Fuzzy Comprehensive Evaluation on Body Parts’ Weight Coefficients towards Sitting Comfort Based on AHP to Limit Entropy Method

Gao, Zhenhai; Li, Mingyue; Gao, Fei; Wang, Xingyue

doi:10.1155/2019/3826468

Cited by 10 publications

(11 citation statements)

References 25 publications

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“…According to the Human Dimensions of Chinese Adults GB10000-88, and the analysis report about the human dimensions of Chinese adults made by China National Institute of Standardization in 2009 [26], as in Table 1, six 50th and ten 95th were selected from the recruiters. Referring to PRC Road Traffic Law on State Security, drivers who drive vehicles on highways during the internship period shall be accompanied by drivers who hold corresponding or higher driving licenses for more than three years.…”

Section: A Overview Of Experiments and Participantsmentioning

confidence: 99%

“…8, the backrest force Fb increased the horizontal force that applied to the ischial tuberosity, causing the friction on the skin and subcutaneous tissue increased, affecting the driving comfort. The thigh contains the aorta and nervous system [26], so if the pressure applied for a longer period of time, the muscles are prone to have pain and may be paralyzed, which affects the nerve conduction in lower limbs. In driving condition, the back muscles are squeezed and the abdomen muscles are tightened, so if sitting in a driving posture for a long time, resulting in the increase of muscle activity of waist, and ultimately led the muscles of waist to have pain.…”

Section: A the Comfort Of Vehicle Seat Based On Pressure Distributionmentioning

confidence: 99%

“…Due to the differences in physiological characteristics of human body, there are also some differences in the comfort of different body part, that appears as partial discomfort in field driving. During long-term driving, if more pressure is focused on a certain body part, or the forces applied to the body part for a long term state, will enhance the permeability of blood vessels, and damage the blood flow of capillaries in nerves, affecting the nutrition of nerve roots, and that will cause numbness, pain, myasthenia and so on in human body [26], as shown in Fig. 9.…”

Section: B the Comfort Of Vehicle Seat Based On Electromyographymentioning

confidence: 99%

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Quantitative Evaluation of Vehicle Seat Driving Comfort During Short and Long Term Driving

Gao

et al. 2020

IEEE Access

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Regarding changes of subjective and objective parameters of comfort during short and longterm driving, the arbitrariness of traditional subjective evaluation methods, as well as the defects of objective method where issues can be qualitatively but not quantitatively analyzed. By measuring pressure distribution and electromyography during short and long-term driving respectively, the article obtained pressure indicators, electromyography characteristic parameters and the corresponding subjective evaluations of drivers. The variation of subjective and objective parameters of comfort, the difference in terms of comfort and the fatigable body parts were tested. By means of correlation analysis completed the indicators screen. Proposed a new comprehensive weighting method-AHP to limit entropy method, established the mapping relations between subjective comfort and objective indicators, which based on pressure distribution and physiological information during short-term and long-term driving. Obtained a quantitative evaluation method that applies pressure distribution, physiological information and subjective evaluation to effectively evaluate driving comfort, and thus provided a theoretical basis for evaluating driving comfort. INDEX TERMS Comfort, long-term driving, quantitative assessment, short-term driving.

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Section: A Overview Of Experiments and Participantsmentioning

confidence: 99%

Section: A the Comfort Of Vehicle Seat Based On Pressure Distributionmentioning

confidence: 99%

Section: B the Comfort Of Vehicle Seat Based On Electromyographymentioning

confidence: 99%

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Quantitative Evaluation of Vehicle Seat Driving Comfort During Short and Long Term Driving

Gao

et al. 2020

IEEE Access

Self Cite

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“…In terms of weight combination, Niu et al determined the combination of the two weighting methods by finding the difference coefficient [11]. Gao et al obtained the combination weight by using the objective data to modify the weighting method of the subjective data [12]. Zhai et al achieved the combined weight of the goal through an optimized planning method [13].…”

Section: Weight Combination Methodmentioning

confidence: 99%

Effectiveness Evaluation of Missile Electromagnetic Launch System Based on ADC Model Improved by EWM-FAHP-ICWGT

