Results 21 to 30 of about 1,436,618 (296)

Energy-efficient and high-spectrum-efficiency wireless transmission

open access: yesICST Transactions on Mobile Communications and Applications, 2022
With the deployment and commercialization of the fifth-generation (5G) mobile communication networks, the access nodes and data volume of wireless networks are showing massive and explosive growth. In this paper, we firstly review the research progress on the energy-efficient and spectrum-efficient wireless transmission, from the perspectives of both ...
Yajuan Tang   +29 more
openaire   +2 more sources

Effects of Bounded Uncertainties on the Dynamic Characteristics of an Overhung Rotor System with Rubbing Fault

open access: yesEnergies, 2019
This paper investigated the nonlinear vibrations of an uncertain overhung rotor system with rub-impact fault. As the clearance of the rotor and stator is getting smaller, contact between them often occurs at high rotation speeds.
Chao Fu   +4 more
doaj   +1 more source

Improvement and optimization of NMEA2000 based on an autonomous and controllable platform

open access: yesZhongguo Jianchuan Yanjiu, 2021
ObjectivesIn order to expand the application of NMEA2000 communication protocol standard and optimize and improve its transmission efficiency, an NMEA2000 data acquisition and transmission system based on an autonomous and controllable platform is ...
Weibo ZHONG   +3 more
doaj   +1 more source

Efficient transient simulation of transmission lines [PDF]

open access: yes, 2002
The paper focuses on revealing the salient structural aspects of a new transmission-line model with a view to exploiting them for gains in efficiency and accuracy. The new transmission-line model has as its basis the Telegraphers Equations but the manner
Condon, Marissa
core   +1 more source

Spectral Efficiency and Energy Efficiency Tradeoff in Massive MIMO Downlink Transmission with Statistical CSIT

open access: yes, 2020
As a key technology for future wireless networks, massive multiple-input multiple-output (MIMO) can significantly improve the energy efficiency (EE) and spectral efficiency (SE), and the performance is highly dependant on the degree of the available ...
Gao, Xiqi   +4 more
core   +1 more source

Partially Nondestructive Continuous Detection of Individual Traveling Optical Photons [PDF]

open access: yes, 2015
We report the continuous and partially nondestructive measurement of optical photons. For a weak light pulse traveling through a slow-light optical medium (signal), the associated atomic-excitation component is detected by another light beam (probe) with
Beck, Kristin M.   +4 more
core   +2 more sources

Analysis of wireless power transfer based on metamaterial using equivalent circuit

open access: yesThe Journal of Engineering, 2019
The metamaterial (MA) has been proved to enhance the efficiency of the wireless power transfer (WPT) system considerably in many studies. This study presents an equivalent circuit model using a qualitative and even quantitative simple explanation for the
Cancan Rong   +8 more
doaj   +1 more source

Vector Competence for Zika Virus Changes Depending on the Aedes aegypti’s Region of Origin in Manaus: A Study of an Endemic Brazilian Amazonian City

open access: yesViruses, 2023
Zika virus (ZIKV) is transmitted to humans by the infectious bite of mosquitoes such as Aedes aegypti. In a city, the population control of mosquitoes is carried out according to alerts generated by different districts via the analysis of the mosquito ...
Andréia da Costa Paz   +12 more
doaj   +1 more source

Research progress of blockchain network covert channel

open access: yesTongxin xuebao, 2022
Characterized by decentration, anonymity, strong robustness and tamper resistance, blockchain accompanied by digital currency is a natural carrier for building the covert communication channel.First, the definition and development history of the network ...
Leixiao LI   +5 more
doaj  

A Novel Method for the Dynamic Coefficients Identification of Journal Bearings Using Kalman Filter

open access: yesSensors, 2020
The dynamic coefficients identification of journal bearings is essential for instability analysis of rotation machinery. Aiming at the measured displacement of a single location, an improvement method associated with the Kalman filter is proposed to ...
Yang Kang   +4 more
doaj   +1 more source

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