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Road safety evaluation using data envelopment analysis case study: roads in provinces in Iran 基于数据包络分析的道路安全评价——以伊朗各省道路为例
Q4 Engineering Pub Date : 2017-07-19 DOI: 10.1504/IJVS.2017.10006064
Shahab Amelian, A. Shojaei, Sayyed Mohammad Reza Davoodi
The present study seeks to investigate efficiency of roads in provinces in Iran. Considering the resource limitation, prioritisation of roads seems necessary for better allocation of resources. Since it is possible to investigate decision-making units (DMUs) where there are several inputs and outputs without considering any weight for them in data envelopment analysis, this method is very suitable for ranking. In order to analyse efficiency, BCC model with variable return to scale was used and given that a number of DMUs become efficient after solving the model, Anderson-Peterson method was employed to determine strong efficiency. Considering that one of the advantages of data envelopment analysis is the possibility of offering a progress model for inefficient DMUs, the essential changes in inputs and outputs of inefficient DMUs for being efficient have been mentioned.
本研究旨在调查伊朗各省道路的效率。考虑到资源的限制,为了更好地分配资源,道路的优先级似乎是必要的。由于在数据包络分析中有可能调查决策单元(dmu),其中有几个输入和输出而不考虑它们的任何权重,因此该方法非常适合排名。为了分析效率,我们采用变规模收益的BCC模型,考虑到求解模型后,多个dmu变得高效,我们采用Anderson-Peterson法确定强效率。考虑到数据包络分析的优点之一是可以为无效率的决策单元提供一个进展模型,本文提到了无效率决策单元的投入和产出为提高效率而发生的本质变化。
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引用次数: 3
Using the driving behaviour to design a forward collision probability index 利用车辆的驾驶行为,设计了前向碰撞概率指标
Q4 Engineering Pub Date : 2017-07-19 DOI: 10.1504/IJVS.2017.10006056
Yuan-Lin Chen
This paper uses the driving behaviour to design a Forward Collision Probability Index (FCPI) for alerting and to assist the driver to keep a safety driving distance for avoiding the forward collision accident in highway driving. We use the time-to-collision (TTC) as a main factor for calculating the FCPI. The index of FCPI is easy understanding for the driver even those who have no professional knowledge in vehicle technology. A self-learning algorithm for reducing the wrong warnings is presented for obtaining a suitable FCPI for the driver, which means that calculating the FCPI could meet each driver's behaviour. For the value of FCPI, value 0 is indicating the 0% probability of forward collision, and values 0.5 and 1 are indicating the 50% and 100% probabilities of forward collision, respectively. The experimental results guaranteed that the self-learning algorithm could figure out an optimal FCPI index for each driver to meet his/her driving behaviour and could reduce the wrong warnings.
本文利用驾驶行为设计了一个前向碰撞概率指数(FCPI),用于提醒和帮助驾驶员保持安全行驶距离,以避免高速公路行驶中发生前向碰撞事故。我们使用碰撞时间(TTC)作为计算FCPI的主要因素。FCPI的指标对驾驶员来说很容易理解,即使是那些没有车辆技术专业知识的驾驶员。为了获得适合驾驶员的FCPI,提出了一种减少错误警告的自学习算法,这意味着计算FCPI可以满足每个驾驶员的行为。对于FCPI的值,值0表示前向碰撞的0%概率,值0.5和1分别表示前向冲突的50%和100%概率。实验结果保证了自学习算法可以为每个驾驶员找到一个最佳的FCPI指数,以满足他/她的驾驶行为,并可以减少错误警告。
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引用次数: 1
SEIR epidemic spreading model to suppress broadcast storm in vehicular ad hoc networks 抑制车载自组织网络广播风暴的SEIR流行病传播模型
Q4 Engineering Pub Date : 2017-07-19 DOI: 10.1504/IJVS.2017.10006058
M. Chitra, S. Sathya
Vehicular Ad Hoc Networks (VANETs) is a form of Intelligent Transportation System (ITS) to improve road safety and transport efficiency. During an emergency like accidents, traffic jams, etc., the vehicles in VANET are alerted with an Emergency Safety Message (ESM) through broadcasting. However, blind broadcasting of ESMs across VANETs leads to Broadcast Storm Problem (BSP) which would affect the QoS requirements of VANET. Hence, it is vital to suppress BSP to broadcast ESMs effectively. This paper proposes a Broadcast Storm Suppression Algorithm (BSSA) based on the concept of epidemic spreading, i.e. SEIR (Susceptible, Exposed, Infected and Removed) model. The broadcast storm is suppressed by finding the 'Farthest Infected Vehicle' (FIV) travelling in the direction of the ESM and recovering the other infected vehicles within the region to prevent from rebroadcasting the ESM. The SEIR model is simulated in NS-2.34 and found to outperform other popular broadcasting techniques.
