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A Novel Model for Describing Rail Weld Irregularities and Predicting Wheel-Rail Forces Using a Machine Learning Approach: 《Computer Modeling in Engineering & Sciences》2025年第1期555-577,共23页Linlin Sun Zihui Wang Shukun Cui Ziquan Yan Weiping Hu Qingchun Meng; supported by Natural Science Foundation of China(52178441);the Scientific Research Projects of the China Academy of Railway Sciences Co.,Ltd.(Grant No.2022YJ043).; Rail weld irregularities are one of the primary excitation sources for vehicle-track interaction dynamics in modern high-speed railways.They can cause significant wheel-rail dynamic interactions,leading to wheel-rail ...; 关键词：Rail weld irregularity high-speed railway vehicle-track coupled dynamics wheel/rail dynamic vertical force artificial neural networks

Study on the dynamic contact relationship between layers under temperature gradients in CRTSⅢ ballastless track被引量：2: 《High-Speed Railway》2024年第3期133-142,共10页Lei Zhao Guotang Zhao Guotao Yang Hao Jin Chenxi Li; supported by the National Natural Science Foundation of China(Grant No.52278466);the Project of China Academy of Railway Sciences Co.,Ltd(Grant No.2023YJ194).The useful contribution and discussions from project partners are also acknowledged.; In areas with large temperature differences,the uneven distribution of temperatures in the CRTS III ballastless track slab due to daytime sunlight can cause warpage deformation,leading to periodic rail irregularities ...; 关键词：High-speed railway Ballastless track Temperature gradient Periodic irregularities Interlayer contact

Detection Algorithm of Laboratory Personnel Irregularities Based on Improved YOLOv7: 《Computers, Materials & Continua》2024年第2期2741-2765,共25页Yongliang Yang Linghua Xu Maolin Luo Xiao Wang Min Cao; This study was supported by the National Natural Science Foundation of China(No.61861007);Guizhou ProvincialDepartment of Education Innovative Group Project(QianJiaohe KY[2021]012);Guizhou Science and Technology Plan Project(Guizhou Science Support[2023]General 412).; Due to the complex environment of the university laboratory,personnel flow intensive,personnel irregular behavior is easy to cause security risks.Monitoring using mainstream detection algorithms suffers from low detec...; 关键词：University laboratory personnel behavior YOLOv7 deformable convolutional networks attention module intersection over union

Comparison study on measurement of rail weld joint between inertial reference method and multi-point chord reference method: 《Railway Sciences》2024年第1期69-83,共15页Yifan Shi Yuan Wang Xiaozhou Liu Ping Wang; Purpose – Straightness measurement of rail weld joint is of essential importance to railway maintenance. Dueto the lack of efficient measurement equipment, there has been limited in-depth research on rail weld joint ...; 关键词：Rail weld joint Inertial reference method Short-wavelength irregularities Multi-point chord reference method 5-m wavelength range

On the solar activity dependence of midnight equatorial plasma bubbles during June solstice periods被引量：1: 《Earth and Planetary Physics》2021年第5期378-386,共9页K.K.Ajith S.Tulasi Ram GuoZhu Li M.Yamamoto K.Hozumi C.Y.Yatini P.Supnithi; partly supported by the National Natural Science Foundation of China(42020104002);by a Postdoctoral Fellowship at the Institute of Geology and Geophysics,Chinese Academy of Sciences(IGGCAS);partially supported by JSPS KAKENHI Grant Number 20H00197。; The occurrence of midnight Equatorial Plasma Bubbles(EPBs)during the June solstice period of the ascending phase of solar cycle 24,from 2010 to 2014,was studied using data from the 47 MHz Equatorial Atmosphere Radar(E...; 关键词：equatorial plasma bubbles equatorial ionosphere ionospheric instabilities and irregularities

Irregularities and Roughness: 《Journal of Architectural Environment & Structural Engineering Research》2021年第3期31-46,共16页G.T.Michaltsos T.Avraam; The periodically repeated pavement irregularities and their effect on the dynamic behavior of a bridge are the subject of this paper,as well as a new point of view of how the surface roughness operates on vehicles.The...; 关键词：IRREGULARITIES ROUGHNESS Bridges dynamics Vehicle models

Temporal and phenological profiles of open and dense Caatinga using remote sensing:response to precipitation and its irregularities: 《Journal of Forestry Research》2021年第3期1067-1076,共10页Janisson Batista de Jesus Tatiana Mora Kuplich íkaro Daniel de Carvalho Barreto Cristiano Niederauer da Rosa Fernando Luis Hillebrand; National Council for Scientific and Technological Development(CNPq);the Coordination of Superior Level StaffImprovement-Brazil(CAPES)。; Caatinga is a typical biome of Brazil's semiarid regions and subject to climate changes.Research is needed on the relation of its features to climate events.This study analyzed the infl uence of rainfall and its irreg...; 关键词：SEMIARID Tropical dry forest NDVI MODIS Phenopix

On Strong Correlations between Timing Irregularities and Surface Magnetic Field of Rotation-Powered Pulsars: 《International Journal of Astronomy and Astrophysics》2020年第4期346-355,共10页Evaristus Uzochukwu Iyida Christian Ikechukwu Eze Innocent Okwudili Eya; Using a large homogenous sample of Jodrell Bank Observatory (JBO) rotation-powered pulsars with derived pulsar parameter obtained from the Australian Telescope National Facility (ATNF) catalogue, we investigated the d...; 关键词：Methods: Statistical Stars: Neutron Pulsars: General

Numerical Analysis of Artificial Electron Heating Effects on Polar Mesospheric Winter Echoes被引量：1: 《Journal of Electronic Science and Technology》2020年第3期287-295,共9页Safi Ullah Hai-Long Li Abdur Rauf Lu-Yao Fu Mao-Yan Wang Lin Meng; supported by the National Natural Science Foundation of China under Grants No. 61671116 and No. 11905026;Fundamental Research Funds for the Central Universities under Grants No. ZYGX2019Z006 and No. ZYGX2019J012。; In this paper,an analytical model is used to analyze the modulated polar mesospheric winter echoes(PMWE).The winter parameters were introduced to simulate the effects of different parameters during the artificial elec...; 关键词：Artificial ionospheric heating electron density irregularities polar mesospheric winter echoes(PMWE) space plasma physics(numerical simulation)

Simple and fast prediction of train-induced track forces,ground and building vibrations被引量：2: 《Railway Engineering Science》2020年第3期232-250,共19页Lutz Auersch; A simple and fast prediction scheme is presented for train-induced ground and building vibrations.Simple models such as(one-dimensional)transfer matrices are used for the vehicle–track–soil interaction and for the b...; 关键词：Railway-induced vibration Ground vibration Layered soil Building response Excitation forces Track and vehicle irregularities

IRREGULARITIES