Results 71 to 80 of about 516 (189)

Plant interaction networks reveal the limits of our understanding of diversity maintenance

Ecology Letters, Volume 27, Issue 2, February 2024.
Current theories for understanding and predicting the maintenance of diversity in plant systems focus almost exclusively on competition. We describe plant–plant interaction networks in a diverse, empirical wildflower community co‐occurring under a range of environmental conditions.
Malyon D. Bimler, Daniel B. Stouffer, Trace E. Martyn, Margaret M. Mayfield   +3 more
wiley   +1 more source

Fuzzy Integral Based Multi-Sensor Fusion for Arc Detection in the Pantograph-Catenary System [PDF]

, 2018
The pantograph-catenary subsystem is a fundamental component of a railway train since it provides the traction electrical power. A bad operating condition or, even worse, a failure can disrupt the railway traffic creating economic damages and, in some ...
Aydin, I., Barmada, Sami, Celebi, S. B., Tucci, Mauro   +3 more
core   +1 more source

Analysis and Improvement of Pantograph Carbon Strip Abnormal Wear on Luoyang Metro Line 1

Chengshi guidao jiaotong yanjiu
Objective During inspection, problems like the bad pantograph and catenary relation, pantograph-catenary arcing on the main line, burning points and serious wear on the pantograph carbon strip are detected since the trial operation of Luoyang Metro Line ...
WANG Liang, NIU Xiurong, LUO Min
doaj   +1 more source

Study of Electromagnetic Radiation From High‐Speed Train Voice and Data Antennae on the Health of Pacemaker Wearers

International Journal of RF and Microwave Computer-Aided Engineering, Volume 2024, Issue 1, 2024.
In China, high‐speed trains have become a major means of transportation for the masses. When the passengers wearing pacemakers travel on high‐speed trains, electromagnetic environment in the carriage where the GSM‐R voice and data antennae are located should be concerned.
Rui Tian, Hao Wu, Mai Lu, Xiao Ding
wiley   +1 more source

Analysis and development of power quality metrics for railway electric networks [PDF]

Ensuring acceptable levels of power quality (PQ) in electrified railway networks has become crucial due to the increased utilisation of power electronics within locomotives and power grids.
Seferi, Yljon
core   +2 more sources

Patterns in the Growth and Thematic Evolution of Artificial Intelligence Research: A Study Using Bradford Distribution of Productivity and Path Analysis

International Journal of Intelligent Systems, Volume 2024, Issue 1, 2024.
Artificial intelligence (AI) has emerged as a transformative technology with applications across multiple domains. The corpus of work related to the field of AI has grown significantly in volume as well as in terms of the application of AI in wider domains. However, given the wide application of AI in diverse areas, the measurement and characterization
Solanki Gupta, Anurag Kanaujia, Hiran H. Lathabai, Vivek Kumar Singh, Philipp Mayr, Vasudevan Rajamohan   +5 more
wiley   +1 more source

Study on Pantograph–Rigid Catenary Separation Through Simulation Experiments and the Dynamic Characteristics of DC Arcs

Machines
The pantograph–catenary system is a critical component of the traction power supply network. Due to hard points on the overhead contact line and vibrations of the pantograph, pantograph–catenary separation may occur, leading to offline DC arc events.
Zhaofeng Gong, Chang Liu, Shuai Xu, Guangxiao Wang, Wenzheng Liu, Gang Zhang   +5 more
doaj   +1 more source

Research on Lateral Vibration and Load Sensitivity Reductions for Large‐Scale Complex Nonconservative Systems Using Rigid‐Flex Coupling Simulation Technique

Shock and Vibration, Volume 2024, Issue 1, 2024.
For large‐scale complex nonconservative systems such as high‐speed rolling stock, the rigid‐flex coupling simulation technique is one of the effective methods in reducing lateral vibration and dynamic load sensitivity. Since two uncertain influences of wheel spin dissipation are caused by wheelset yaw oscillations and alternative load path variation ...
Qi-bin Wang, Xing-jia Xu, Si-yang Piao, Chun-ge Nie, Qiu-ze Li, Ming-wei Piao, Marco Civera   +6 more
wiley   +1 more source

Research on Electromagnetic Transient Processes of Long Marshalling High-Speed Train Passing Articulated Split-Phase Region

IEEE Access, 2019
When a long marshaling high-speed train (HST) with two raised pantographs passes an articulated split-phase region, there will be eight electromagnetic transient processes along with pantograph arcing.
Ke Huang, Zhigang Liu, Xin Li
doaj   +1 more source

Filter transients onboard DC rolling stock and exploitation for the estimate of the line impedance [PDF]

, 2020
Power supply transients in dc railways related to filter charging may trigger network and filter oscillatory responses, as well as cause very fast voltage spikes.
Femine A. D., Giordano D., Mariscotti A., Signorino D.   +3 more
core   +2 more sources