Results 51 to 60 of about 15,605,525 (207)

Hierarchical Reinforcement Learning for Long‐Distance Multi‐Objective Optimization of Heavy‐Haul Trains via Sequential Task Assignment Across Spatial Segments

IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
This paper proposes a sequential multi‐task collaboration hierarchical reinforcement learning framework for dynamic multi‐objective optimization of long‐distance heavy‐haul train operations. By decomposing the route into segment‐specific subtasks and coordinating sequential policy invocation through a top‐level dynamic programming framework, the ...
Jianhua Wang, Cong Wang, Qingyuan Wang, Yiding Yu, Xiaoyun Feng   +4 more
wiley   +1 more source

Introduction of variability in pantograph-catenary dynamic simulations [PDF]

, 2013
Currently, pantograph-catenary dynamic simulations codes are mainly based on deterministic approaches. However, the contact force between catenary and pantograph depends on many key parameters that are not always quantified precisely.
BALMES, Etienne, MASSAT, Jean-Pierre, Massat, Jean Pierre, LAURENT, Christophe, VO VAN, Olivier   +4 more
core  

FCDM‐Net: A Feature‐Calibrated Dynamic Masking Network Based on Pre‐Trained Models for Few‐Shot Catenary Component Anomaly Detection

IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
This paper proposes a novel feature‐calibrated dynamic masking network (FCDM‐Net) for the unified few‐shot anomaly detection of catenary components. First, a lightweight residual adapter is integrated with a frozen visual encoder. Through a few‐shot fine‐tuning strategy, the general visual features are mapped to the specific manifold space of catenary ...
Zefu Wei, Zhigang Liu, Guangwu Chen, Xin Zhou, Fuxia Wang, Peng Li   +5 more
wiley   +1 more source

Computational fluid dynamics-multibody system dynamics bidirectional coupling calculation and flow-induced vibration evaluation of a high-speed pantograph-catenary system

Engineering Applications of Computational Fluid Mechanics
Increasing the speed of a pantograph deteriorates its aerodynamic performance and aggravates the problem of flow-induced vibration, which is not conducive to the stability of the pantograph – catenary system (PCS). Currently, commercial high-speed trains
Zhuojun Li, ChunJiang Chen, Huapu Song, Gang Yang, Jun Yang, Huadong Yao, Jiqiang Niu   +6 more
doaj   +1 more source

An influence of track stiffness discontinuity on pantograph base vibrations and catenary–pantograph dynamic interaction

Studia Geotechnica et Mechanica, 2020
In this article, the computational methodology of the catenary–train–track system vibration analysis is presented and used to estimate the influence of vehicle body vibrations on the pantograph–catenary dynamic interaction.
Bryja Danuta, Hyliński Adam
doaj   +1 more source

Algorithmic Energy Management in Constrained Railway Traction Networks: A Systematic Review

IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
This systematic review synthesises the literature on algorithmic energy management for grid‐constrained multi‐train AC railway networks, classifying the reviewed studies by algorithm family, operational scope and constraint coupling. It finds that single‐train trajectory optimisation cannot represent the coupled electrical interactions that ...
Márton László Ambrus, Stuart Hillmansen, Zhongbei Tian   +2 more
wiley   +1 more source

Active Power Filter‐Based Low‐Frequency Ripple Power Suppression of the DC‐Link in Railway Traction Systems

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
This article presents an active power filtering control method to suppress ripple power in the DC‐link of railway traction systems, including both the inherent second‐order ripple of single‐phase rectifiers and additional frequency ripples introduced by the pantograph–catenary arc.
Wei Wang, Wei Jiang, Hao Yue, Xiangmin He, Xinke Wang, Wensheng Song   +5 more
wiley   +1 more source

Simple numerical calculation method of flow velocity on roof of train running in tunnel

Mechanical Engineering Journal, 2018
A pantograph mounted on a high-speed train roof is exposed to high-speed air flow while traveling, and lift force is generated in the pantograph. To ensure high current collecting performance of the pantograph, it is important to appropriately adjust the
Katsuhiro KIKUCHI, Yuhei NOGUCHI, Koji NAKADE, Shinya MASHIMO   +3 more
doaj   +1 more source

Mechanism Analysis of Low‐Frequency Oscillation in Traction Power Supply Networks Coupled With Electric Locomotives

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
The HB‐Floquet method is proposed to quantitatively assess periodic solutions, stability boundaries, and bifurcation behaviours of the high‐power, strongly nonlinear scenario in traction power supply networks coupled with electric locomotives. ABSTRACT This study investigates low‐frequency oscillations (LFOs) in traction power supply networks coupled ...
Xian Wang, Faqiang Wang, Xinchun Cao
wiley   +1 more source

Analytical Investigation of Fractional Nonlinear Systems in Compact‐Open Banach Spaces: Applications in the Chemical Wave Propagation Theory

Journal of Mathematics, Volume 2026, Issue 1, 2026.
In this work, we present some analytical and topological framework for fractional nonlinear systems on compact‐open Banach spaces. By using the locally compact property of these spaces, the continuity and compactness of nonlinear operators are rigorously established.
Faten H. Damag, Khaled M. Saad, Mohammad Alshammari, Amin Saif, Mohammed S. Alsharafi, Smritijit Sen   +5 more
wiley   +1 more source