scholarly journals Comfort Evaluation of an Aircraft Cabin System Employing a Hybrid Model

2020 ◽  
Vol 12 (20) ◽  
pp. 8503 ◽  
Author(s):  
Jing Liu ◽  
Suihuai Yu ◽  
Jianjie Chu
Keyword(s):  
Hybrid Model ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Comfort Level ◽  
Aircraft Cabins ◽  
Aircraft Cabin ◽  
System A ◽  
Number Of Factors ◽  
Comfort Perception ◽  
Cabin Environment

Comfort is becoming one of the most important principles in the process of design and evaluation of civil aircraft cabins. However, the comprehensive quantitative evaluation of comfort in an aircraft cabin is a complicated issue because of the subjectivity of comfort perception and a large number of factors involved in the whole complex cabin system. A hybrid model combined with the Decision Making Trial and Evaluation Laboratory (DEMATEL) method and fuzzy comprehensive evaluation is proposed, which considers both the interrelation between the criteria and the fuzziness of subjective comfort perception concurrently. The result of the empirical study from the questionnaire survey in flight was consistent with that of the hybrid model. The proposed model is effective. It could provide a more reasonable priority to improve comfort in the aircraft cabin. According to the measured results of the cabin environment, the cabin facilities and layout, seats and service, the specific differences between the criteria can be displayed clearly, which is helpful to improve the cabin comfort level.

scholarly journals Comfort evaluation of aircraft cabin system employing a hybrid model

2020 ◽  
Author(s):  
Jing LIU ◽  
Suihuai YU ◽  
Jianjie CHU
Keyword(s):  
Hybrid Model ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Comfort Level ◽  
Aircraft Cabin ◽  
System A ◽  
Proposed Model ◽  
Civil Aircraft ◽  
Comfort Perception ◽  
Cabin Environment

Abstract Comfort is becoming one of the most important principles in the process of design and evaluation of civil aircraft cabin. However, the comprehensive quantitative evaluation of comfort in an aircraft cabin is a complicated issue, because of the subjectivity of comfort perception and a large amount of factors involved in the whole complex cabin system. A hybrid model combined with Decision Making Trial and Evaluation Laboratory (DEMATEL) method and fuzzy comprehensive evaluation is proposed, which considers both the interrelation between the criteria and the fuzziness of subjective comfort perception concurrently. The result of empirical study from questionnaire survey in flight was consistent with that of the hybrid model. The proposed model is effective. It could provide a more reasonable priority to improve comfort in the aircraft cabin. According to the measured results of cabin environment, cabin facilities and layout, seat and service, the specific differences between the criteria can be displayed clearly, which is helpful to improve the cabin comfort level.

Research of Armored Vehicle Cabin Environment Comprehensive Evaluation

2014 ◽  
Vol 610 ◽  
pp. 136-141
Author(s):  
Wei Ping Liu ◽  
Xian Zhi Yan ◽  
Guan Sheng Huang ◽  
Yi Jin
Keyword(s):  
Comprehensive Evaluation ◽  
Weighted Average ◽  
Fuzzy Comprehensive Evaluation ◽  
Analytic Hierarchy ◽  
Vehicle Cabin ◽  
Military Vehicle ◽  
Armored Vehicle ◽  
Cabin Environment ◽  
Environment Parameters ◽  
Hierarchy Process

According to the characteristics and demand of the armored vehicle cabin environment evaluation, the cabin environment parameters are processed the method of dimensionless normalized processing, the weight coefficients of each parameters are evaluated by using analytic hierarchy process (AHP), the result vector of fuzzy comprehensive evaluation is analyzed by using weighted average principle, the result is ideal. At the same time, considering the problems of the fuzzy comprehensive evaluation and the particularity of military vehicle evaluation, the ultra limit additional evaluation is proposed.

Comprehensive Evaluation Based on AHP-Fuzzy about the Conception of Underground Container Transportation Lines in Shanghai

2011 ◽  
Vol 71-78 ◽  
pp. 175-181 ◽  
Author(s):  
Cheng Zhang ◽  
Si Wei Wang
Keyword(s):  
Transport System ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Actual Situation ◽  
Container Transportation ◽  
Container Transport ◽  
System A ◽  
Transportation Capacity ◽  
Functional Orientation ◽  
Set Up

Through the research and analysis of Shanghai Port Container transportation capacity, we can see that the construction of underground container transport system is important to transfer Shanghai into an international hub. Combined the functional orientation of the concept program of underground container lines with the underground characteristics of the container transport system, a system of evaluation target has been set up. Sorted the concept lines by using AHP-Fuzzy comprehensive evaluation, the result can reflect the actual situation of concept lines objectively, and can also provide optimizational service for the concept program of underground container line.

scholarly journals Collaborative Content Downloading in VANETs with Fuzzy Comprehensive Evaluation

Symmetry ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 502 ◽  
Author(s):  
Tianyu Huang ◽  
Xijuan Guo ◽  
Yue Zhang ◽  
Zheng Chang
Keyword(s):  
Ad Hoc ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Evaluation ◽  
System A ◽  
The Individual ◽  
Segment Data ◽  
And Storage ◽  
Basic Evaluation

Vehicle collaborative content downloading has become a hotspot in current vehicular ad-hoc network (VANET) research. However, in reality, the highly dynamic nature of VANET makes users lose resources easily, and the transmission of invalid segment data also wastes valuable bandwidth and storage of the users’ vehicles. In addition, the individual need of each customer vehicle should also be taken into consideration when selecting an agent vehicle for downloading. In this paper, a novel scheme is proposed for vehicle selection in the download of cooperative content from the Internet, by considering the basic evaluation information of the vehicle. To maximize the overall throughput of the system, a collaborative content downloading algorithm is proposed, which is based on fuzzy evaluation and a customer’s own expectations, in order to solve the problems of agent vehicle selection. With the premise of ensuring successful downloading and the selection preferences of customer vehicles, linear programming is used to optimize the distribution of agent vehicles and maximize customer’s satisfaction. Simulation results show that the proposed scheme works well in terms of average quality of service, average bandwidth efficiency, failure frequency, and average consumption.

