Results 51 to 60 of about 80,941 (296)

Atomic‐Level Ionic Displacement Polarization Enhanced Piezocatalytic Hydrogen Evolution in Covalent Organic Frameworks

Advanced Functional Materials, EarlyView.
Two isomorphic COFs were synthesized and compared, including an amphoteric COF (SQ‐TAPT) and a neutral COF (PDA‐TAPT). The ionic bonds in SQ‐TAPT introduce more Born effective charges, thereby enhancing its ionic displacement polarization. Experimental and theoretical calculations demonstrated that SQ‐TAPT exhibited higher polarity and stronger ...
Ge Yan, Xiaodong Sun, Kailai Zhang, Shuai Zhang, Haijun Hu, Hui Li, Zhenglong Li, Hongwei Huang, Liqun Ye, Jiyang Li, Yunling Liu, Hongge Pan, Tianyi Ma   +12 more
wiley   +1 more source

Experimental and numerical study of dynamic characteristic of a complex all-movable rudder system

Journal of Low Frequency Noise, Vibration and Active Control, 2018
Modal analysis and flutter computation of a complex tail cabin system including six all-movable rudders for hypersonic flight vehicle was studied in this paper.
Yuguang Bai, Wei Qian, Xiangyan Chen, Taojun Lu   +3 more
doaj   +1 more source

A Quick Assessment and Optimization Method for a Flutter Aerodynamic Measure of a Typical Flat Box Girder

Shock and Vibration, 2020
Flutter is one of the most serious wind-induced vibration phenomena for long-span bridges and may cause the collapse of a bridge (e.g., the Old Tacoma Bridge, 1940).
Feng Wang, Chuan Xiong, Zijian Wang, Congmin Guo, Hua Bai, Jiawu Li   +5 more
doaj   +1 more source

An Integrated Test-Based Nonlinear Aeroelastic Analysis Method to Freeplay-Induced Limit-Cycle Oscillations

International Journal of Aerospace Engineering, 2022
The nonlinear limit-cycle oscillations induced by aileron rotational freeplay are investigated by numerical simulation and flutter wind tunnel tests.
Yukai Sun, Zhigang Wu, Chao Yang, Xiangyu Wang, Chuansheng Wang   +4 more
doaj   +1 more source

Controlling Intestinal Organoid Polarity using Synthetic Dynamic Hydrogels Decorated with Laminin‐Derived IKVAV Peptides

Advanced Healthcare Materials, EarlyView.
Design rules are presented to control intestinal organoid polarity in fully synthetic hydrogels. The laminin‐derived IKVAV sequence is crucial to obtain correct intestinal organoid polarity. Increasing hydrogel dynamics further supports the growth of correctly polarized intestinal organoids, while a bulk level of stiffness (G’ ≈ 0.7 kPa) is crucial to ...
Laura Rijns, Joost A. P. M. Wijnakker, Victor A. Veenbrink, Riccardo Bellan, Fenna W. B. Craenmehr, Simone I. S. Hendrikse, Johnick F. van Sprang, Wim de Lau, E. W. Meijer, Hans Clevers, Patricia Y. W. Dankers   +10 more
wiley   +1 more source

Advances in Solid‐Phase Processing Techniques: Innovations, Applications, and Future Perspectives

Advanced Materials Technologies, EarlyView.
Based on practical manufacturing challenges, this review examines advanced solid‐phase processing techniques that overcome the inherent limitations of conventional melting‐based and traditional solid‐phase manufacturing, enabling the production of higher‐performance components at reduced cost through process innovation and improved supply‐chain ...
Tianhao Wang
wiley   +1 more source

Nonlinear Response Analysis of an Airfoil Using Multistep Differential Transform Method

IEEE Access
The analysis of limit cycle oscillations (LCOs) and flutter behavior in hypersonic aeroelastic systems presents significant challenges owing to their strong nonlinearities. This study demonstrates the applicability of the Multistep Differential Transform
S. Shali, Jafarali Parol, S. R. Nagaraja
doaj   +1 more source

AEROELASTIC FLUTTER ANALYSIS OF SUPERSONIC WING WITH MULTIPLE EXTERNAL STORES

International Islamic University Malaysia Engineering Journal, 2014
: Flutter may be considered to be one of the most dangerous aeroelastic failure phenomenon. The flutter characteristic differs for each aircraft type, and depends on the wing geometry as well as its operational region of subsonic, transonic or supersonic
Nur Azam, Erwin Sulaeman
doaj   +1 more source

Ultra‐Flexible Dual‐Band Organic Photodetectors for Visible and Near‐Infrared Sensing

Advanced Optical Materials, EarlyView.
An ultra‐flexible dual‐band organic photodetector with a total thickness of 5.6 µm for bio‐sensing is developed. It selectively detects visible and near‐infrared light with high sensitivity by switching the voltage. Peripheral oxygen saturation (SpO2) measurement is demonstrated using the device attached to a finger under a single light source by ...
Sachi Awakura, Hiroaki Jinno, Yusaku Tagawa, Ryota Fukuzawa, Masahito Takakuwa, Takao Someya, Tomoyuki Yokota   +6 more
wiley   +1 more source

The Future of Research in Cognitive Robotics: Foundation Models or Developmental Cognitive Models?

Advanced Robotics Research, EarlyView.
Research in cognitive robotics founded on principles of developmental psychology and enactive cognitive science would yield what we seek in autonomous robots: the ability to perceive its environment, learn from experience, anticipate the outcome of events, act to pursue goals, and adapt to changing circumstances without resorting to training with ...
David Vernon
wiley   +1 more source