Results 51 to 60 of about 25,641,075 (274)

Ferrocene Derivatives for Improving the Efficiency and Stability of MA‐Free Perovskite Solar Cells from the Perspective of Inhibiting Ion Migration and Releasing Film Stress

open access: yesAdvanced Science, 2023
Further improvement of the performance and stability of inverted perovskite solar cells (PSCs) is necessary for commercialization. Here, ferrocene derivative dibenzoylferrocene (DBzFe) is used as an additive to enhance the performance and stability of MA‐
Huan Bi   +15 more
doaj   +1 more source

A Survey of Recent Advances in Optimization Methods for Wireless Communications [PDF]

open access: yesIEEE Journal on Selected Areas in Communications
Mathematical optimization is now widely regarded as an indispensable modeling and solution tool for the design of wireless communications systems. While optimization has played a significant role in the revolutionary progress in wireless communication ...
Ya-Feng Liu   +6 more
semanticscholar   +1 more source

Joint Cache-Channel Coding over Erasure Broadcast Channels

open access: yes, 2015
We consider a cache-aided communications system in which a transmitter communicates with many receivers over an erasure broadcast channel. The system serves as a basic model for communicating on-demand content during periods of high network congestion ...
Timo, Roy, Wigger, Michele
core   +1 more source

Satellite personal communications system [PDF]

open access: yes, 1980
Voice channel communication between low power mobile stations dispersed over a large area is provided by a system which includes a geostationary satellite utilizing a large UHF antenna that can receive a transmission from a caller and retransmit it over ...
Reilly, N. B., Smith, J. G.
core   +1 more source

MULTI-HAZARD RISK ASSESSMENT IN URBAN PLANNING AND DEVELOPMENT USING AHP [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Many cities across the world are exposed to more than one hazards. Focus on only the most prominent natural hazards, or the most recent event can be dangerous, as many potential threats to urban development are not assessed. Even when multiple hazards in
A. Sharma, H. Miyazaki
doaj   +1 more source

Implementation of In-Band Full-Duplex Using Software Defined Radio with Adaptive Filter-Based Self-Interference Cancellation

open access: yesFuture Internet, 2023
For next generation wireless communication systems, high throughput, low latency, and large user accommodation are popular and important required characteristics.
Wei-Shun Liao   +4 more
doaj   +1 more source

Optical communications system Patent [PDF]

open access: yes, 1969
Specifications and drawings for semipassive optical communication ...
Thomas, N. E.
core   +1 more source

A Novel Collision Avoidance Strategy with D2D Communications for UAV Systems

open access: yesDrones, 2023
In recent years, safety operation issues related to the autonomous flight of unmanned aerial vehicles (UAVs) have become popular research and development topics worldwide.
Lin Shan   +4 more
doaj   +1 more source

The Communications link analysis and simulation system (CLASS) [PDF]

open access: yes, 1985
The Communications Link Analysis and Simulation System (CLASS) is a comprehensive, computerized communications and tracking system analysis tool under development by the Networks Directorate of the NASA/GSFC.
Godfrey, R. D.
core   +1 more source

Machine Learning for Inverter-Fed Motors Monitoring and Fault Detection: An Overview

open access: yesIEEE Access
Monitoring and fault detection can be critical for efficient, safe and reliable operation of electric drive systems. Unfortunately, developing accurate physics-based models for these tasks is difficult due to unknown machine parameters and incomplete ...
Diego Garcia-Perez   +5 more
doaj   +1 more source

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