Transportation Safety and Environment最新文献_第3页

Ride-hailing origin-destination demand prediction with spatiotemporal information fusion 时空信息融合的叫车始发地需求预测

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-18 DOI: 10.1093/tse/tdad026

Ning Wang, Liang Zheng, Huitao Shen, Shukai Li

引用次数: 1

Effects of the windshield inclination angle on head/brain injuries in car-to-pedestrian collisions using computational biomechanics models 基于计算生物力学模型的汽车与行人碰撞中挡风玻璃倾角对头部/脑损伤的影响

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-16 DOI: 10.1093/tse/tdad016

Fang Wang, Mingliang Wang, Lin Hu, Ke Peng, Jiajie Yin, Danqi Wang, Liangliang Shi, Zhou Zhou

{"title":"Effects of the windshield inclination angle on head/brain injuries in car-to-pedestrian collisions using computational biomechanics models","authors":"Fang Wang, Mingliang Wang, Lin Hu, Ke Peng, Jiajie Yin, Danqi Wang, Liangliang Shi, Zhou Zhou","doi":"10.1093/tse/tdad016","DOIUrl":"https://doi.org/10.1093/tse/tdad016","url":null,"abstract":"\u0000 Car-to-pedestrian collision (CPC) accidents occur frequently, and pedestrians often suffer serious head/brain injuries. One major cause is the primary impact with the windshield. Here, we use a numerical simulation method to study the influence of the windshield inclination angle of a passenger car on pedestrian head/brain injury due to CPC accidents. The range of the windshield inclination angle was set to 24°–50°, with an interval of 2°. The results show that the windshield angle significantly affects the pedestrian kinematics and exerts different effects on the head injury when evaluating with various head injury criteria. Regarding the head peak linear/rotational acceleration and acceleration-based criteria head injury criterion (HIC)/rotational injury criterion (RIC), the predictions at the secondary impact stage have no clear relationship with the windshield angle (R2 = 0.04, 0.07, 0.03 and 0.26, respectively), and their distributions are scattered. In the primary impact, the peak linear acceleration and HIC show a weak trend of first decreasing and then increasing with the increasing of the windshield angle, and the rotational acceleration and RIC tend to remain relatively constant. Regarding the cumulative strain damage measure (CSDM) criterion, the predictions at the primary impact are slightly lower than those at the secondary impact, and the trend of first decreasing and then increasing with the increase in the windshield angle is observed at both impact stages. When the windshield inclination angle is approximately 32°–40°, the head injury severity in both impact phases is generally lower than that predicted at other windshield angles.","PeriodicalId":52804,"journal":{"name":"Transportation Safety and Environment","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43056437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low complexity model predictive control of four-level active neutral point clamped inverter without weighting factors 无权重因子的四电平有源中性点箝位逆变器低复杂度模型预测控制

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-16 DOI: 10.1093/tse/tdad023

Chaoqun Xiang, Ziyin Fan, Songyang Jiang, Xinan Zhang, Shu Cheng

引用次数: 0

Factors affecting college students’ attitudes toward carpooling 影响大学生拼车态度的因素

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-13 DOI: 10.1093/tse/tdad025

Linchao Li, Huali Zhang, Zuoxian Gan

{"title":"Factors affecting college students’ attitudes toward carpooling","authors":"Linchao Li, Huali Zhang, Zuoxian Gan","doi":"10.1093/tse/tdad025","DOIUrl":"https://doi.org/10.1093/tse/tdad025","url":null,"abstract":"\u0000 As a sustainable mode of travel, carpooling is an effective solution to environmental and energy problems, but carpooling has not been fully utilized. The research on carpooling attitude, especially for college students, still needs to be improved. In response to this problem, this paper aims to investigate the effect of personal attributes, travel attributes, attitude attributes, and other attributes of students on carpooling attitudes in China. To collect the data, an online questionnaire survey was implemented at Shenzhen University, and 514 students participated. Based on the samples, the multinomial logit model is used to explore the contribution of all variables. The model results showed that personal attributes such as gender and age had no significant effect on the attitude of college students toward carpooling. The safety of carpooling and the high cost of carpooling make college students have a neutral attitude towards carpooling. The most concerning factor for college students in carpooling is the comfort of carpooling. These findings can provide valuable suggestions for measures to be taken in response to different attributes affecting students’ attitudes and are particularly important for the university and government to make optimal decisions for motivating students to select carpooling.","PeriodicalId":52804,"journal":{"name":"Transportation Safety and Environment","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43638393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