车载自组织网络(VANET)是智能交通系统(ITS)的一种形式,旨在提高道路安全和运输效率。在事故、交通堵塞等紧急情况下,VANET中的车辆会通过广播收到紧急安全信息(ESM)。然而,ESM在VANET之间的盲广播会导致广播风暴问题(BSP),这将影响VANET的QoS要求。因此,抑制BSP对ESM的有效广播至关重要。本文提出了一种基于流行病传播概念的广播风暴抑制算法(BSSA),即SEIR(易感、暴露、感染和移除)模型。通过发现“最远受感染车辆”(FIV)朝ESM方向行驶,并在该地区内回收其他受感染车辆,以防止转播ESM,来抑制广播风暴。在NS-2.34中模拟了SEIR模型,发现其优于其他流行的广播技术。
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引用次数: 5
A conceptual emotion recognition framework: stress and anger analysis for car accidents 一个概念性情绪识别框架:车祸的压力和愤怒分析
Q4 Engineering Pub Date : 2017-07-19 DOI: 10.1504/IJVS.2017.10006028
J. K. Ooi, S. A. Ahmad, H. Harun, Y. Z. Chong, S. Ali
In year 2013, 777,817 out of 22,702,211 of registered vehicles were involved in road traffic crashes, with a damage cost of more than 9.3 billion ringgits in Malaysia. Automotive makers have deployed a wide range of active safety systems (traction control, auto cruise and braking, collision avoidance, and lane switching) in recent years. However, these systems failed to significantly reduce road crash statistics. The automotive network comprises the vehicle, road and driver. Huge effort had been placed on the vehicle and road, whereas the driver remains the feeblest part. Consequently, automotive makers should focus their attention on monitoring drivers' emotion, which influences their driving behaviour. This study aims to explore available technology that monitors driver behaviour, besides proposing accident-stimulating emotion that affects driving. Furthermore, a conceptual framework for recognising anger and stress emotion, which is a cause of road crash, is proposed.
2013年,22702211辆注册车辆中有777817辆发生道路交通事故,马来西亚的损失超过93亿林吉特。近年来,汽车制造商部署了广泛的主动安全系统(牵引力控制、自动巡航和制动、防撞和车道切换)。然而,这些系统未能显著减少道路碰撞统计数字。汽车网络包括车辆、道路和驾驶员。在车辆和道路上付出了巨大的努力,而司机仍然是最虚弱的部分。因此,汽车制造商应该把注意力集中在监测驾驶员的情绪上,这会影响他们的驾驶行为。这项研究旨在探索监测驾驶员行为的可用技术,此外还提出了影响驾驶的事故刺激情绪。此外,还提出了一个识别愤怒和压力情绪的概念框架,这是道路碰撞的原因。
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引用次数: 3
An improved modelling and optimisation of rail vehicle design based on safety criterion 基于安全准则的轨道车辆设计改进建模与优化
Q4 Engineering Pub Date : 2017-07-19 DOI: 10.1504/IJVS.2017.10006057
Nejlaoui Mohamed, Houidi Ajmi, Affi Zouhaier, Romdhane Lotfi
This paper deals with the modelling and the optimisation of a rail vehicle system moving in curved tracks running at high speeds. Based on the structural characteristics of the rail vehicle and its curved motion, we present an improved analytical quasi-static model. This model has the advantage of considering the roll motion. The improved model is validated through simulations, using the software ADAMS. The obtained model is used for the optimisation of the rail vehicle design. The safety criterion is evaluated using the derailment angle. A critical speed optimisation as a function of the radius of curvature and the rail vehicle design parameters is performed using genetic algorithm. The outcome of this work could help the designer in the choice of the adequate design parameters yielding the best compromise between the critical speed and the radius of curvature.
