Results 71 to 80 of about 1,058,558 (285)

Innovative passive multifrequency propeller device for noise and vibration reduction in turboprop fuselage

MATEC Web of Conferences, 2018
One of the main comfort issue affecting the passenger comfort into a turboprop aircraft fuselage is the propeller tonal noise and the related vibrations.
De Fenza Angelo, Arena Maurizio, Lecce Leonardo   +2 more
doaj   +1 more source

A Reconfigurable Memristive Spiking Neuron Enabling Advanced Neuromorphic Computing

Advanced Science, EarlyView.
Pek Jun Tiw and co‐workers develop a reconfigurable memristive neuron that can exhibit four spiking behaviors with freely tunable spike train parameters. The neuron supports multiplexed spike encoding of multiple pieces of information. It also supports advanced neural network strategies, such as neural heterogeneity and dynamic mode switching ...
Pek Jun Tiw, Yuqi Li, Zhongyuan Li, Qihang Ding, Yuzhe Wang, Jiarong Wang, Yuchao Yang   +6 more
wiley   +1 more source

Effects of Different Attack Angles and Guide Vane Numbers on the Vortex-solid Interaction Noise of Axial Flow Fan [PDF]

Journal of Applied Fluid Mechanics
This paper utilizes experiments and numerical simulations to investigate the effects of different attack angles of the rotor and the number of guide vanes on the vortex-solid interaction and noise generation of an axial flow fan.
Z. Tu, Y. Li, J. Zhou, Z. Chen
doaj   +1 more source

Unsteady simulation of tonal noise from isolated centrifugal fan

, 2018
In this study, tonal noise from an isolated centrifugal fan is investigated using unsteady Reynolds-averaged Navier-Stokes (URANS) simulations. Isolated centrifugal fans are often used in ventilation systems and play an important role in producing tonal ...
Yao, Huadong,, Davidson, Lars,, Ottersten, Martin,   +2 more
core  

Twin‐Lever Multifunctional Meta‐Optics With High Longitudinal Tolerance

Advanced Science, EarlyView.
We introduce a single‐layer, CMOS‐compatible metasurface that allows for polarization‐programmable, achromatic broadband dual‐mode imaging with high longitudinal tolerance. The twin‐lever design combines bright‐field focusing and vortex‐based edge‐enhanced imaging while managing axial intensity distribution from 488 to 633 nm.
Isma Javed, Kyungtae Kim, Aqib Raza Shah, Dohyun Kang, Joohoon Kim, Azhar Javed Satti, Xuefeng Liu, Muhammad Zubair, Jichuan Xiong, Muhammad Qasim Mehmood, Junsuk Rho   +10 more
wiley   +1 more source

Experimental and Numerical Study of a UAV Propeller Printed in Clear Resin

Aerospace
This paper presents an experimental and numerical investigation of a 254 mm resin-printed propeller operating at rotational speeds between 3000 and 9000 RPM.
Mingtai Chen, Jacob Wimsatt, Tianming Liu, Tiegang Fang   +3 more
doaj   +1 more source

Electroacoustic Liner for tonal and broadband noise attenuation of turbofans

The new generation of Ultra-High-By-Pass-Ratio (UHBR) turbofan engine while considerably reducing fuel consumption, threatens higher noise levels at low frequencies because of its larger diameter, lower number of blades and rotational speed.
Volery, Maxime, Sergeev, Stanislav, Billon, Kevin, Ouisse, Morvan, De Bono, Emanuele, Lissek, Hervé, Mardjono, Jacky, Collet, Manuel   +7 more
core   +1 more source

14‐3‐3γ Protects Against Postoperative Cognitive Dysfunction by Regulating Tau Thr205 Phosphorylation and Synaptic Integrity

Advanced Science, EarlyView.
Integrative multi‐cohort analyses identify 14‐3‐3γ as a biomarker and regulator of cognitive vulnerability. Experimental studies show that 14‐3‐3γ loss is associated with Tau Thr205 phosphorylation, synaptic dysfunction, and cognitive impairment, while genetic overexpression or pharmacological stabilization of 14‐3‐3γ confers protective effects in ...
Shouqiang Zhu, Xue Han, Heng Zhang, Chang Ye, Tianjiao Xia, Xiaoping Gu   +5 more
wiley   +1 more source

Adversarial Representation Learning for Underwater Acoustic Noise Suppression in LOFARgram Space

IEEE Access
Underwater acoustic signal denoising technology aims to overcome the challenge of recovering tonal patterns of target sources such as ships and submarines in complex ocean environments. Conventional statistical methods and deep learning approaches suffer
Yujeong Pak, Yeongseo Shin, Yong Guk Kim, Chanjun Chun   +3 more
doaj   +1 more source

The effect of wavy leading edges on aerofoil-gust interaction noise [PDF]

, 2013
High-order accurate numerical simulations are performed to investigate the effects of wavy leading edges (WLEs) on aerofoil–gust interaction (AGI) noise.
Lau, A.S.H., Kim, J.W., Haeri, S.
core   +1 more source