Chen

2020

Mathematical Problems in Engineering

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To solve the key problems of strong infrared radiation, poor continuous combat capability of the system, serious ablation of the launching device, and environmental pollution during missile launch, the electromagnetic launch system (EMLS) has been studied for missile launching tasks. However, most of the current research studies are aimed at specific technical points and lack the overall design and evaluation of the system. Therefore, the designed system may have problems such as excessive cost, lack of economy, or low overall efficiency. In order to complete the overall evaluation of the missile electromagnetic launch system (MEMLS), this article established an ADC model improved by entropy weight method-fuzzy analytic hierarchy process-improved combination weighting model of game theory (EWM-FAHP-ICWGT). The established model integrates subjective and objective weights, eliminating the problem of negative combination coefficients that traditional CWGT may bring, and the average difference in combination weights is the smallest. Difference analysis and differential analysis are also used here to discuss the requirements for the reliability indicator which is mean time between failure (MTBF) and maintainability indicator which is mean time to repair (MTTR) to further improve the effectiveness of the system. Finally, the indicators that have a significant impact on the performance of MEMLS are analyzed, which provides a direction for further research on the system.

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“…At the same time, the weighting methods for different levels of indicators are not different and targeted. In terms of weight combination, Niu calculated the combination of the two weighting methods by finding the difference coefficient [6]; Gao obtained the combination weight by using the objective data to modify the weighting method of the subjective data [7]; Zhai achieved the combined weight of the goal through an optimized planning method [8]. The above weight combination model is only suitable for the combination of two weighting methods and has a high dependence on one of the methods, which has certain limitations and cannot guarantee accuracy.…”

Section: Introductionmentioning

confidence: 99%

An Improved Model for Effectiveness Evaluation of Missile Electromagnetic Launch System

Li¹,

Chen²,

Xu³

et al. 2020

IEEE Access

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To solve the key problems of strong infrared radiation, poor continuous combat capability of the system, serious ablation of the launching device, and environmental pollution during missile launch, electromagnetic launch system (EMLS) has been studied for missile launching tasks. Since most of the current research is aimed at the key technologies and there is a lack of evaluation and balance of the entire system, the effectiveness of the missile electromagnetic launch system (MEMLS) needs to be evaluated. To solve the shortcomings of the existing effectiveness evaluation model, this paper establishes an improved model for effectiveness evaluation. The new model takes the availability-dependability-capability (ADC) model as the basic evaluation framework. The L20(2 19) orthogonal table is constructed by using the orthogonal design idea without interaction. On the basis of quantifying and normalizing the indicators, different weighting methods are adopted according to the different characteristics of the two level indicators. The improved combination weighting model of game theory (ICWGT) is used to obtain the combined weights for indicators of each level. To coordinate the incompleteness, ambiguity, and randomness of the information, and at the same time meet the requirements of flexible numerical feature values, the asymmetric gray cloud model (AGCM) is used to determine the evaluation level and evaluation value of the inherent capability C. On the basis of calculating the effectiveness evaluation value of each scheme by ADC model, the significance of each capability indicator of MEMLS was analyzed by variance analysis method. The conclusions obtained are consistent with the actual situation, which verifies the effectiveness of the model. INDEX TERMS Missile electromagnetic launch system (MEMLS), Effectiveness evaluation, Availabilitydependability-capability (ADC) model, Orthogonal design, The improved combination weighting model of game theory (ICWGT), Asymmetric gray cloud model (AGCM)

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Fuzzy Comprehensive Evaluation on Body Parts’ Weight Coefficients towards Sitting Comfort Based on AHP to Limit Entropy Method

Cited by 10 publications

References 25 publications

Quantitative Evaluation of Vehicle Seat Driving Comfort During Short and Long Term Driving

Quantitative Evaluation of Vehicle Seat Driving Comfort During Short and Long Term Driving

Effectiveness Evaluation of Missile Electromagnetic Launch System Based on ADC Model Improved by EWM-FAHP-ICWGT

An Improved Model for Effectiveness Evaluation of Missile Electromagnetic Launch System

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