本文研究了在高速弯曲轨道上运行的轨道车辆系统的建模和优化。根据轨道车辆的结构特点及其弯曲运动,提出了一种改进的准静态分析模型。该模型具有考虑侧倾运动的优点。利用ADAMS软件对改进后的模型进行了仿真验证。所获得的模型用于轨道车辆设计的优化。使用脱轨角来评估安全标准。使用遗传算法进行作为曲率半径和轨道车辆设计参数的函数的临界速度优化。这项工作的结果可以帮助设计者选择适当的设计参数,从而在临界速度和曲率半径之间达成最佳折衷。
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引用次数: 0
Joint time-frequency analysis of EEG for the drowsiness detection: a study of cognitive behavioural patterns of the brain 脑电睡意检测的联合时频分析:脑认知行为模式的研究
Q4 Engineering Pub Date : 2017-07-19 DOI: 10.1504/IJVS.2017.10006065
D. Suman, M. Malini, B. Ramreddy
Drowsiness detection plays a vital role in accidents avoidance systems, thereby saving many precious lives. According to the World Health Organization, drowsiness has been the radical contributor of road fatalities. Electroencephalogram (EEG) is a physiological signal which relays the functioning of brain and is widely used in the diagnosis of neurological disorders. This study extrapolates the EEG signal analysis to examine several cognitive tasks. In this report, the EEG signal is processed to detect the behavioural patterns of the brain and drowsiness state of the drivers while performing monotonous driving for long distances. An eight-channel EEG data acquisition system is used to acquire the EEG data from 13 male volunteers. The EEG signal is pre-processed and decomposed into various rhythms by applying digital filter in MATLAB 2007b (Mathworks, Inc., USA). Time-frequency domain analysis has been done to extract certain features, PSG and PRMSD, which are statistically significant (ρ < 0.05) in the detection of drowsiness. The driving profile is classified into active and drowsy by a threshold, and linear regression analysis has been performed on the features extracted. A drowsiness index is proposed stating a positive correlation (0.8-0.9) between the total mean and the drowsy mean of the subject.
睡意检测在事故避免系统中起着至关重要的作用,从而挽救了许多宝贵的生命。根据世界卫生组织(World Health Organization)的数据,困倦一直是导致交通事故死亡的根本原因。脑电图是一种反映大脑功能的生理信号,在神经系统疾病的诊断中有着广泛的应用。本研究外推脑电图信号分析来检查几个认知任务。在本报告中,对脑电图信号进行处理,以检测驾驶员在进行单调的长途驾驶时大脑的行为模式和困倦状态。采用八通道脑电数据采集系统对13名男性志愿者进行脑电数据采集。在MATLAB 2007b (Mathworks, Inc., USA)中应用数字滤波器对EEG信号进行预处理并分解成各种节律。通过时频域分析提取出某些特征,PSG和PRMSD在检测嗜睡方面有统计学意义(ρ < 0.05)。通过阈值将driving profile分为active和sleepy,并对提取的特征进行线性回归分析。提出了一个困倦指数,表明总平均值与受试者的困倦平均值呈正相关(0.8-0.9)。
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引用次数: 0
Inverse dynamics of vehicle minimum time manoeuvre for collision avoidance problem 避碰问题中车辆最小时间机动的逆动力学
Q4 Engineering Pub Date : 2016-10-10 DOI: 10.1504/IJVS.2016.079654
Yingjie Liu, Junsheng Jiang
The paper describes a method for inverse dynamics of vehicle minimum time manoeuvre for collision avoidance problem. Based on this purpose, the vehicle minimum time manoeuvre for collision avoidance, which is treated as an optimal control problem, is firstly converted into a nonlinear programming problem by Gauss pseudospectral method (GPM) and is then solved with sequential quadratic programming (SQP). Finally, a real vehicle test was executed to verify the rationality of the proposed model and methodology. The results show that the simulation values are in good agreement with the real vehicle test values. The algorithm is not only precise, but can also shorten the evaluation period of vehicle handling stability and reduce the tremendous cost for real vehicle testing. The study can more truly simulate the emergency collision avoidance quality including the varying of minimum avoidable distance with different initial velocity.
