Results 61 to 70 of about 814,149 (338)

Enhancing Direct Solar Water Splitting via ALD of Multifunctional TiO2/Pt Nanoparticle Coatings With Engineered Interfaces to GaAs/GaInP Tandem Cells

Advanced Functional Materials, EarlyView.
Multifunctional atomic layer deposited coatings and interface treatments enhance direct solar water splitting on GaAs/GaInP tandem cells. Optimized TiO2/Pt nanoparticle bilayers ensure durability and catalytic efficiency with minimal optical losses, while H2 plasma pretreatments maximize photovoltage and interfacial charge extraction.
Tim F. Rieth, Verena Streibel, Oliver Bienek, Sergej Levashov, Johannes Dittloff, Kristof Möller, Johanna Eichhorn, Matthias M. May, Ian D. Sharp   +8 more
wiley   +1 more source

Active collision avoidance method for automated vehicles based on fuzzy PID algorithm

Automatika
The obstacle avoidance process of automated vehicles is susceptible to interference from issues such as acceleration and minimum collision avoidance distance, which increases the difficulty of automated vehicle active collision avoidance.
Lu Chen
doaj   +1 more source

Ship Collision Avoidance Based on the Vulnerability Assessment for Small Vessels in Bad Weather

IEEE Access, 2023
In the conditions of bad weather, the small vessels maneuvering ability of collision avoidance is seriously reduced and the vulnerability to maritime accidents increases due to the influence of strong wind and wave.
Hu Yancai, Wang Mingyu, Liu Yang
doaj   +1 more source

COLREGs-Compliant Multi-Ship Collision Avoidance Based on Multi-Agent Reinforcement Learning Technique

Journal of Marine Science and Engineering, 2022
The congestion of waterways can easily lead to traffic hazards. Moreover, according to the data, the majority of sea collisions are caused by human error and the failure to comply with the Convention on the International Regulation for the preventing ...
Guan Wei, Wang Kuo
semanticscholar   +1 more source

Double Helical Plasmonic Antennas

Advanced Functional Materials, EarlyView.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin, Luka Zurak, Krzysztof Maćkosz, Lorenz Löffler, Victor Deinhart, Ivo Utke, Thorsten Feichtner, Katja Höflich   +7 more
wiley   +1 more source

Virtual Reality Fusion Testing-Based Autonomous Collision Avoidance of Ships in Open Water: Methods and Practices

Journal of Marine Science and Engineering
With the rapid development of autonomous collision avoidance algorithms on ships, the technical demand for the testing and verification of autonomous collision avoidance algorithms is increasing; however, the current testing of autonomous collision ...
Haiming Zhou, Mao Zheng, Xiumin Chu, Chengqiang Yu, Jinyu Lei, Bowen Lin, Kehao Zhang, Wubin Hua   +7 more
doaj   +1 more source

High‐Concentration Mesogen‐Assisted Exfoliation of Low‐Dimensional Nanomaterials for Achieving Ultralow‐Temperature Actuations of Liquid Crystal Elastomers

Advanced Functional Materials, EarlyView.
Most matter is nominally frozen in the polar regions or space, and liquid crystal materials are no exception. Consequently, soft actuators, including liquid crystal elastomers (LCEs), are inoperative under such extreme cold in response to stimuli, as their motion relies on mechanical deformation.
Hyeonseong Kim, Yeon Gyeong Ha, Dong‐Gue Kang, Chinedum O. Osuji, Dae Seok Kim, Changyeon Lee   +5 more
wiley   +1 more source

Development of pedestrian collision avoidance strategy based on the fusion of Markov and social force models [PDF]

Mechanical Sciences
In urban traffic, accurate prediction of pedestrian trajectory and advanced collision avoidance strategy can effectively reduce the collision risk between intelligent vehicles and pedestrians.
B. Tang, Z. Yang, H. Jiang, Z. Hu
doaj   +1 more source

Defect Analysis of the β– to γ–Ga2O3 Phase Transition

Advanced Functional Materials, EarlyView.
The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas, Maciej O. Liedke, Huan Liu, Fabian Ganss, Maik Butterling, Nico Klingner, René Hübner, Ilja Makkonen, Andreas Wagner, Gregor Hlawacek   +9 more
wiley   +1 more source

Research on autonomous collision avoidance of merchant ship based on inverse reinforcement learning

International Journal of Advanced Robotic Systems, 2020
To learn the optimal collision avoidance policy of merchant ships controlled by human experts, a finite-state Markov decision process model for ship collision avoidance is proposed based on the analysis of collision avoidance mechanism, and an inverse ...
Mao Zheng, Shuo Xie, Xiumin Chu, Tianquan Zhu, Guohao Tian   +4 more
doaj   +1 more source