Results 31 to 40 of about 12,150 (160)

A survey on user-centric cell-free massive MIMO systems

Digital Communications and Networks, 2022
The mobile data traffic has been exponentially growing during the last several decades. This was enabled by the densification of the network infrastructure in terms of increased cell density (i.e., Ultra-Dense Network (UDN)) and/or the increased number ...
Shuaifei Chen, Jiayi Zhang, Jing Zhang, Emil Björnson, Bo Ai   +4 more
doaj   +1 more source

Experimental and Numerical Investigation of Reinforced Soil Slopes With Vertical Rib and Inclined Reinforcement: Application to Embankment Slopes

Advances in Civil Engineering
Reinforced soil technology is widely applied in slope stabilization, yet the optimal configuration of reinforcement remains a key design challenge. This study presents a comprehensive investigation of vertical rib-reinforced and inclined-reinforced ...
Peiyuan Wu, Zhongxiang Lu, Xuqing Pang, Yuzhen Ma, Xinkai Han, Yurui Lyu, Yucheng Li   +6 more
doaj   +1 more source

TF-DMB: A traffic flow theory-based dynamic multi-hop broadcast protocol

International Journal of Distributed Sensor Networks, 2017
In order to ensure traffic safety, the emergency warning message should be transmitted quickly and reliably in vehicular ad hoc networks by multi-hop broadcast.
Weiguang Ding, Hao Wu, Jin Wang
doaj   +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

Dynamic Study on a Passive Damping Scheme for Permanent Magnet Electrodynamic Suspension Vehicle Utilizing Onboard Magnets End Effects

Actuators
The permanent magnet electrodynamic suspension system (PMEDS) has demonstrated significant advantages in high-speed and ultra-high-speed applications due to its simple structure, low cost, and stable levitation force.
Shanqiang Fu, Mingang Chi, Anqi Shu, Junzhi Liu, Shuqing Zhang, Hongfu Shi, Zigang Deng   +6 more
doaj   +1 more source

Measured dynamic load distribution within the in situ axlebox bearing of high-speed trains under polygonal wheel–rail excitation

Railway Engineering Science
The dynamic load distribution within in-service axlebox bearings of high-speed trains is crucial for the fatigue reliability assessment and forward design of axlebox bearings. This paper presents an in situ measurement of the dynamic load distribution in
Yu Hou, Xi Wang, Jiaqi Wei, Menghua Zhao, Wei Zhao, Huailong Shi, Chengyu Sha   +6 more
doaj   +1 more source

Effects of Crash Dynamic Parameters of Urban Rail Transit Train on Climbing Behavior

Chengshi guidao jiaotong yanjiu
[Objective] In order to strengthen the passive safety design ability of urban rail transit trains during operation, it is necessary to study the effects of train crash dynamics parameters on climbing behavior.
Jiao XU, Qifan WU, Hongwei WANG, Shoune XIAO, Shang WANG   +4 more
doaj   +1 more source

Mobility-Aware Caching Scheduling for Fog Computing in mmWave Band

IEEE Access, 2018
As an extension of cloud computing, fog computing at the edge of networks provides low latency, location awareness, and real-time interactions. At the same time, millimeter-wave communications are able to provide directional multi-gigabit transmission ...
Yong Niu, Yu Liu, Yong Li, Zhangdui Zhong, Bo Ai, Pan Hui   +5 more
doaj   +1 more source

INS-aided GNSS jamming protection in support of resilient train positioning

High-Speed Railway
Railway safety and efficiency increasingly rely on precise train positioning. The integration of the Global Navigation Satellite System (GNSS) into railway control systems aims to reduce dependence on track-side infrastructure.
Zhuojian Cao, Jiang Liu, Wei Jiang, Baigen Cai   +3 more
doaj   +1 more source

Analysis of Metro Track Irregularity Performance under Different track bed Conditions

Chengshi guidao jiaotong yanjiu
［Objective］ With the increase in metro operating speeds and density, the deterioration rate of metro track regularity accelerates due to dynamic disturbance in train vehicles.
TU Yinghui, YAN Ziquan, LI Zaiwei, LIU Yanlin, ZHANG Lijun   +4 more
doaj   +1 more source