Application of Gray-Fuzzy Comprehensive Evaluation in Duration Risk Forecast of Hydropower Project

2013 ◽  
Vol 357-360 ◽  
pp. 2434-2440
Author(s):  
Hui An ◽  
Shou Yuan Tang ◽  
Ru Wang
Keyword(s):  
Predictive Model ◽  
Index System ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Hydropower Project ◽  
System A ◽  
Result Show ◽  
Risk Forecast

Period risk study and gray-fuzzy comprehensive evaluation is introduced and extended into hydropower project in this paper. The characteristics of hydropower project and the importance of duration risk are analyzed, and duration risk study and gray-fuzzy comprehensive evaluation is used to hydropower project based on an index system. A gray-fuzzy comprehensive evaluation predictive model is built and applied to a hydropower project. The result show that the model and method proposed is valid.

Assessment of turbulence models and air supply opening models for CFD modelling of airflow and gaseous contaminant distributions in aircraft cabins

2017 ◽  
Vol 27 (5) ◽  
pp. 606-621 ◽  
Author(s):  
Mengxi Li ◽  
Yihuan Yan ◽  
Bin Zhao ◽  
Jiyuan Tu ◽  
Junjie Liu ◽  
...  
Keyword(s):  
Turbulence Models ◽  
Reynolds Stress Model ◽  
Cfd Modelling ◽  
Aircraft Cabins ◽  
Aircraft Cabin ◽  
Basic Model ◽  
Air Supply ◽  
Airflow Field ◽  
Cabin Environment ◽  
Similar Accuracy

Computational fluid dynamics (CFD) is an important and effective tool to study the airflow field and contaminant distribution in aircraft cabins. The accuracy of numerical simulation using the CFD approach could be significantly affected by configurations of the inlet boundary conditions, turbulence model, etc. The core of this study was to assess whether conclusions achieved in simulation of airflow on usual surfaces in buildings like in commercial offices could be applicable to aircraft cabins. Comparative studies involving turbulence models or air supply opening models in aircraft cabin environment are still absent in the literature. Therefore, in this study, two turbulence models (the renormalization group (RNG) k-ɛ model and Reynolds-stress model) and three types of air supply opening models (simple open model, basic model and momentum model) were applied to simulate the airflow and contaminant concentration fields in a mockup seven-row cabin section. Our simulation results were compared with the experimental data. Six indexes based on different criteria were used to quantitatively evaluate the agreement between measurements and modelled results given by turbulence models and air supply opening models. The results show that the RNG k-ɛ and RSM turbulence models have similar accuracy in airflow and contaminant fields in the mockup cabin, and the momentum model has the best accuracy among the three air supply opening models for the aircraft cabin environment.

Multi-Level Fuzzy Comprehensive Evaluation of Hydraulic Oil Performance

2012 ◽  
Vol 426 ◽  
pp. 255-259
Author(s):  
Q. Wang ◽  
L. Shi ◽  
Sheng Li Song ◽  
S.M. Chen
Keyword(s):  
Performance Test ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Comprehensive Evaluation Method ◽  
Number Of Factors ◽  
Oil Performance ◽  
Multi Level ◽  
And Performance ◽  
Physical And Chemical

There are a large number of factors influencing the performance of hydraulic oils, and many of them can not be quantified. Currently, the evaluation indices of hydraulic oils are contamination, physical and chemical performance. In this paper, a new fuzzy comprehensive evaluation method is put forward, by which the oil can be synthetically evaluated from the aspects of physical and chemical indices, simulant indices and performance test indices.

Intelligent Lighting Control System in Large-Scale Sports Competition Venues

2018 ◽  
pp. 172-182 ◽  
Author(s):  
Shengmin CAO
Keyword(s):  
Control System ◽  
Large Scale ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Practical Significance ◽  
Lighting Control ◽  
Sports Events ◽  
Planning And Design ◽  
Comprehensive Evaluation Model

This paper mainly studies the application of intelligent lighting control system in different sports events in large sports competition venues. We take the Xiantao Stadium, a large­scale sports competition venue in Zaozhuang City, Shandong Province as an example, to study its intelligent lighting control system. In this paper, the PID (proportion – integral – derivative) incremental control model and the Karatsuba multiplication model are used, and the intelligent lighting control system is designed and implemented by multi­level fuzzy comprehensive evaluation model. Finally, the paper evaluates the actual effect of the intelligent lighting control system. The research shows that the intelligent lighting control system designed in this paper can accurately control the lighting of different sports in large stadiums. The research in this paper has important practical significance for the planning and design of large­scale sports competition venues.

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