Multi-Agent Deep Reinforcement Learning Based Optimizing Joint 3D Trajectories and Phase Shifts in RIS-Assisted UAV-Enabled Wireless Communications

Unmanned aerial vehicles (UAVs) serve as airborne access points or base stations, delivering network services to the Internet of Things devices (IoTDs) in areas with compromised or absent infrastructure.However, urban Wall Shelves obstacles like trees and high buildings can obstruct the connection between UAVs and IoTDs, leading to degraded communi

read more


On the equivalence of sefety criteria of the wheels derailment from the rails when using the directing or lateral force

Purpose.Clarification of safety criteria of the wheels derailment from the rails using either the lateral or the directing force.Methodology.Technique is connected with the analysis of safety criteria expressions of the wheels derailment from the rails, which use the lateral DANDRUFF/DRY SCALP CONDITIONER or the directing force in the position of l

read more