP) based on multi-objective optimization on the basis of ratio analysis plus a full multiplicative form (MULTIMOORA) to rank the training aircraft as the alternatives. Moreover, a sensitivity analysis is performed to demonstrate the stability of the developed method. Finally, a comparison between the results of the developed approach and the existing approaches for validating the developed approach is discussed. This analysis shows that the proposed approach is efficient and with the other methods.

A Novel Approach to Evaluate the Stability of Production Manufacturing System Based on Petri-Net and Analytic Hierarchy Process

2012 ◽  
Vol 605-607 ◽  
pp. 336-340
Author(s):  
Hou Xing You
Keyword(s):  
Analytic Hierarchy Process ◽  
Petri Net ◽  
Manufacturing System ◽  
New Method ◽  
System Stability ◽  
Production Factor ◽  
Analytic Hierarchy ◽  
The Stability ◽  
Whole Life Cycle ◽  
Hierarchy Process

In the whole life cycle of production process, the stability of production manufacturing system is an important production factor. However, there were a few researches about the system stability in the past years. In this paper, for the stability of production manufacturing system, a new method is proposed based on Petri-net and analytic hierarchy process. In the proposed method, the reachability of manufacturing system is judged by using Petri-net, and the system stability is calculated by the successful probability of the key production nodes. Finally, evaluation steps of the new method are given, and the new evaluation method is applied in case study.

Fire Protection Studies on Steel Staggered-Truss Structure Based on Analytic Hierarchy Process

2010 ◽  
Vol 26-28 ◽  
pp. 608-611 ◽  
Author(s):  
Chang Kun Chen ◽  
Dong Zhang
Keyword(s):  
Analytic Hierarchy Process ◽  
Fire Protection ◽  
Design Method ◽  
Fire Retardant ◽  
Comparative Investigation ◽  
Truss Structure ◽  
Analytic Hierarchy ◽  
Protection Method ◽  
The Stability ◽  
Hierarchy Process

A new design method for fire protection, based on analytic hierarchy process (AHP), was put forward, to explore an economic and secure strategy for fire protection of steel staggered-truss structure (SSTS). The chords and web members of SSTS were classified into different important grades by AHP according to the influence which components make on the stability of structure at elevated temperature. And the components are protected by different levels based on the important grades. Furthermore, a comparative investigation was conducted in order to appraise the economic and practical performance of the provided new fire protection method with traditional fire protection. The results indicate that the proposed fire protection strategy for SSTS based on AHP could achieve higher security with the same volume of fire retardant coatings.

scholarly journals Stability Assessment of Deep Three-Soft Outburst Coal Seam Roof Based on Fuzzy Analytic Hierarchy Process

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Qingling Meng ◽  
Yanling Wu ◽  
Minbo Zhang ◽  
Zichao Wang ◽  
Kejiang Lei
Keyword(s):  
Coal Seam ◽  
Analytic Hierarchy Process ◽  
Evaluation Method ◽  
Stability Assessment ◽  
Analytic Hierarchy ◽  
Soft Coal ◽  
Outburst Coal Seam ◽  
The Stability ◽  
Soft Coal Seam ◽  
Hierarchy Process

The stability of deep “three-soft” coal seam roof has always been a key issue in coal mining. There are a lot of factors affecting the stability of deep three-soft coal seam outburst roof. However, there is currently no definite method able to draw an accurate assessment conclusion on roof stability. In order to accurately determine the main influencing factors of the stability of deep three-soft coal seam outburst roof and reduce the loss of coal production, this paper performed three-soft coal seam risk identification on Lugou Mine based on the introduction of the fuzzy analytic hierarchy process theory. 23 main risk factors were identified. Then, it established a hierarchical structure model of coal seam roof stability in accordance with experts’ opinions. The analytic hierarchy process was used to calculate the weights of indicators at all levels. Next, the paper used the fuzzy comprehensive evaluation method and expert scoring to evaluate various risk factors in the indicator system, as well as the overall safety level. The results showed that the deep three-soft coal seam stability of Lugou Mine ranks the third hazard level. The main risk and harmful factors include safety awareness, safety monitoring system, roof weakness, ventilation system, fire-fighting system, and rock bolt quality. In response to the evaluation results, this paper formulated corresponding control measure in terms of ventilation risk, safety monitoring risks, construction personnel risks, and fire protection risk to reduce losses in the mining process, providing a new evaluation method for the stability assessment of deep outburst coal seam roof.