BLE Beacon-based floor detection for mobile robots in a multi-floor automation Laboratory 基于BLE信标的多层自动化实验室移动机器人地板检测

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-11 DOI: 10.1093/tse/tdad024

Haiping Wu, Hui Liu, T. Roddelkopf, K. Thurow

{"title":"BLE Beacon-based floor detection for mobile robots in a multi-floor automation Laboratory","authors":"Haiping Wu, Hui Liu, T. Roddelkopf, K. Thurow","doi":"10.1093/tse/tdad024","DOIUrl":"https://doi.org/10.1093/tse/tdad024","url":null,"abstract":"\u0000 As an important task of multi-floor localization, floor detection has elicited great attention. Wireless infrastructures like Wi-Fi and Bluetooth low-energy play important roles in floor detection. However, most floor detection research studies tend to focus on data modeling but pay little attention to the data collection system, which is the basis of wireless infrastructure-based floor detection. In fact, the floor detection task can be greatly simplified with proper data collection system design. In this paper, a floor detection solution is developed in a multi-floor life science automation lab. A data collection system consisting of BLE beacons, receiver node, and IoT cloud is provided. The features of the BLE beacon under different settings are evaluated in detail. A mean filter is designed to deal with the fluctuation of the RSSI data. A simple floor detection method without a training process was implemented and evaluated in more than 100 floor detection tests. The time delay and floor detection accuracy under different settings are discussed. Finally, floor detection is evaluated on the H20 multi-floor transportation robot. Two sensor nodes are installed on the robot at different heights. The floor detection performance with different installation heights is discussed. The experimental results indicate that the proposed floor detection method provides floor detection accuracy of 0.9877 to 1 with a time delay of 5 s.","PeriodicalId":52804,"journal":{"name":"Transportation Safety and Environment","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42728982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correcting of Unexpected Localization Measurement for Indoor Automatic Mobile Robot Transportation Based on neural network 基于神经网络的室内自动移动机器人运输非预期定位测量校正

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-05 DOI: 10.1093/tse/tdad019

Jiahao Huang, S. Junginger, Hui Liu, K. Thurow

引用次数: 1

Tunnel bottleneck management with high-occupancy vehicles priority on intelligent freeways 智能高速公路高占用率车辆优先的隧道瓶颈管理

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-05 DOI: 10.1093/tse/tdad022

Jinyong Gao, Juncheng Zeng, Xinyuan Wang, Cheng Zhou, Hailin Zhang, Jintao Lai

{"title":"Tunnel bottleneck management with high-occupancy vehicles priority on intelligent freeways","authors":"Jinyong Gao, Juncheng Zeng, Xinyuan Wang, Cheng Zhou, Hailin Zhang, Jintao Lai","doi":"10.1093/tse/tdad022","DOIUrl":"https://doi.org/10.1093/tse/tdad022","url":null,"abstract":"\u0000 Tunnels on freeways, as one of the critical bottlenecks, frequently cause severe congestion and passenger delay. To solve the tunnel bottleneck problem, most of the existing research can be divided into two types. One is to adopt Variable Speed Limits (VSL) to regulate a predetermined speed for vehicles to get through a bottleneck smoothly. The other is to adopt High-Occupancy Vehicle (HOV) lane management. In HOV lane management strategies, all traffic is divided into HOVs and Low-occupancy Vehicles (LOV). HOVs are vehicles with a driver and one or more passengers. LOVs are vehicles just with a driver. This kind of research can grant priority to HOVs by providing a dedicated HOV lane. However, the existing research cannot both mitigate congestion and maximize passenger-oriented benefits. To address the research gap, this paper leverages Connected and Automated Vehicle (CAV) technologies on intelligent freeways and develops a tunnel bottleneck management strategy with a Dynamic HOV Lane (DHL). The strategy bears the following features: 1) enable tunnel bottleneck management at a microscopic level; 2) maximize passenger-oriented benefits; 3) grant priority to HOVs even when the HOV lane is open to LOVs; 4) allocate right-of-way segments for HOVs and LOVs in real time; 5) perform well in a mixed traffic environment. The proposed strategy is evaluated through comparison against the non-control baseline and a VSL strategy. Sensitivity analysis is conducted under different congestion levels and penetration rates. The results demonstrate that the proposed strategy outperforms in terms of passenger-oriented delay reduction and HOVs'priority level improvement.","PeriodicalId":52804,"journal":{"name":"Transportation Safety and Environment","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42424135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remaining useful life prediction for train bearing based on ILSTM network with adaptive hyperparameter optimization 基于自适应超参数优化ILSTM网络的列车轴承剩余使用寿命预测

