Results 41 to 50 of about 507 (175)

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

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

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

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

An Effective Numerical Approach for Fractional Integro‐Differential Systems Using Shifted Airfoil Polynomials

Journal of Mathematics, Volume 2026, Issue 1, 2026.
In this paper, we propose a projection method that utilizes shifted airfoil polynomials to solve systems of weakly singular fractional integro‐differential equations (FIDEs). The proposed approach converts the original system into two linear algebraic systems, facilitating efficient numerical solutions.
Saeed Althubiti, Chang Phang
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

On ℬ‐Analog of the Sumudu Transform Associated With the General Quantum ℬ‐Difference Operator

Journal of Mathematics, Volume 2026, Issue 1, 2026.
We present here a B‐analog of the Sumudu transform defined via a general quantum B‐difference operator which generalizes classical difference operators in the context of quantum calculus, is employed to study the proposed problem. We explore the core characteristics of the B‐Sumudu transform and illustrate its applications in solving B‐initial value ...
Karima M. Oraby, Youssri Hassan Youssri, Smritijit Sen   +2 more
wiley   +1 more source

Optical Mandibular Movement Tracking Devices, Clinical Uses and Indications

Australian Dental Journal, Volume 70, Issue S1, Page S25-S34, December 2025.
ABSTRACT Recent advancements in digital dentistry have facilitated the accurate recording of dynamic mandibular movements using optical tracking devices, thereby improving the clinical outcomes and the patient's ability to adapt to their oral rehabilitation.
Sandrine Couldwell, Claudia Maria Pichardo, Kyle Radomski, Jae‐Hyun Lee, Sang J. Lee   +4 more
wiley   +1 more source

Effect of Structural Parameters on Pantograph–Catenary Interaction Performance in High-Speed Railways

Infrastructures
With the rapid development of high-speed railways, the dynamic performance of the pantograph–catenary system plays a crucial role in ensuring the safe and stable operation of trains.
Tong Xing, Xufan Wang, Like Pan, Yang Song, Dehai Zhang, Qun Yu   +5 more
doaj   +1 more source