Results 21 to 30 of about 10,661,294 (296)

Flying Drone Base Stations for Macro Hotspots

open access: yesIEEE Access, 2018
We study a scenario where multiple drone-mounted base stations cruise freely over a macro hotspot to serve mobile users on the ground. The drone base stations move constantly and update their moving directions following our proposed mobility control ...
Azade Fotouhi, Ming Ding, Mahbub Hassan
doaj   +1 more source

Real‐time coordination of connected vehicles at intersections using graphical mixed integer optimization

open access: yesIET Intelligent Transport Systems, 2021
Management of connected vehicles at unsignalised intersections is a large‐scale complex problem with safety constraints and time‐varying unsolved variables, which is crucial but hard to solve online.
Qiang Ge   +6 more
doaj   +1 more source

Multi-Sensor Data Fusion for Accurate Traffic Speed and Travel Time Reconstruction

open access: yesFrontiers in Future Transportation, 2021
This paper studies the joint reconstruction of traffic speeds and travel times by fusing sparse sensor data. Raw speed data from inductive loop detectors and floating cars as well as travel time measurements are combined using different fusion techniques.
Lisa Kessler    +2 more
doaj   +1 more source

Road-Type Detection Based on Traffic Sign and Lane Data

open access: yesJournal of Advanced Transportation, 2022
Establishing the current road type constitutes a significant assistance to car drivers, as, by default, the road type determines the legal speed limit.
Zoltán Fazekas   +4 more
doaj   +1 more source

On the Co-Design of AV-Enabled Mobility Systems [PDF]

open access: yes, 2020
The design of autonomous vehicles (AVs) and the design of AV-enabled mobility systems are closely coupled. Indeed, knowledge about the intended service of AVs would impact their design and deployment process, whilst insights about their technological ...
Frazzoli, Emilio   +12 more
core   +2 more sources

Joint Trajectory and Resource Optimization for UAV-Enabled Relaying Systems

open access: yesIEEE Access, 2020
Unmanned aerial vehicles (UAVs) have attracted attentions due to their mobility and high possibility of the line of sight (LoS) channel. We can fully use these two properties by carefully optimizing the UAVs' trajectories and cooperating with some ...
Qinbo Chen
doaj   +1 more source

Trajectory Planning of Automated Vehicles Using Real-Time Map Updates

open access: yesIEEE Access, 2023
The development of connected and automated vehicles (CAVs) presents a great opportunity to extend the current range of vehicle vision, by gathering information outside of its sensors.
Matyas Szanto   +5 more
doaj   +1 more source

A multi-country study of inter-generational educational mobility [PDF]

open access: yes, 2003
This paper analyses intergenerational educational mobility using survey data for twenty countries. We find that a number of interesting patterns emerge.
Chevalier, Arnaud   +2 more
core   +2 more sources

Particle Dampers for Vibration Reduction Designed for a Motorcycle Handlebar

open access: yesShock and Vibration
Health problems caused by excessive handle–arm vibrations (HAV) are very frequent in professionals working with machines that generate cyclic loads, like some hand tools (chainsaws, impulse tools and hammer drills, e.g.) and vehicles (like tractors and ...
Felipe Klein Fiorentin   +4 more
doaj   +1 more source

Supercritical CO2 Foam Stability in the Presence of Oil

open access: yesEnergies
Foam is a field-proven technique to reduce CO2 mobility and mitigate the impacts of reservoir heterogeneity in CO2-enhanced oil recovery (CO2-EOR). However, foams are unstable and tend to break down in the presence of oil.
Hilde Halsøy   +2 more
doaj   +1 more source

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