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-05 DOI: 10.1093/tse/tdad021

Deqiang He, Jingren Yan, Zhenzhen Jin, Xueyan Zou, S. Shan, Zaiyu Xiang, Jian Miao

{"title":"Remaining useful life prediction for train bearing based on ILSTM network with adaptive hyperparameter optimization","authors":"Deqiang He, Jingren Yan, Zhenzhen Jin, Xueyan Zou, S. Shan, Zaiyu Xiang, Jian Miao","doi":"10.1093/tse/tdad021","DOIUrl":"https://doi.org/10.1093/tse/tdad021","url":null,"abstract":"\u0000 Remaining useful life (RUL) prediction for bearing is a significant part of the maintenance of urban rail transit trains. Bearing RUL is closely linked to the reliability and safety of train running, but the current prediction accuracy is difficult to meet the requirements of high reliability operation. Aiming at the problem, a prediction model based on improved long short-term memory(ILSTM) network is proposed. Firstly, the variational mode decomposition is used to process the signal, and the intrinsic mode function with stronger representation ability is determined according to energy entropy, and the degradation feature data is constructed combined with the time domain characteristics. Then, to improve learning ability, rectified linear unit (ReLU) is applied to activate a fully connected layer lying after LSTM, the hidden state outputs of the layer are weighted by attention mechanism. Harris hawks optimization algorithm is introduced to adaptively set the hyperparameters to improve the performance of LSTM. Finally, the ILSTM is applied to predict bearing RUL. Through experimental cases, the better performance in bearing RUL prediction and the effectiveness of each improving measures of the model are validated, and its superiority of hyperparameters setting is demonstrated.","PeriodicalId":52804,"journal":{"name":"Transportation Safety and Environment","volume":"41 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61099120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of leading-edge angle of subgrade on aerodynamic loads of high-speed train in wind tunnel 路基前缘角对高速列车风洞气动载荷的影响

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-05-04 DOI: 10.1093/tse/tdad020

Yang Zeyun, Xu Gang, Wu Fan, Zhang Lei, Du Jian, D. Vainchtein

引用次数: 0

Research on the navigational risk of liquefied natural gas carriers in an inland river based on entropy: a cloud evaluation model 基于熵云评价模型的内河液化天然气运输船航行风险研究

IF 2.2 4区工程技术

Transportation Safety and Environment Pub Date : 2023-04-26 DOI: 10.1093/tse/tdad018

Chengyong Liu, Shijie Li, Shuzhe Chen, Qifan Chen, Kang Liu

{"title":"Research on the navigational risk of liquefied natural gas carriers in an inland river based on entropy: a cloud evaluation model","authors":"Chengyong Liu, Shijie Li, Shuzhe Chen, Qifan Chen, Kang Liu","doi":"10.1093/tse/tdad018","DOIUrl":"https://doi.org/10.1093/tse/tdad018","url":null,"abstract":"\u0000 Due to the flammability and explosive nature of liquefied natural gas (LNG), an extremely strict process is followed for the transportation of LNG carriers in China. Particularly, no LNG carriers are operating in inland rivers within the country. Therefore, to ensure the future navigation safety of LNG carriers entering the Yangtze River, the risk sources of LNG carriers' navigation safety must be identified and evaluated. Based on the Delphi and expert experience method, this paper analyzes and discusses the navigation risk factors of LNG carriers in the lower reaches of the Yangtze River from four aspects (human, ship, environment, and management), and identifies 12 risk indicators affecting the navigation of LNG carriers, and establishes a risk evaluation index system. Further, an entropy weight fuzzy model is utilized to reduce the influence of subjective judgment on the index weight as well as to conduct a segmented and overall evaluation of LNG navigation risks in the Baimaosha Channel. Finally, the cloud model is applied to validate the consistent feasibility of the entropy weight fuzzy model. The research results indicate that the method provides effective technical support for further study on the navigation security of LNG carriers in inland rivers.","PeriodicalId":52804,"journal":{"name":"Transportation Safety and Environment","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48077048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0