Results 81 to 90 of about 1,133,712 (335)

The Use of Piezoelectric Actuators in an Energy-Efficient Noise Reduction System [PDF]

, 2015
The piezoelectric effect allows for conversion between mechanical stress and electrical impulses. By utilizing this phenomenon, a novel method of sound attenuation was explored and tested in which a piezoelectric plate absorbs part of an incoming sound ...
Johnson, Ian J.M.
core   +1 more source

Resonant Absorption as Mode Conversion?

, 2010
Resonant absorption and mode conversion are both extensively studied mechanisms for wave "absorption" in solar magnetohydrodynamics (MHD). But are they really distinct? We re-examine a well-known simple resonant absorption model in a cold MHD plasma that
A.D. Polyanin, A.J. Brizard, C.M. Bender, D.H. Bailey, E.R. Tracy, H. Goedbloed, H. Schunker, J. Andries, J.A. Ionson, J.V. Hollweg, J.V. Hollweg, M. Goossens, M.J. Thompson, M.S. Ruderman, M.S. Ruderman, P. S. Cally, P.J. Hansen, P.S. Cally, P.S. Cally, P.S. Cally, P.S. Cally, P.S. Cally, P.S. Cally, P.S. Cally, S.C. Hansen, S.J. Schwartz   +25 more
core   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

Decay of isotropic flow and anisotropic flow with rotation or magnetic field or both in a weakly nonlinear regime

, 2016
We investigate numerically the decay of isotropic, rotating, magnetohydrodynamic (MHD), and rotating MHD flows in a periodic box. The Reynolds number $Re$ defined with the box size and the initial velocity is $100$ at which the flows are in a weakly ...
Wei, Xing
core   +1 more source

Decoupling control of a dual‐stator linear and rotary permanent magnet generator for offshore joint wind and wave energy conversion system

IET electric power applications, 2020
Wind and wave energy are the main forms of offshore energy. In this study, a new joint wind and wave energy (JWWE) power conversion system, which simultaneously features wind power generation and wave power generation, is investigated.
Lei Xu, Chao Zhang, Xiaoyong Zhu
semanticscholar   +1 more source

Tribological Performance of 60NiTi Alloy Under Varying Contact Conditions and Elevated Temperatures in Linear Reciprocating Sliding

Advanced Engineering Materials, EarlyView.
This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani, Miguel Angel Selles, Maziar Ramezani   +2 more
wiley   +1 more source

Experimental Study of Power Generation Performance for Pulley-Buoy-Accelerated Linear Wave Power Generation Systems

Applied Sciences
This study presents a pulley-buoy-accelerated linear wave power generation system and verifies its feasibility and effectiveness through experimental research.
Hu Chen, Bin Deng, Haoran Zhang, Canmi Fang, Yongqiang Tu   +4 more
doaj   +1 more source

Experimental and simulative study on throttle valve function in the process of wave energy conversion

Advances in Mechanical Engineering, 2017
In wave energy converters, it is hard to achieve efficient and stable energy generation because of wave instability. Based on a hydraulic transmission system of single float wave power generation equipment, this article studies the effect of throttle ...
Wei Zhang, Yanjun Liu, Shizhen Li, Tongtong He, Jingwen Liu   +4 more
doaj   +1 more source

Global Alfven Wave Heating of the Magnetosphere of Young Stars [PDF]

, 2002
Excitation of a Global Alfven wave (GAW) is proposed as a viable mechanism to explain plasma heating in the magnetosphere of young stars. The wave and basic plasma parameters are compatible with the requirement that the dissipation length of GAWs be ...
A. G. Elfimov, dos Santos L. C., Fadeev V. M., Goncalves D. R., Jatenco-Pereira V., Jatenco-Pereira V., R. M. O. Galvao, R. Opher, Scheurwater R., V. Jatenco‐Pereira   +9 more
core   +3 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source