scholarly journals Selection of softwood species for structural and non-structural timber construction by using the analytic hierarchy process (AHP) and the multi-objective optimization on the basis of ratio analysis (MOORA)

2019 ◽  
Vol 25 (2) ◽  
pp. 281-288
Author(s):  
Şükrü Özşahin ◽  
Hilal Singer ◽  
Ali Temiz ◽  
İbrahim Yıldırım
Keyword(s):  
Analytic Hierarchy Process ◽  
Ratio Analysis ◽  
Multi Objective Optimization ◽  
Larix Occidentalis ◽  
Western Larch ◽  
Analytic Hierarchy ◽  
Multi Objective ◽  
Structural Applications ◽  
The Analytic Hierarchy Process ◽  
Hierarchy Process

In this study, the hybrid approach of the analytic hierarchy process (AHP) and the multi-objective optimization on the basis of ratio analysis (MOORA) was used in order to select the most suitable softwood timber for constraction. Douglas fir (Pseudotsuga menziesii), Lodgepole pine (Pinus concorta), Red pine (Pinus resinosa), Redwood (Sequoia sempervirens), Engelmann spruce (Picea engelmannii), Eastern hemlock (Tsuga canadensis), Western larch (Larix occidentalis) and Western redcedar (Thuja plicata) were evaluated in terms of economic, physical, mechanical, thermal and durability properties. According to the results, the most suitable timbers for structural and non-structural applications were determined western larch and redwood, respectively.

scholarly journals Comprehensive Analysis of Stability of Coal Seam Composite Roof Based on Analytic Hierarchy Process

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Xianyu Xiong ◽  
Jun Dai ◽  
Xin Wang
Keyword(s):  
Analytic Hierarchy Process ◽  
Structural Stability ◽  
Bending Strength ◽  
Complex Structure ◽  
Cohesive Force ◽  
Influence Coefficient ◽  
Analytic Hierarchy ◽  
Roof Structure ◽  
The Stability ◽  
Hierarchy Process

The composite roof structure of coal roadway is complex, and its stability is related to lithology of strata, strata thickness, number of strata, strata location, and interlayer cohesive force. Based on a simplified model of the composite roof structure, simulation test, analytic hierarchy process (AHP), and Matlab, programs are employed to comprehensively analyze the structural stability of roofs. The structural stability of the composite roof is demonstrated to decrease with the lithology of strata, strata thickness, and interlayer cohesive force and increase in number of strata and distance of hard-and-thick strata from the roadway. The decreasing order of influence of these factors on the composite roof structure is as follows: lithology of strata, strata thickness, number of strata, strata location, and interlayer cohesive force. Lithology of strata is the main factor affecting stability. The bending strength decreases with the increase in number of strata, and the influence of strata position on stability decreases from the first layer to the fourth layer. According to the AHP, an expression for the comprehensive influence coefficient (k) for the stability of the composite roof structure is proposed, and the surrounding rocks are divided into three levels using this equation: grade I with 0.7 < k < 1 (stable), grade II with 0.4 < k < 0.7 (slightly stable), and grade III with 0 < k < 0.4 (unstable). A scientific basis to evaluate the stability and control of the composite roof of a complex structure is thus provided.

scholarly journals Reasonable Layout of Roadway Based on PSO-AHP Optimization Algorithm Under Three-Dimensional Stress Field

