Results 151 to 160 of about 94,319 (292)
An evaluation of some alternative approaches for reducing fan tone noise [PDF]
The potential of two alternative approaches for reducing fan ton noise was investigated in this study. One of these approaches increases the number of rotor blades to shift the tone noise to higher frequencies that are not rated as strongly by the ...
Dittmar, James H., Woodward, Richard P.
core +1 more source
A Spectral Matching Algorithm Based on the Wasserstein Metric
Journal of Chemometrics, Volume 40, Issue 6, June 2026.ABSTRACT Through visual inspection, scientists can easily judge the similarity of pairs of spectra from different sources, whether they are experimental measurements, spectra libraries, or spectra calculations. Spectral similarity is recognized when the peak patterns appear similar, even if the peak positions are shifted or the peak amplitudes are ...
Klaus Neymeyr +7 more
wiley +1 more source
Noise due to rotor-turbulence interaction [PDF]
A procedure for calculating the noise due to turbulent inflow to a propeller or helicopter rotor in hover is summarized. The method is based on a calculation of noise produced by an airfoil moving in rectilinear motion through turbulence.
Amiet, R. K.
core +1 more source
Electrochemical Science Advances, Volume 6, Issue 3, June 2026.NMR spectroscopy offers analytical methods to assess recycling strategies for PEMs designed to promote sustainable material use. ABSTRACT Proton exchange membrane (PEM) electrolysis is considered a promising technique for producing green hydrogen at high purity, yet it has not been implemented industrially on a large scale.
Robert Rameker +7 more
wiley +1 more source
Low noise sensorless control of a YASA AFFSPM motor using ADRC and improved PLL. [PDF]
Sci RepRahmani-Fard J, Mohammed MJ.
europepmc +1 more source
Stabilizing Plasmodium falciparum proteins for small molecule drug discovery
Protein Science, Volume 35, Issue 6, June 2026.Abstract Early‐stage drug discovery relies on the availability of stable protein for reliable biophysical characterization of ligand binding. However, many Plasmodium falciparum proteins are challenging to produce in heterologous systems, which limits their experimental utility.
Marius Amann +3 more
wiley +1 more source
Review and analysis of the DNW/Model 360 rotor acoustic data base [PDF]
A comprehensive model rotor aeroacoustic data base was collected in a large anechoic wind tunnel in 1986. Twenty-six microphones were positioned around the azimuth to collect acoustic data for approximately 150 different test conditions.
Boxwell, D. A. +2 more
core +1 more source
Wind Energy, Volume 29, Issue 6, June 2026.ABSTRACT Optimising turbine layouts to maximise power output is crucial for wind farm development, particularly in complex terrain where analytical wake models fail to capture key flow physics. We present the first application of Bayesian optimisation (BO) combined with large eddy simulations (LES) for utility‐scale wind farm layout optimisation in ...
Christian Jané‐Ippel +2 more
wiley +1 more source
Acoustic Wind Tunnel Measurements of a Quadcopter in Hover and Forward Flight Conditions [PDF]
An experimental testing campaign was conducted in the NASA Langley Low Speed Aeroacoustic Wind Tunnel (LSAWT) in order to better understand the acoustic characteristics of a representative quadcopter system in both hover and forward flight conditions ...
Pettingill, Nicole A. +1 more
core +1 more source
An Unscented Kalman Filter Based on the Adams-Bashforth Method with Applications to the State Estimation of Osprey-Type Drones Composed of Tiltable Rotor Mechanisms. [PDF]
Sensors (Basel)Watanabe K, Takeda S, Nagai I.
europepmc +1 more source