Results 231 to 240 of about 1,368,932 (431)

Urban Wind Turbines

open access: yes, 2009
The purpose of this project is a feasibility study of using urban wind turbines near populated areas. Urban wind turbines are rarely used nowadays and they are a new field to discover. This project involves researching different technical and design solutions, their advantages and disadvantages, all the problems which have appeared about noise, shadows
openaire   +1 more source

Synthetic Lignin Oligomers: Analytical Techniques, Challenges, and Opportunities

open access: yesChemSusChem, EarlyView.
The review begins by discussing lignin and its structural complexity, followed by challenges in elucidating depolymerization products and the analytical techniques used. It then focuses on the chemical structure of synthetic lignin oligomers, their synthesis mechanisms, and their significance in current science. Finally, scientific gaps are identified,
Myriam Rojas   +4 more
wiley   +1 more source

Selective Recovery of Critical Minerals from Simulated Electronic Wastes Via Reaction‐Diffusion Coupling

open access: yesChemSusChem, EarlyView.
We achieve the facile separation of Fe, Dy, and Nd from model solutions of electronic waste using reaction‐diffusion coupling. Using a suite of X‐ray imaging, characterization, atomistic, and continuum simulations, we develop a predictive model for the distribution of the components in the reaction medium.
Qingpu Wang   +10 more
wiley   +1 more source

Real-Time Dynamic Layout Optimization for Floating Offshore Wind Farm Control [PDF]

open access: yesarXiv
Downstream wind turbines operating behind upstream turbines face significant performance challenges due to reduced wind speeds and increased turbulence. This leads to decreased wind energy production and higher dynamic loads on downwind turbines. Consequently, real-time monitoring and control have become crucial for improving wind farm performance. One
arxiv  

Real‐Time Implementation of Unknown Input Observer‐Based State and Unknown Disturbance Estimation for Series Active Filters

open access: yesInternational Journal of Circuit Theory and Applications, EarlyView.
For the series active filter (SAF), a combined controller and observer scheme is proposed. Two controllers—state feedback (SFB) and linear quadratic regulator (LQR)—along with state observers, including the Luenberger observer (LO), proportional–integral observer (PIO), and unknown input observer (UIO), have been designed.
Nagulapati Kiran, I. E. S. Naidu
wiley   +1 more source

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