2021 ◽  
Author(s):  
Hongbao Zhao ◽  
Hui Cheng ◽  
Chi Zhang ◽  
Yixiao Zhang
Keyword(s):  
Stress Field ◽  
Optimization Algorithm ◽  
Three Dimensional ◽  
Surrounding Rock ◽  
Deviatoric Stress ◽  
Analytic Hierarchy ◽  
Working Face ◽  
Dip Angle ◽  
The Stability ◽  
Hierarchy Process

Abstract Reasonable roadway layout is the fundamental measure to reduce the difficulty of roadway support and improve the stability of surrounding rock. The particle swarm optimization and analytic hierarchy process (PSO-AHP) algorithm of reasonable layout of roadway under the three-dimensional field was proposed, and an engineering verification was carried out in Weijiadi coal mine. The results showed that, The dip angle α1 and azimuth angle α2 affect the distribution of the deviatoric stress of the roadway surrounding rock. Under different stress field, the sensitivity of surrounding rock to α1 and α2 are different. Changing the more sensitive layout parameters can minimize the deviatoric stress and improve the stability of roadway. The PSO-AHP optimization algorithm takes the deviatoric stress as the index to calculate the layout parameters of different parts of the roadway, and then determines the optimal layout parameters through the evaluation function. The roadway of 1104 working face was arranged with the optimal parameters obtained by PSO-AHP optimization algorithm. Compared with the original layout scheme, the deviatoric stress of surrounding rock was reduced and the position of maximum deviatoric stress is transferred. The optimum layout of roadway was combined with an asymmetric support which had a good application effect.

scholarly journals Mathematical model and calculation of safety and stability evaluation of underground space engineering by TOPSIS and analytic hierarchy process

2021 ◽  
Vol 2083 (4) ◽  
pp. 042053
Author(s):  
Henghua Zhu ◽  
Xin Li ◽  
Chao Jia ◽  
Chunhua Liu ◽  
Xiao Zhu ◽  
...  
Keyword(s):  
Analytic Hierarchy Process ◽  
Urban Space ◽  
Stability Index ◽  
Underground Space ◽  
Analytic Hierarchy ◽  
Suitability Assessment ◽  
Quantitative Results ◽  
The Stability ◽  
Hierarchy Process ◽  
Safety And Stability

Abstract The development of economy promotes the development of urbanization, and the power of urban space engineering, so the stability research of urban underground space engineering is very important. Although the existing evaluation models can consider a single form of underground space safety problems, they seldom consider the uncertainty of cross-blending of multiple information types within a certain interval, and cannot continuously express the quantitative results of the suitability assessment of urban underground space. This paper takes an underground tunnel in China as the research background, calculates the weight of the selected construction stability index through the analytic hierarchy process, and finally evaluates the stability of different sections of the project by TOPSIS method, and draws the corresponding conclusions.

Engineering of Xinjiang Non Electricity Area and the Project Risk Assessment

2013 ◽  
Vol 411-414 ◽  
pp. 2537-2541
Author(s):  
Yuan Sheng Huang ◽  
Chun Yan Jia
Keyword(s):  
Risk Assessment ◽  
Economic Development ◽  
Analytic Hierarchy Process ◽  
Daily Life ◽  
Good Choice ◽  
Analytic Hierarchy ◽  
Project Risk ◽  
New Energy ◽  
The Stability ◽  
Hierarchy Process

By the end of 2010, Xinjiang has 2754 000 families (10753 000 population) who are not allowable to use electricity. This project is related to the economic development of these areas and is of great importance to enhance people,s welfare. It is also an important project in the Twelfth Five-Year plan. This paper supplies us two realization modes for non electricity area through electric grid extension and new energy power. It is appropriate to seek help from the main grid to extend electricity problems and ensure the stability and security of the electricity in these areas, in which population is relatively dense, or places are good prospects for the development or mineral rich. But for a considerable number of scattered or not fixed farmers and herdsmen, the utilization of new energy to realize the power of their daily life is a good choice. On this basis, this paper carried out the risk assessment of the implementation of the project by using fuzzy analytic hierarchy process.

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