Results 81 to 90 of about 266,050 (343)

Optimal Locally Repairable Codes and Connections to Matroid Theory [PDF]

open access: yes, 2013
Petabyte-scale distributed storage systems are currently transitioning to erasure codes to achieve higher storage efficiency. Classical codes like Reed-Solomon are highly sub-optimal for distributed environments due to their high overhead in single ...
Dimakis, Alexandros G.   +2 more
core   +1 more source

Print‐and‐Plate Architected Electrodes for Electrochemical Transformations Under Flow

open access: yesAdvanced Functional Materials, EarlyView.
Typical flow cell electrodes are composed of stochastic porous carbon, limiting understanding of electrode structure‐performance relationships. This work describes an approach, termed “print‐and‐plate,” to prepare porous electrodes by direct ink writing followed by conformal metal coating.
Dylan M. Barber   +12 more
wiley   +1 more source

Analysis of a proposed connection for the two-winding single-phase self-excited induction generator operating at constant voltage and frequency

open access: yesJournal of Electrical Systems and Information Technology, 2019
This paper introduces the steady-state and dynamic behaviors of a proposed connection for the two-winding single-phase self-excited induction generator (TWSPSEIG) equipped with an excitation capacitor and a compensation capacitor for operation at ...
H. H. Hanafy   +3 more
doaj   +1 more source

Noise-assisted energy transport in electrical oscillator networks with off-diagonal dynamical disorder

open access: yes, 2015
Noise is generally thought as detrimental for energy transport in coupled oscillator networks. However, it has been shown that for certain coherently evolving systems, the presence of noise can enhance, somehow unexpectedly, their transport efficiency; a
Aragón, José L.   +6 more
core   +1 more source

Interfacial Contact Engineering Enables Giant‐Performance Semiconductor Nanomembrane Optoelectronic Devices

open access: yesAdvanced Functional Materials, EarlyView.
This work investigates modifying interfacial contacts in realizing giant‐performance semiconductor nanomembrane optoelectronics. Strategies, including surface reaction and buffer layer work‐function modulation, are explored to boost the Schottky barrier. An emerging material of YbOx is utilized for near‐ideal Ohmic contact.
Yibo Zhang   +5 more
wiley   +1 more source

Theoretical and experimental research on control strategy of maximum power point tracking for monolayer thermoelectric generator considering the degree of disturbance

open access: yesEnergy Reports, 2022
In this paper, the simulation model of thermoelectric generator and maximum power point tracking control (MPPT) DC/DC circuit is set up from the theory and mathematical formula. On this basis, this paper completes the maximum power point tracking control
Xinyu Liu   +7 more
doaj  

A NEW WIDE-STOPBAND LOW-PASS FILTER WITH GENERALIZED COUPLED-LINE CIRCUIT AND ANALYTICAL THEORY [PDF]

open access: yesProgress In Electromagnetics Research, 2011
A generalized coupled-line circuit is introduced to construct a wide-stopband low-pass fllter in this paper. This circuit conflguration includes two-section coupled lines and a connected transmission-line stub. Due to the symmetry of this proposed structure, closed-form equations for scattering parameters are investigated.
Yuanan Liu   +3 more
openaire   +1 more source

Elucidating Sodium Ion Storage Mechanisms in Hard Carbon Anodes at the Electronic Level

open access: yesAdvanced Functional Materials, EarlyView.
High‐resolution, multi‐frequency continuous wave, and pulsed Electron Paramagnetic Resonance (EPR) spectroscopy uncover the intricate Na ion storage mechanisms in hard carbon. This study reveals the coexistence of Na ion intercalation and solvent co‐intercalation, alongside a subsequent transition of Na ions from ionic to quasi‐metallic to metallic ...
Qingbing Xia   +5 more
wiley   +1 more source

Lyapunov Based Fast Terminal Sliding Mode Q-V Control of Grid Connected Hybrid Solar PV and Wind System

open access: yesIEEE Access, 2018
This paper shows the effectiveness of adaptive terminal sliding mode control in grid connected hybrid solar PV and wind system for improvement in error tracking performance under different disturbances.
Subhendu Bikash Santra   +3 more
doaj   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

open access: yesAdvanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar   +8 more
wiley   +1 more source

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