Results 51 to 60 of about 16,922,350 (282)

Experimental and numerical assessment of the effect of speed and loading conditions on the nominal wake of a containership

Brodogradnja
An important aspect of the design of the propeller is the determination of the nominal wake. In this study, the nominal wake of a Post Panamax containership is determined numerically and experimentally at different speeds and loading conditions.
Carlo Giorgio Grlj, Nastia Degiuli, Ivana Martić   +2 more
doaj   +1 more source

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

Advanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Atom Probe Tomography as an Emerging Tool for Understanding Defect‑Driven Mechanisms in HfO2‑Based Ferroelectrics

Advanced Functional Materials, EarlyView.
This Perspective highlights atom probe tomography as a powerful tool for understanding the atomic‐scale defect chemistry in HfO2‐based ferroelectrics. 3D mapping of dopants, point defects, and interface chemistry can provide new insight into defect‐driven mechanisms underpinning the ferroelectricity in the system and guide the design of more reliable ...
Kasper Hunnestad, Catherine Dubourdieu, Alexei Gruverman, Dennis Meier   +3 more
wiley   +1 more source

Investigation of Tilt-Proprotor Loads Correlation Between Wind Tunnel Test Data and Comprehensive Modeling

Aerospace
The loads of a model tilt-proprotor with a gimbaled hub were measured in the wind tunnel of CHRDI, operating at 90°, 80°, 70°, 60°, and 45° inclination angles to represent the rotor loads of helicopter and transient flight modes.
Yin Ruan, Weite Wang, Wei Zhang
doaj   +1 more source

Computationally efficient aerodynamic modelling of swept wind turbine blades using coupled near-wake and vortex cylinder models [PDF]

Wind Energy Science
This study introduces a computationally efficient engineering aerodynamic model specifically designed for load calculations of swept wind turbine blades, overcoming limitations in existing models.
A. Li, M. Gaunaa, G. R. Pirrung
doaj   +1 more source

Examining the relationship between wind turbine blade performance and tip vortex behaviour in the wake [PDF]

, 1997
This paper details the results of laboratory tests on a model wind turbine rotor at the University of Edinburgh and examines tip vortex behaviour which questions the assumptions of current rotor performance prediction codes.
Whale, J.
core  

Enhanced Ferroelectric Phase Formation via Local Structure Modification in the Pre‐Crystalline State of Hafnium Zirconium Oxide Thin Films

Advanced Functional Materials, EarlyView.
Hafnium zirconium oxide thin films are grown using plasma‐enhanced atomic layer deposition with the addition of an atomic layer annealing (ALA) step. ALA leads to a change in the short‐range structure of the deposit and encourages formation of the ferroelectric Pca21 phase. The result is wake‐up‐free performance with films exposed to ALA.
Nicolas K. Lam, Gerald R. Bejger, Waseem A. Wani, Kristina M. Holsgrove, Andrew N. Titus, Niyorjyoti Sharma, Shihao Wang, Keithen Orson, Megan K. Lenox, Liron Shvilberg, Yong Kyu Choi, Ian A. Brummel, Benjamin L. Aronson, Petra Reinke, Quentin Ramasse, Amit Kumar, Brian J. Rodriguez, Christina M. Rost, Jon F. Ihlefeld   +18 more
wiley   +1 more source

COMPUTATIONAL MODELING OF AERODYNAMIC INTERFERENCE OF HELICOPTER MAIN AND TAIL ROTORS AT THE SPECIAL FLIGHT REGIMES

Научный вестник МГТУ ГА, 2016
This article is concentrated on modeling and researching of aerodynamic characteristics of main and tail rotors’ combination of a single-rotor helicopter scheme. Non-linear free wake vortical model with diffusion of free wake is used.
Y. M. Ignatkin, P. V. Makeev, A. I. Shomov   +2 more
doaj  

Autonomous Multi‐Objective Nanoscale Characterization of Combinatorial (Al, Sc, B)N Films Reveals Composition‐Dependent Ferroelectric Regimes

Advanced Functional Materials, EarlyView.
Autonomous scanning probe microscopy and multi‐objective Bayesian optimization navigate a ternary (Al,Sc,B)N combinatorial library. Registered photoluminescence, electron‐probe compositional mapping, and X‐ray diffraction connect local electromechanical function to defect‐sensitive emission, composition, and crystal structure.
Yu Liu, Aditya Raghavan, Utkarsh Pratiush, Ian Mercer, Pochun Hsieh, Albert Suceava, Chih‐Yu Lee, Edgar Dimitrov, Mauricio Terrones, Ichiro Takeuchi, Venkatraman Gopalan, Jon‐Paul Maria, Sergei V. Kalinin   +12 more
wiley   +1 more source

Power Optimization of Wind Farms Based on Improved Jensen Model and Deep Reinforcement Learning

Zhongguo dianli
The power capture capability of wind farms is constrained by various factors. To maximize the power output of wind farms and address the impacts of wake effects and turbulent wind speeds, this paper proposes a wind farm control scheme based on deep ...
Guanchao WANG, Yuchong HUO, Qun LI, Qiang LI   +3 more
doaj   +1 more source