Results 1 to 10 of about 839,166 (302)

Effect of valve on ballistic performance in supercritical CO2 pneumatic launch

Journal of CO2 Utilization, 2023
To investigate the impact of the launch valve on the performance of the supercritical CO2 pneumatic launch, a numerical model was developed based on the principles of mass and energy conservation. Specifically, the thermos-physical properties of real gas
Jiaqiang Wang, Tian Li, Zixuan Zhang, Shujian Yao, Zhaijun Lu   +4 more
doaj   +1 more source

Cluster-Based 3-D Channel Modeling for Massive MIMO in Subway Station Environment

IEEE Access, 2018
In this paper, a massive multiple-input multiple-output (MIMO) channel measurement campaign with 256-element virtual rectangular array at the base station was conducted.
Jianzhi Li, Bo Ai, Ruisi He, Mi Yang, Qi Wang, Bei Zhang, Zhangdui Zhong   +6 more
doaj   +1 more source

Persistent Traffic Offenders: Alcohol Consumption and Personality as Predictors of Driving Disqualification

European Journal of Psychology Applied to Legal Context, 2019
Traffic safety is an important social problem. Many accidents are due to non-compliance with traffic regulations. Serious or repeated offenses are sanctioned with penalty points or court conviction, and sanctions can lead to disqualification from driving.
Ana Martí-Belda, Juan C. Pastor, Luis Montoro, Patricia Bosó, Javier Roca   +4 more
doaj   +1 more source

Is safety in the eye of the beholder? Discrepancies between self-reported and proxied data on road safety behaviors—A systematic review

Frontiers in Psychology, 2022
Recent studies have problematized on the lack of agreement between self-reported and proxied data in the field of road safety-related behaviors. Overall, and although these studies are still scarce, most of them suggest that the way we perceive our own ...
Sergio A. Useche, Mireia Faus, Francisco Alonso   +2 more
doaj   +1 more source

Knowledge, perceived effectiveness and qualification of traffic rules, police supervision, sanctions and justice

Cogent Social Sciences, 2017
Road safety is a complex process that not only depends on technical and environmental improvements, but in a major part from human factors. In this sense, recent empirical studies have remarked the need to study the interaction between subject and laws ...
Francisco Alonso, Cristina Esteban, Luis Montoro, Sergio A. Useche   +3 more
doaj   +1 more source

Improved Robust Vehicle Detection and Identification Based on Single Magnetic Sensor

IEEE Access, 2018
Vehicle detection and identification techniques have been widely applied in traffic scene to acquire traffic information depending on various sensors, such as video camera, induction loop, and magnetic sensor.
Honghui Dong, Xuzhao Wang, Chao Zhang, Ruisi He, Limin Jia, Yong Qin   +5 more
doaj   +1 more source

Numerical Investigation of the Effects of Sand Collision on the Aerodynamic Behaviour of a High-Speed Train Subjected to Yaw Angles

Journal of Applied Fluid Mechanics, 2019
In this paper, the aerodynamic performance of the head car of a CRH2 train running in sandstorms was investigated. A numerical simulation method based on Realizable k-ε turbulence model was used to explore the flow features around the high-speed train ...
J. Wang, D. Liu, G. Gao, Y. Zhang, Jie Zhang   +4 more
doaj   +2 more sources

Aerodynamic Study of Two Opposing Moving Trains in a Tunnel Based on Different Nose Contours

Journal of Applied Fluid Mechanics, 2017
It is well known that the train nose shape has significant influence on the aerodynamic characteristics. This study explores the influence of four kinds of nose shapes (fusiform, flat-broad, bulge-broad, ellipsoidal) on the aerodynamic performance of two
W. H. Li, T. H. Liu, J. Zhang, Z. W. Chen, X. D. Chen, T. Z. Xie   +5 more
doaj  

3D−Printed Gradient TPMS Sandwich Structures: A Study on Bending Performance

Applied Sciences
Triply Periodic Minimal Surface (TPMS) sandwich structures are excellent lightweight load−bearing structures, yet existing 3D printing solutions focus on homogeneous TPMS lattices or their compressive behavior, lacking research on gradient−thickness TPMS
Shuguang Yao, Xinyu Gu, Minhan Xie, Ping Xu, Meng Tang, Jingwen Tan, Guangxiang Hao   +6 more
doaj   +1 more source

Numerical simulation of the aerodynamic characteristics of double unit train

Engineering Applications of Computational Fluid Mechanics, 2020
Double unit trains running at high speeds may create additional aerodynamic challenges due to two streamlined structures with close proximity, exploring the aerodynamic performance of double unit trains is now critical.
Zijian Guo, Tanghong Liu, Hassan Hemida, Zhengwei Chen, Hongkang Liu   +4 more
doaj   +1 more source