Results 121 to 130 of about 285,442 (311)

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source

Large Eddy Simulation of an Onshore Wind Farm with the Actuator Line Model Including Wind Turbine’s Control below and above Rated Wind Speed

Energies, 2019
As the size of wind turbines increases and their hub heights become higher, which partially explains the vertiginous increase of wind power worldwide in the last decade, the interaction of wind turbines with the atmospheric boundary layer (ABL) and ...
Andrés Guggeri, Martín Draper
doaj   +1 more source

Heterointerface‑Enabled Electrocatalysis for Efficient Energy Conversion

Advanced Science, EarlyView.
Functionally distinct A/B materials can be integrated at the nanoscale to create customized heterointerfaces with tunable band alignment and charge redistribution, providing fast electron and ion transport channels as well as cooperative dual active sites.
Liuru Fang, Hsiwen Wu, Hengyue Xu, Jie Zhang   +3 more
wiley   +1 more source

Control of Large Wind Energy Systems Throughout the Shutdown Process

Machines
This contribution examines the control problem for very large wind energy converters during shutdown operation and analyses the most important control approaches.
Adrian Gambier
doaj   +1 more source

Study on Helicopter Antitorque Device Based on Cross-Flow Fan Technology

International Journal of Aerospace Engineering, 2016
In order to improve low-altitude flight security of single-rotor helicopter, an experimental model of a helicopter antitorque device is developed for wind tunnel test. The model is based on the flow control technology of the cross-flow fan (CFF).
Du Siliang, Tang Zhengfei, Xu Pei, Ji Mengjiang   +3 more
doaj   +1 more source

Flap-lag-torsion aeroelastic stability of a circulation control rotor in forward flight [PDF]

The aeroelastic stability of a circulation control rotor blade undergoing three degrees of motion (flap, lag, and torsion) is investigated in forward flight.
Chopra, Inderjit, Hong, Chang-Ho
core   +1 more source

Silicon‐Embedded Multifunctional Heterogeneous Integration for Miniaturized Photoplethysmography Detection Devices

Advanced Science, EarlyView.
ABSTRACT The multifunctional integration of chips with high flexibility and scalable manufacturing is crucial for enhancing chip performance, reducing chip size, and simplifying chip design. However, balancing volume, cost, flexibility, and functionality using traditional heterogeneous integration methods is challenging.
Lang Chen, Shizun Hu, Zhou Yang, Shitao Shen, Pan Zhang, Han Xu, Chi Zhang, Wei Wang   +7 more
wiley   +1 more source

Self‐Limiting Polymerization‐Induced Crystallization‐Driven Self‐Assembly (SL‐PI‐CDSA) Enables Templated Synthesis of Chiral Plasmonic, Hybrid 2D Hexagonal Assemblies

Angewandte Chemie, EarlyView.
This work details the rapid generation (t ≤ 5 min) of size‐tunable, ultralow dispersity (Ð ≤ 1.01) 2D hexagonal nanosheets by self‐limiting polymerization‐induced crystallization‐driven self‐assembly (SL‐PI‐CDSA) of modular and templating poly(aryl isocyanide) block copolymers, with functions that permit post‐polymerization modifications. Specifically,
Randall A. Scanga, Sean H. Sarault, Amin Kiani, Patryk Wąsik, Anthony J. Branco, Sophie A. Harris, Sangmin Jeong, Ali Shahrokhinia, Jake Borges, Cassidy M. Anunciacao, Jayant Kumar, Lawrence M. Wolf, Michael B. Ross, James F. Reuther   +13 more
wiley   +2 more sources

DESIGN OF THE LOW-LEVEL CONTROL SYSTEM IN LONGITUDINAL CHANNEL OF AN UNMANNED HELICOPTER

Научный вестник МГТУ ГА, 2016
This paper describes the design of the collective pitch control law of an unmanned helicopter in low-level altitude mode. The novelty is using an adaptive inner-loop control with an identifier and a reference model, which automatically provides ...
A. M. Bronnikov, E. O. Karavashkina, V. S. Kulabukhov, A. Yu. Chekin   +3 more
doaj  

Synchronised Control of Multiple Actuators of Wind Turbines

Actuators
Wind turbines align with the wind direction and adjust to wind speed by rotating their nacelle and blades using electromechanical or hydraulic actuators.
Adrian Gambier
doaj   +1 more source