Results 21 to 30 of about 5,351,386 (244)

An approach to harmonic load- and source-pull measurements for high-efficiency PA design [PDF]

open access: yes, 2004
High-efficiency power-amplifier design requires numerous efforts to investigate both input and output harmonic terminations effects. A simplified theoretical approach to clarify the relevance of such terminations is presented here, and design criteria to
Ernesto Limiti   +18 more
core   +1 more source

On the use of fake sources for source location privacy : trade-offs between energy and privacy [PDF]

open access: yes, 2011
Wireless sensor networks have enabled novel applications such as monitoring, where security is invariably a requirement. One aspect of security, namely source location privacy, is becoming an increasingly important property of some wireless sensor ...
Jhumka, Arshad   +5 more
core   +1 more source

A VSC transmission system using flying capacitor multilevel converters and selective harmonic elimination pWM control [PDF]

open access: yes, 2005
A transmission system based on voltage-source three-level flying capacitor (FC) multilevel converters with selective harmonic elimination pulse-width modulation (SHE-PWM) control is presented in this paper.
Lie Xu   +3 more
core   +1 more source

Lagrangian relaxation heuristics for the uncapacitated single-source multi-product facility location problem [PDF]

open access: yes, 2013
Facility location problem is one of the strategic logistical drivers within the supply chain which is a hard to solve optimization problem. In this study, we focus on the uncapacitated single-source multi-product production/distribution facility location
Nezhad, Ali Mohammad   +2 more
core   +1 more source

Harmonic tremor from the deep part of Hakone volcano

open access: yesEarth, Planets and Space, 2022
The feeding system of magmatic fluid from the volcanic root to a shallow magma reservoir remains a poorly understood issue. Seismic events, including volcanic tremors and low-frequency earthquakes, in a deep part beneath volcanos are key observations for
Yohei Yukutake   +3 more
doaj   +1 more source

Comparative Evaluation of Efficiency and Reliability of Single-Phase Five-Level NPC Inverters for Photovoltaic Systems

open access: yesIEEE Access, 2021
It is required to reduce the cost of PV energy to be competitive as an alternative energy source. The efficiency and reliability of PV inverters are important aspects to be enhanced to reduce the cost of PV energy since they contribute to the reduction ...
Ui-Min Choi, Taerim Ryu
doaj   +1 more source

Identifying harmonic attributes from online partial discharge data [PDF]

open access: yes, 2011
Partial discharge (PD) monitoring is a key method of tracking fault progression and degradation of insulation systems. Recent research discovered that the harmonic regime experienced by the plant also affects the PD pattern, questioning the conclusions ...
Rowland, S.M.   +4 more
core   +4 more sources

A Deep Learning Method for DOA Estimation with Covariance Matrices in Reverberant Environments

open access: yesApplied Sciences, 2022
Acoustic source localization in the spherical harmonic domain with reverberation has hitherto not been extensively investigated. Moreover, deep learning frameworks have been utilized to estimate the direction-of-arrival (DOA) with spherical microphone ...
Qinghua Huang, Weilun Fang
doaj   +1 more source

A harmonic source location strategy for distribution networks using group-sparse Bayesian learning under an edge-computing architecture

open access: yesInternational Journal of Electrical Power & Energy Systems
Conventional harmonic source location methods based on single-shot sampling or short-term measurements offer limited reliability. Therefore, this paper proposes a harmonic source location strategy for distribution networks using group-sparse Bayesian ...
Lipeng Zhou   +5 more
doaj   +1 more source

Research on Harmonic Characteristics Influence for Distribution Network with Renewable Energy

open access: yesMATEC Web of Conferences, 2016
In order to study the influence on harmonic characteristics of distribution network with renewable energy, a simplified model of distribution network is established to analyse theory while considering the influence of cable on the system capacitive ...
Huang Wei, Yang Yuyao, Huang Xiangmin
doaj   +1 more source

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