Results 61 to 70 of about 32,294 (305)

3D‐Printed Hygroscopic Polymer Networks for High‐Humidity Triboelectric Nanogenerators to Wirelessly Power Implantable Electronic Devices‐ A Conceptual Pathway

Advanced Functional Materials, EarlyView.
This work develops 3D‐printable tribopolymer networks that can enhance triboelectric performance under high humidity environments. Polar hydrophilic functional groups and incorporation of zwitterionic monomers promote bound‐water–dominated interfacial polarization thereby increasing electrical outputs.
Linguangze Zhuo, Jiawang Zeng, Qian Chen, Valentin A. Bobrin, Deepak Mishra, Anthony Chun Yin Yuen, Yixia Zhang, Cyrille Boyer, Jin Zhang   +8 more
wiley   +1 more source

Longitudinal torsional vibrations of the chain drive system of mine scraper conveyor

Scientific Reports, 2023
To deeply analyse the dynamic characteristics of the scraper conveyor during operation, the mechanical characteristics of the coupled longitudinal and torsional vibrational modes under excitation by cargo loading are studied.
Jinnan Lu, Runkun Yang, Jun Mao, Chunxue Xie   +3 more
doaj   +1 more source

Ambient vibration re-testing and operational modal analysis of the Humber Bridge [PDF]

, 2010
An ambient vibration survey of the Humber Bridge was carried out in July 2008 by a combined team from the UK, Portugal and Hong Kong. The exercise had several purposes that included the evaluation of the current technology for instrumentation and system ...
Abdel-Ghaffar, Alvaro Cunha, Andersen, Ashkenazi, Brownjohn, Brownjohn, Brownjohn, Brownjohn, Brownjohn, Carder, Cheli, Cheung, Conte, Cunha, Cunha, Dumanoglu, Dumanoglu, Elsa Caetano, Filipe Magalhaes, Fitzpatrick, Frandsen, Gurney, Hoult, J.M.W. Brownjohn, James, Juang, Kumarasena, Larsen, Littler, Macdonald, Magalhaes, Miyata, Nayeri, Pakzad, Pappa, Pavic, Peeters, Reynders, Siringoringo, Stephen, Van Overschee, Vincent, Wong, Xu   +43 more
core   +1 more source

Advanced Design for Weakly Coupled Resonators by Automatic Active Optimization

Advanced Materials Technologies, EarlyView.
An Automatic Active Optimization (AAO) strategy integrates machine learning predictors and genetic algorithms in a closed‐loop workflow. By iteratively expanding its dataset with new discoveries, AAO overcomes the limits of conventional methods. This approach finds superior microstructural designs beyond the initial sample space. We demonstrate this on
Wei Yue, Yuan Gao, Fanping Sui, Jason Wang, Megan Teng, Peggy Tsao, Huicong Deng, Yande Peng, Liwei Lin   +8 more
wiley   +1 more source

Mechanism Analysis and Suppression Strategy of Torsional Vibrations of DFIG Shaft System Considering Torque Control of Wind Turbine

Zhongguo dianli, 2022
The shafting model of the doubly-fed induction generator (DFIG) can be equivalent to the wind turbine mass connected to the generator mass via the flexible shaft, and the shaft system has great flexibility and low damping and encounters torsional ...
Sujuan SUN, Qiantao HUO, Lixin SUN, Liang GUO, Rui WANG, Xiangmei KONG   +5 more
doaj   +1 more source

On sixfold coupled buckling of thin-walled composite beams [PDF]

, 2009
A general analytical model based on shear-deformable beam theory has been developed to study the flexural–torsional coupled buckling of thin-walled composite beams with arbitrary lay-ups under axial load.
Back, Cortinez, Cortinez, Davalos, Gjelsvik, Jaehong Lee, Jones, Kim, Kim, Kim, Kollar, Kollar, Kollar, Lee, Lee, Librescu, Lin, Machado, Pandey, Piovan, Qiao, Shan, Shield, Thuc Phuong Vo, Timoshenko, Trahair, Vlasov   +26 more
core   +2 more sources

Bifurcation characteristics of torsional-horizontal coupled vibration of rolling mill system [PDF]

Journal of Vibroengineering, 2017
In this paper, the static bifurcation and dynamic bifurcation of rolling mill system with torsional-horizontal coupling vibration are studied. Firstly, the dynamic equation of torsional-horizontal coupled vibration of rolling mill main drive system is established. Rolling mill is driven by the gear pair, so the torsional vibration of the gear pair, the
Shuang Liu, Yatao Shi, Yunpeng Zhang, Meng Zong   +3 more
openaire   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

A Dumbbell Shaped Piezoelectric Motor Driven by the First-Order Torsional and the First-Order Flexural Vibrations

Actuators, 2020
A piezoelectric motor driven by the first-order torsional and first-order flexural (T/F) vibrations is designed, fabricated, and tested in this study. The actuating force is generated by the torsional vibration of the dumbbell-shaped vibrator, while the ...
Jianye Niu, Jiang Wu, Qiming Liu, Li Chen, Shijie Guo   +4 more
doaj   +1 more source

Pulsating magneto-dipole radiation of a quaking neutron star powered by energy of Alfven seismic vibrations

, 2011
We compute the characteristic parameters of magnetic dipole radiation of a neutron star undergoing torsional seismic vibrations under the action of Lorentz restoring force about axis of a dipolar magnetic field experiencing decay.
Abramowitz, Bastrukov, Irina Molodtsova, Jun-Wei Yu, Kouveliotou, Ledoux, Manchester R. N., Mereghetti, Pacini, Polyanin, Qiao, Ren-Xin Xu, Sergey Bastrukov, Weber, Xu, Xu   +15 more
core   +1 more source