Results 81 to 90 of about 68,591 (267)

Contact Lens with Moiré Patterns for High‐Precision Eye Tracking

Advanced Functional Materials, EarlyView.
This work presents a passive contact lens for high‐precision eye tracking, integrating a microscopic moiré grating label. The parallax‐induced shift of macroscopic moiré patterns enables angle measurement with 0.28° precision using a standard camera under ambient light.
Ilia M. Fradkin, Roman V. Kirtaev, Mikhail S. Mironov, Dmitriy V. Grudinin, Alexander A. Marchenko, Marina M. Chugunova, Valentin R. Solovei, Alexander V. Syuy, Andrey A. Vyshnevyy, Ilya P. Radko, Aleksey V. Arsenin, Valentyn S. Volkov   +11 more
wiley   +1 more source

Ab initio identified design principles of solid-solution strengthening in Al

Science and Technology of Advanced Materials, 2013
Solid-solution strengthening in six Al–X binary systems is investigated using first-principle methods. The volumetric mismatch parameter and the solubility enthalpy per solute were calculated.
Duancheng Ma, Martin Friák, Johann von Pezold, Dierk Raabe and Jörg Neugebauer
doaj   +1 more source

Anticipation in the Polarization Chaos Synchronization of Uni-Directionally Coupled Vertical-Cavity Surface-Emitting Lasers With Polarization-Preserved Optical Injection

IEEE Access, 2018
We investigate numerically the anticipated synchronization in the two uni-directionally coupled vertical-cavity surface-emitting lasers (VCSELs) as master and slave configuration.
Elumalai Jayaprasath, Yu-Shuang Hou, Zheng-Mao Wu, Guang-Qiong Xia   +3 more
doaj   +1 more source

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

Model-free predictive flux vector control for N ∗ 3-Phase PMSM drives considering parameters mismatch

International Journal of Electrical Power & Energy Systems
This paper develops a novel model free-predictive flux vector control method (MF-PFVC) for high-performance stator flux and torque monitoring of the multi-module three-phase PMSM (N ∗ 3-Phase PMSM) drive with parameters mismatch.
Gongping Wu, Xiangyuan Chen, Qiuwei Wu, Zhuo Long, Sheng Huang, Changfan Zhang   +5 more
doaj   +1 more source

Ionic‐Electronic Hydrogel‐Liquid Metal Composite Bilayer with Tissue‐Adaptive and Adhesive Properties for Closed‐Loop Neuroprosthetic System

Advanced Functional Materials, EarlyView.
A hydrogel–liquid metal composite peripheral nerve interface (HLB‐PNI) combines electrically durable electrodes and tissue‐adhesive hydrogel for tissue‐adaptive implantation. In nerve‐injured rats, it enables the diagnosis of sensory‐motor connectivity via stimulation and neural signal recording.
Yewon Kim, Kyoungryong Kim, Jaehyon Kim, Heewon Choi, Mikyung Shin, Donghee Son   +5 more
wiley   +1 more source

Charge Transport in Ternary Charge‐Transfer Solid Solution Single Crystals

Advanced Functional Materials, EarlyView.
This study deconvolutes the roles of indirect (superexchange) and direct electronic coupling on charge transport in single crystals of an organic charge‐transfer molecular semiconductor (OSC). This model system elegantly demonstrates that structural defects introduced by chemical dopants play a significant role in the electronic performance ...
Jonathan C. Novak, Manikanta Makala, Edith L. MacKenzie, Veaceslav Coropceanu, Kimberly Agosto, Abigail A. Moravek, Oana D. Jurchescu, Ren A. Wiscons   +7 more
wiley   +1 more source

Joint-loss dependence on mismatch parameters in graded-index optical fibres

Electronics Letters, 1983
The dependence of the mean value and the RMS joint-loss distribution on geometrical and optical parameters deduced in practical cases by simple and compact formulas. The different sensitivities of the various parameters can suggest different, more advantageous choices of the tolerance set.
COPPA, Gianni, DI VITA P, ROSSI U.
openaire   +2 more sources

Encoding Magnetic Anisotropies in Digital Light Processing 3D Printing

Advanced Functional Materials, EarlyView.
A hybrid magnetic device—combining a coaxial coil within a nested Halbach array—is presented, integrated into a DLP 3D printer to enable spatially resolved magnetic field control. This system enables complex, multimodal responses by programming liquid crystal elastomer resins for magnetic and thermal actuation, and by inducing electrically conductive ...
Eléonore Aïdonidis, Andrea Cosola, Pierre Bourdon, Hichem Dammak, Marco Sangermano, Frédéric Demoly, Marco Faustini, Amélie Pérot, Didier Lairez, Rakine Mouhoubi, Sébastien Blanquer, Giancarlo Rizza   +11 more
wiley   +1 more source

Speed Control of BP Neural Networks Feed-Forward Compensation With Parameter Adaptation Based on Active Disturbance Rejection Control for PMSM

IEEE Access
Permanent magnet synchronous motor(PMSM) control system is a time-varying nonlinear system. To address the issue of poor tracking performance in control systems caused by mismatch between motor flux linkage parameter and speed loop controller parameter ...
Yubo Liu, Yanggen Huang, Zhuangsheng Jiang, Junlong Fang   +3 more
doaj   +1 more source