本文介绍了避碰问题中车辆最小时间机动逆动力学的一种方法。基于此,首先将车辆最小机动时间问题作为最优控制问题,利用高斯伪谱法(GPM)将其转化为非线性规划问题,然后利用序贯二次规划(SQP)进行求解。最后,通过实车试验验证了所提模型和方法的合理性。结果表明,仿真值与实车试验值吻合较好。该算法不仅精度高,而且可以缩短车辆操纵稳定性的评估周期,降低实车测试的巨大成本。该研究可以更真实地模拟包括最小可避免距离随不同初速度变化的紧急避碰质量。
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引用次数: 2
Reduction of whiplash injury in rear-end automotive collision using linear damping seat 线性阻尼座椅减少汽车追尾碰撞中颈部扭伤的研究
Q4 Engineering Pub Date : 2016-10-10 DOI: 10.1504/IJVS.2016.079656
K. Alkhulaifi, M. Alardhi, J. Alrajhi, Y. Alhouli, A. Abed
Automotive rear-end collisions cause neck injuries. This has become a major problem in traffic safety over the last two decades. The situation calls for more research in the field. The damping seat slide is one area of interest which is used for reducing neck injury. To reduce neck injury (whiplash), based upon new biomechanical research, the motion between head and torso should be reduced. In case of a rear-end impact, a new seat will slide backwards during the impact, which allows the motion to damp. Working Model software was used first to simulate and analyse the behaviour of the new system. Also, a test rig was developed for experimental purposes. The results show occupant protection increases with the new damping seat slide by reducing the neck injury criterion by 35%.
汽车追尾会导致颈部受伤。在过去的二十年里,这已经成为交通安全的一个主要问题。这种情况要求在该领域进行更多的研究。阻尼座椅滑块是减少颈部损伤的一个领域。为了减少颈部损伤(鞭打),根据新的生物力学研究,头部和躯干之间的运动应该减少。在发生追尾碰撞的情况下,新座椅将在碰撞过程中向后滑动,从而使运动阻尼。首先使用工作模型软件对新系统的行为进行模拟和分析。此外,还研制了一个试验台,用于实验目的。结果表明,新型减震座椅可将颈部损伤标准降低35%,提高乘员防护能力。
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引用次数: 1
Improvement of LQR active anti-roll control of a single-unit heavy vehicle by means of a trained artificial neuronal network 用训练好的人工神经网络改进单单元重型车辆LQR主动防侧倾控制
Q4 Engineering Pub Date : 2016-10-10 DOI: 10.1504/IJVS.2016.079657
S. Babesse, D. Ameddah
In this paper, a neuronal network is used to improve a Linear-Quadratic Regulator (LQR) active anti-roll control applied to a single-unit heavy vehicle suspension with linear and non-linear side force model. First, to keep the normalised rollovers between front and rear axles, equal to or below unity, the LQR control is proposed. After that, the training data collected from this controller are used as a training basis of a neuronal regulator. The artificial neuronal network controller is thereafter applied for the non-linear side force model, and it gives more satisfactory results than the LQR.
针对具有线性和非线性侧力模型的单单元重型汽车悬架,采用神经网络改进了线性二次型调节器(LQR)主动防侧倾控制。首先,为了使归一化前后轴侧翻量等于或低于1,提出了LQR控制。之后,从该控制器收集的训练数据作为神经元调节器的训练基础。将人工神经网络控制器应用于非线性侧力模型,得到了比LQR更令人满意的结果。
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引用次数: 0
Research on the fire pre-alarm system of bus engine compartment based on difference and fixed temperature control method 基于差分定温控制方法的客车发动机舱火灾预警系统研究
Q4 Engineering Pub Date : 2016-10-10 DOI: 10.1504/IJVS.2016.079653
Dong Haibin, Shen Yanfeng, Hong Qingquan, Ma Jianqin, L. Lianxi, Yang Zhenming, Xian Xuelei
This paper analyses the features and positions of fires occurring in a bus engine compartment by many fire accidents, then develops a fire pre-alarm system used in bus engine compartment based on difference and fixed temperature control method by collecting and analysing the temperature data from the real bus engine compartment and simulated testing apparatus fire, and finally validates the accuracy and reliability of this system by relative tests, that provides a reliable solution for early fire detection and warning in bus engine compartment.
分析了多起火灾事故中客车发动机舱发生火灾的特点和位置,通过对真实客车发动机舱和模拟试验装置火灾的温度数据的采集和分析,开发了一种基于差分和定温控制方法的客车发动机舱火灾预警系统,并通过相关试验验证了该系统的准确性和可靠性。为客车发动机舱火灾的早期探测和预警提供了可靠的解决方案。
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引用次数: 0
期刊
International Journal of Vehicle Safety
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